關於 sql select if ，我們在網路上蒐集到這些相關的討論、資訊與評價

「sql select if」的推薦目錄：

關於sql select if 在 โปรแกรมเมอร์ไทย Thai programmer Facebook 的最佳解答
關於sql select if 在 91 敏捷開發之路 Facebook 的最佳貼文
關於sql select if 在 91 敏捷開發之路 Facebook 的最佳貼文

關於sql select if 在 prasertcbs Youtube 的最讚貼文
關於sql select if 在吳老師教學部落格 Youtube 的精選貼文
關於sql select if 在吳老師教學部落格 Youtube 的最讚貼文

關於sql select if 在 How do I perform an IF...THEN in an SQL SELECT? 的評價
關於sql select if 在 How To use the IF… THEN ... ELSE statement In a SQL Server ... 的評價
關於sql select if 在 What's the point of WHERE 1=2 for SELECT INTO table query 的評價

sql select if 在 โปรแกรมเมอร์ไทย Thai programmer Facebook 的最佳解答

2020-09-13 13:37:54 有 286 人按讚

🤓 Data mining คืออะไรในวิชาทางคอม
มาเดี่ยวเล่าให้ฟัง
วิชานี้แปลตรงตัวก็คือ "การทำเหมืองข้อมูล"
อุปมาก็คล้ายกับเราไปทำเหมืองแร่ที่ขุดมาจากใต้ดินแหละครับ
.
แต่เหมืองที่ว่าเป็นเหมืองของข้อมูลดิบที่มีขนาดใหญ่นั่นเอง
.
คราวนี้จะให้ลองนึกถึงเวลาใช้คำสั่ง SQL เราจะรู้อยู่แล้วว่า
ข้อมูลมันอยู่ตรงไหนใน (Table) ใช่มั๊ยละ
พอเราใช้คำสั่ง select * from .... where...
ก็เลือกข้อมูลมาได้ตามต้องการ
.
แต่ถ้าเป็นคลังของข้อมูลดิบบบบบบบบบ
ที่มีปริมาณมาก ๆ เช่น
ข้อมูลเว็บไซต์ในโลกอินเตอร์เนตที่มีเยอะมาก ๆ
ข้อมูลพวกนี้จะใช้ SQL ค้นหาไม่ได้หรอกครับ
ข้อมูลยังไม่แยกเป็นตารางเลย
.
แล้วอย่างนี้ข้อมูลที่เราต้องการอยากรู้
ได้แก่ "ความรู้" หรือ "Knowledge"
ซึ่งความรู้ที่ว่า ไม่ใช้ข้อมูลแบบที่คิวรี่โดย SQL นะ
แต่จะได้เป็นความรู้ในฐานข้อมูล (Knowledge Discovery in Database - KDD)
ซึ่งก็คือ รูปแบบ (pattern) และความสัมพันธ์ (associations) ที่แอบซ่อนอยู่ในชุดข้อมูลนั้นๆ
.
🤔 ซึ่งคำถาม แล้วเราจะหาเจอได้ยังไง?
ภายใต้ข้อมูลดิบที่มีเยอะเหลือเกิ๊น
แถมหายากอีกต่างหากละพี่น้อง?
.
ดังนั้นเราจึงหนีไม่พ้นต้องมาทำเหมืองข้อมูลกัน
ช่างไม่ต่างอะไรกับทำเหมืองแร่
กว่าเราจะเจอ ดีบุก ถ่านหิน เพชร พลอย ทอง ฯลฯ
โอ๋ต้องใช้เทคโนโลยี ขุดเจาะหากว่าจะเจอ
ไม่ใช่ของกล้วย ๆ เลยนะครับ
เพราะกว่าจะได้สิ่งมีค่าออกมา
ก็เจอแต่เศษหิน เศษกราด เยอะแยะเต็มไปได้
สิ่งที่ต้องการอยากได้มีน้อยนิดเหลือเกิน
.
Data mining ก็เช่นกัน
กว่าจะทำการขุดๆ และขุด
จนได้ความรู้ออกมา
มันทำไม่ได้ง่ายๆ ต้องใช้คอมทำ
ต้องมีอัลกอริทึมให้ทำงานอัตโนมัติ
ทำด้วยมือคนไม่ไหว ตายลูกเดียว
.
ด้วยเหตุนี้วิชา Data mining
จึงถือกำเนิดอุแว้ขึ้นมาในยุค 1970
ซึ่งมันเป็นศาสตร์ที่ต้องเอาหลาย ๆ วิชารวมกัน
หลัก ๆ ก็วิชา -> Machine Learning(สาขาหนึ่งของวิชา AI) + วิชาสถิติ + ฐานข้อมูล
.
สำหรับประโยชน์ของ Data mining
ทำให้การค้นหาความรู้จากข้อมูล
มันอิจฉริยะขึ้นครับ ไม่ต้องทำมือเอง
แต่ใช้คอมทำให้อัตโนมัติ ซึ่งจะมีประโยชน์มาก ๆ ตัวอย่าง เช่น
.
-ใช้จัดระดับความเสี่ยงของผู้ขอเครดิต เป็นระดับต่ำ กลาง และสูง
-ทำนายพฤติกรรมการซื้อสินค้า ว่าลูกค้าจะหยิบอะไรใส่รถเข็น
-หาความเสี่ยงของผู้ป่วยเป็นโรงมะเร็ง จากผู้ติดเชื้อไวรัสโคโรน่า
-หาเนื้อคู่เรา (อันนี้ล้อเล่นนะ ไม่รู้ว่ามีใครสนใจทำจริงเปล่า อิ ๆ ๆ)
และประโยชน์อื่น ๆ อีกเยอะมาก เป็นต้น
.
** หมายเหตุ
Data mining มันมีมานานแล้ว สมัยยังไม่ดังเท่าไร
ไม่เหมือน Data Science ซึ่งจะรู้จักมากกว่าในยุคนี้
เพราะเด็กม. 5 ก็จะได้เรียน Data Science กันแหละ
ในวิชาหลักสูตรใหม่แกะกล่องชื่อ "วิทยาการคำนวณ"
.
ถ้าเปรียบเทียบกับงาน
Data analysis กับ Data science
มันก็คือซับเซทหนึ่งนั่นเองตามรูปที่โพสต์
ซึ่งวิชาพวกนี้หนีไม่พ้นโยงใยไปในเรื่อง Machine Learning(สาขาหนึ่งของวิชา AI)
.
✍เขียนโดย โปรแกรมเมอร์ไทย thai progammer
.
.
++++++++++++++++++++++++++++
+++++ต่อไปขออนุญาติขายของนะ +++++
📔 หนังสือ "ปัญญาประดิษฐ์ (AI) ไม่ยาก" เข้าใจได้ด้วยเลขม. ปลาย (เนื้อหาภาษาไทย)
.
ถ้าสนใจสั่งซื้อเล่ม 1 ก็สั่งซื้อได้ที่
👉 https://www.mebmarket.com/web/index.php…
.
ขออภัยยังไม่มีเล่มกระดาษจำหน่าย มีแต่ ebook
.
ส่วนตัวอย่างหนังสือ ก็ดูได้ลิงค์นี้
👉 https://www.dropbox.com/s/fg8l38hc0k9b…/chapter_example.pdf…
.

✍เขียนโดย โปรแกรมเมอร์ไทย thai programmer
🤓 What is Data mining in computer subjects?
I'll tell you about it.
This subject translates right to ′′ data mining
The metaphor is similar to us to a mining that digs from underground.
.
But the mine is mine of raw data that is large.
.
This time I think about SQL order time. We will know that.
Where is the information in (Table)?
When we use select khả s̄ạ̀ng from.... where...
You can choose the information you want.
.
But if it's a treasury of raw data.
With lots of quantities like
There are a lot of websites in the internet world.
These information will be used by SQL.
Info is not separate yet.
.
And this is what we need to know.
′′ Knowledge ′′ or ′′ Knowledge ′′
Knowledge of not using Cory by SQL
Knowledge Discovery in Database - KDD)
Which is a pattern (pattern) and a relationship (associations) hidden in that data set.
.
🤔 which is the question, how can we find it?
Under raw data, there are plenty of them left.
Plus, it's hard to find, brothers?
.
So we can't escape. Let's do data mines.
What a difference to mining
Until we meet, coal tin, diamonds, gold, etc.
Oh, it takes a drilling technology to find it.
It's not a banana item.
Because it takes worth to get out of stock.
I have found a lot of rubble, rubble, and graphic. I can get full of it.
Wishlist is so little
.
Data mining as well.
Until I do the digging and digging.
I got the knowledge.
It can't be done easily. It takes a computer to do.
Algorithm needs to be automated
Handmade. I can't take it. I die.
.
For this reason, Data mining subject.
So it was born in the 1970 s.
It's a science that takes many subjects together.
Mainly subject -> Machine Learning (one branch of AI subject) + statistics wichā database
.
For the sake of Data mining
Make a knowledge search from information
It's a genius. Don't have to do it yourself.
But using a computer to automate which is very useful. Samples like.
.
- Take the risk of creditors low, middle and high level
- predict product buying behavior that customers will add something to cart
- Finding the risk of cancer patients from coronavirus infected people.
- Looking for my soulmate (I'm kidding. I don't know if anyone wants to do it for real. Haha.)
And many other benefits etc.
.
** Note **
Data mining. It has been a long time. When I wasn't famous.
Unlike Data Science which will know more in this era.
Because of the middle school boy. 5 I will be studying Data Science.
In a new course, unpacking the name ′′ Computational Science ′′
.
If compare to the work
Data analysis กับ Data science
It's a subtitle, one according to the photos posted.
The subjects are unavailable to machine learning (one branch of AI)
.
✍ Written by Thai programmer thai progammer
.
.
++++++++++++++++++++++++++++
+++++ Next, I ask for permission to sell items +++++
📔 The book ′′ Artificial Intelligence (AI) is not difficult It can be understood by the number of years. Tips (Thai language content)
.
If interested in ordering book 1, order at.
👉 https://www.mebmarket.com/web/index.php?action=BookDetails&data=YToyOntzOjc6InVzZXJfaWQiO3M6NzoiMTcyNTQ4MyI7czo3OiJib29rX2lkIjtzOjY6IjEwODI0NiI7fQ&fbclid=IwAR11zxJea0OnJy5tbfIlSxo4UQmsemh_8TuBF0ddjJQzzliMFFoFz1AtTo4
.
Sorry, no paper booklets are available. Only ebooks.
.
Personal like the book, please see this link.
👉 https://www.dropbox.com/s/fg8l38hc0k9b0md/chapter_example.pdf?dl=0
.

✍ Written by Thai programmer thai coderTranslated

Tags: sql select if

โปรแกรมเมอร์ไทย Thai programmer

About author

เพจนี้เปิดใช้งานเมื่อ 22 มิถุนายน 2014 เพจนี้เน้นหนักไป ทางการเขียนโปรแกรม คอมพิวเตอร์ และไอที ล้วน ๆ แบบฮาร์ดคอ หรือจะไร้สาระ มุกตลกขำ

ให้สาระด้านไอที คอมพิวเตอร์ และอาชีพโปรแกรมเมอร์ และสายงานด้านคอมพิวเตอร์

sql select if 在 91 敏捷開發之路 Facebook 的最佳貼文

By 91 敏捷開發之路

2017-12-24 11:50:10 有 52 人按讚

有在使用 MS SQL server 的朋友，如果有需要找到 identity 跳號的資料，可以參考一下新的寫法，查詢成本省很大。

#長知識

【SQL Tips】之【了解為何identity會發生不連續號碼與快速找出那些號碼是跳號】20171224

**identity保證唯一，不保證連續**
**使用SARG規則與SET BASED方式找出不連續號碼**
**最後那三種找出不連續的技巧，成本比如下
50%(SELF JOIN搭配NOT IN) : 32%(SELF JOIN搭配 OFFSET 函數) : 18%(LAG 函數) **

許多SQL Server開發人員經常會使用identity自動產生連續編號，然而該identity卻有一個特質是發生交易退回(rollback)則會產生跳號的狀況，以下的狀況就是identity碰到交易退回後所產生的跳號情況。

***
use tempdb
go

if object_id('tblNum') is not null
drop table tblNum
go

create table tblNum
(c1 int identity ,
c2 nvarchar(30) unique --防止重複
)
go

insert into tblNum(c2) values ('lewis1')
insert into tblNum(c2) values ('lewis2')
insert into tblNum(c2) values ('lewis3')
insert into tblNum(c2) values ('lewis3') --重複姓名就發生跳號
insert into tblNum(c2) values ('lewis5')
insert into tblNum(c2) values ('lewis5') --重複姓名就發生跳號
insert into tblNum(c2) values ('lewis5') --重複姓名就發生跳號
insert into tblNum(c2) values ('lewis8')
insert into tblNum(c2) values ('lewis9')
insert into tblNum(c2) values ('lewis10')
go

select * from tblNum
GO

--結果
c1 c2
1 lewis1
2 lewis2
3 lewis3
5 lewis5 <--發生跳號
8 lewis8 <--發生跳號
9 lewis9
10 lewis10
***

基本上單一執行INSERT UPDATE DELETE 就是一種隱性交易，上述的範例就是因為條件約束(constraint)的unique緣故，當輸入的文字發生重複的時候，就會自動退回交易，緊接著identity也隨之發生跳號的狀況。

當瞭解identity會有發生跳號的特質之後，接下來分享三種從SQL Server 2005開始使用的抓取跳號的範例，以及從SQL Server 2012開始支援的Windows Offset函數抓取跳號的技巧。這三種技巧都是使用set-based的方式，不使用WHILE迴圈去比對資料的連續性，值得一試。

**從SQL Server 2005支援的抓取跳號的技巧
--使用自我查詢產生搭配CTE
--使用SET BASED技巧取代迴圈處理

WITH DS AS (
SELECT DS1.* FROM tblNum as DS1 JOIN
tblNum as DS2
on DS1.c1 = DS2.c1+1 )
SELECT * FROM tblNum
WHERE c1 NOT IN (SELECT TOP(1) c1 FROM tblNum ORDER BY c1)
EXCEPT
SELECT * FROM DS
GO

**從SQL Server 2012支援的抓取跳號的技巧
--使用自我查詢產生搭配OFFSET
--使用SET BASED技巧取代迴圈處理
WITH DS AS (
SELECT DS1.* FROM tblNum as DS1 JOIN
tblNum as DS2
on DS1.c1 = DS2.c1+1 ),
DS2 AS (SELECT * FROM tblNum ORDER BY 1 OFFSET 1 ROW )
SELECT * FROM DS2
EXCEPT
SELECT * FROM DS
GO

**從SQL Server 2012支援的抓取跳號的技巧
--使用自我查詢產生搭配LAG的Windows Offset技巧
--使用SET BASED技巧取代迴圈處理
WITH DIFF AS (
select *,LAG(c1, 1,0) OVER ( ORDER BY c1) as previous
,c1 - LAG(c1, 1,0) OVER ( ORDER BY c1) as diff
from tblNum
)
SELECT c1,c2 FROM DIFF WHERE diff>1
GO

--結果就是 5/8 之前就發生跳號
c1 c2
5 lewis5
8 lewis8

最後那三種找出不連續的技巧，成本比如下
50%(SELF JOIN搭配NOT IN) : 32%(SELF JOIN搭配 OFFSET) : 18%(LAG)

Tags: sql select if 長知識

91 敏捷開發之路

About author

我是 Joey Chen，闖蕩江湖的稱號是 91，熱血點火師，專門燃起大家心裡面的熱情與初衷。目前為 Odd-e Taiwan 的負責人，同時也是 JetBrains 在台灣的培訓夥伴，至今也仍是熱愛學習與享受各種程式語言之美的 programmer。身為敏捷教練，擅長 Agile、Scrum、LeSS 等敏捷文化與協作框架的落實與導入，如何讓大家 being agile 而不是 doing agile。同時喜歡結合各家所長，例如 Lean, Kanban 等，重點是持續改善、解決問題、端出成果，而不執著於某種特定方法論或框架。身為技術教練，我也是極限編程（extreme programming）的狂熱者，我擅長用這些技術與工程實踐來提昇產品的品質、團隊的生產力、降低營運風險，因應市場與公司的商業目標，讓團隊能具有高適應與反應能力的基礎建設。例如實例化需求、ATDD、BDD、TDD、重構、自動化單元測試/整合測試/驗收測試、CI/CD、code review、pair programming、mob-programming 等等。同時，我也是推崇極速開發的 developer，追求從想法到產品程式碼的完成，中間的時間差能趨近於零，也就是劍隨心轉，想到哪，程式碼就長到哪的境界。從想法到實現中間的等待，其實在實務上佔了很大的 context switch 成本，如果能讓這段時間縮到最短，就能比其他人多嘗試更多種解決方案，進而挑選出最剛好的方案。同時也是技術社群的活躍份子，從 2010 年開始連任九屆的微軟 MVP，兼任 MSDN 論壇板主，也曾經獲得年度 MSDN 文件庫刊登數量世界第一的榮耀。對微軟技術有愛，對 C# 有愛，對自動測試有愛，對重構與設計模式有愛。近年來對 Java, PHP, Python 也充滿濃厚的興趣，曾帶領客戶團隊中不會寫程式的 QA ，一起用 Python 完成超過百個 mobile UI 自動化測試。擁有超過十年擔任開發團隊 tech leader, trainer, coach 與 mentor 的經驗，進行的企業內部與公開技術培訓課程已超過 100 場，培訓過的開發人員超過 1000 位，擔任研討會與社群活動的講師次數超過 30 次。同時也是技術書籍的作者與譯者，與朋友合著的書籍包含《ASP.NET MVC 5：網站開發美學》、《ASP.NET MVC 4 網站開發美學》，翻譯的書籍有《單元測試的藝術-第二版》、《敏捷開發實踐》、《進入IT產業必讀的200個 .NET面試決勝題》。如果想跟我即時互動，歡迎直接私訊或 email 至 [email protected]。

請參考：https://tdd.best/about/

sql select if 在 91 敏捷開發之路 Facebook 的最佳貼文

By 91 敏捷開發之路

2016-10-17 08:39:47 有 34 人按讚

NOT IN/NOT EXISTS/EXCEPT 使用注意事項

#SQL

【SQL Tips】之【 NULL處理技巧，使用NOT IN /NOT EXISTS/EXCEPT】

許多時候，兩個資料表要找出差異值的時候，許多人第一直覺就是使用【NOT IN】，當然大部分時候都不會有狀況，但是碰到NOT IN的子查詢資料值，如果有NULL，就全盤皆輸，意思就是找不出任何差異。這樣在小量資料可以藉由眼力觀察的狀況下，還可以找出這樣寫法NOT IN的危險地方，但是碰到背景程式，或是資料量多的時候，幾乎無法觀察到這樣危險。所以，告訴自己不要再用【NOT IN】去找出兩邊資料差異。
反倒是要使用【NOT EXISTS】寫法，雖然是複雜一點，但是跨越SQL Server與Oracle兩種資料庫，都是可以正常找出兩邊資料差異值，不擔心NOT EXISTS的基礎資料表有NULL值狀況。另外值得一提就是，需多人會直接使用SQL Server的【EXCEPT】與Oracle的【MINUS】方式，要留意再留意，這樣的方式雖然可以找出差異值，但是針對回傳值，會自動進行重複資料列移除。
【SQL Server Code】
if object_id('x') is not null
drop table x
go
--建立比對基礎資料
create table x(a int)
go
insert into x values(1)
insert into x values(1) --注意重複
insert into x values(NULL) --注意NULL
go

if object_id('y') is not null
drop table y
go

--建立簡單比對來源資料
create table y(b int not null)
go

insert into y values(1)
insert into y values(1)
insert into y values(2)
insert into y values(2)
insert into y values(2) --注意三個2

go

--三種找出y資料表中(1,1,2,2,2) 然後不存在於 x資料表中的(1,1,null)
--【預期要回傳三個2】
--第一種使用NOT IN 注意(子查詢有NULL值)
--無法處理對比資料表有NULL狀況
SELECT b
FROM y
WHERE b NOT IN(SELECT a from x)
GO

--第二種使用NOT EXISTS 注意(SELECT 需要 JOIN)
--忠實回傳三個2
SELECT b
FROM y
WHERE NOT EXISTS (SELECT * FROM x WHERE x.a = y.b)
GO

--第三種使用EXCEPT (僅回傳一個2)
SELECT b FROM y
EXCEPT
SELECT a FROM x
GO

【Oracle Code】
drop table x purge;

--建立比對基礎資料
create table x(a int);

insert into x values(1);
insert into x values(1); --注意重複
insert into x values(NULL); --注意NULL

drop table y purge;

--建立簡單比對來源資料
create table y(b int not null);

insert into y values(1);
insert into y values(1);
insert into y values(2);
insert into y values(2);
insert into y values(2); --注意三個2

--三種找出y資料表中(1,1,2,2,2) 然後不存在於 x資料表中的(1,1,null)
--第一種使用NOT IN 注意(子查詢有NULL值)
--無法處理對比資料表有NULL狀況
SELECT b
FROM y
WHERE b NOT IN(SELECT a from x);
--第二種使用NOT EXISTS 注意(SELECT 需要 JOIN)
--忠實回傳三個2
SELECT b
FROM y
WHERE NOT EXISTS (SELECT * FROM x WHERE x.a = y.b);
--第三種使用EXCEPT (僅回傳一個2)
SELECT b FROM y
MINUS
SELECT a FROM x;

Tags: sql select if SQL

91 敏捷開發之路

About author

請參考：https://tdd.best/about/

sql select if 在 prasertcbs Youtube 的最讚貼文

By prasertcbs

2020-01-29 18:32:07 有 323 人看過有 6 人喜歡

script สำหรับสร้างตาราง sales;

drop table if exists sales;

create table sales (
branch text,
dt date,
revenue int,
primary key (branch, dt)
);

insert into sales
select 'bangkok' branch, dt::date, (10000 + random() * 20000)::int revenue
from generate_series('2018-01-01'::date, '2019-12-31'::date, '1 day') dt
UNION
select 'phuket' branch, dt::date, (10000 + random() * 10000)::int revenue
from generate_series('2018-01-01'::date, '2019-12-31'::date, '1 day') dt
order by branch, dt;

ดาวน์โหลด PostgreSQL script ไฟล์ที่ใช้ในคลิปได้ที่ ► http://bit.ly/2mdDVmm

ดาวน์โหลด saturn database (saturn.tar) ได้ที่ ► http://bit.ly/2E2uY7a
เชิญสมัครเป็นสมาชิกของช่องนี้ได้ที่ ► https://www.youtube.com/subscription_center?add_user=prasertcbs

สอน PostgreSQL ► https://www.youtube.com/playlist?list=PLoTScYm9O0GGi_NqmIu43B-PsxA0wtnyH
สอน MySQL ► https://www.youtube.com/playlist?list=PLoTScYm9O0GFmJDsZipFCrY6L-0RrBYLT
สอน Microsoft SQL Server 2012, 2014, 2016, 2017 ► https://www.youtube.com/playlist?list=PLoTScYm9O0GH8gYuxpp-jqu5Blc7KbQVn
สอน SQLite ► https://www.youtube.com/playlist?list=PLoTScYm9O0GHjYJA4pfG38M5BcrWKf5s2
สอน SQL สำหรับ Data Science ► https://www.youtube.com/playlist?list=PLoTScYm9O0GGq8M6HO8xrpkaRhvEBsQhw
การเชื่อมต่อกับฐานข้อมูล (SQL Server, MySQL, SQLite) ด้วย Python ► https://www.youtube.com/playlist?list=PLoTScYm9O0GEdZtHwU3t9k3dBAlxYoq59
การใช้ Excel ในการทำงานร่วมกับกับฐานข้อมูล (SQL Server, MySQL, Access) ► https://www.youtube.com/playlist?list=PLoTScYm9O0GGA2sSqNRSXlw0OYuCfDwYk
#prasertcbs_SQL #prasertcbs #prasertcbs_PostgreSQL

prasertcbs_SQL prasertcbs prasertcbs_PostgreSQL

prasertcbs

About author

สอนการใช้งาน Excel, VBA, Macro, Word, PowerPoint, SQL, การเขียนโปรแกรมด้วยภาษาต่าง ๆ Python, PHP, Java, C, C# พร้อมตัวอย่างการประยุกต์ การทำเหมืองข้อมูล Data mining, Machine learning การใช้โปรแกรม R, ggplot2 สื่อการสอนโดย รศ.ดร. ประเสริฐ คณาวัฒนไชย คณะพาณิชศาสตร์และการบัญชี จุฬาลงกรณ์มหาวิทยาลัย Assoc.Prof. Dr. Prasert Kanawattanachai Chulalongkorn Business School

sql select if 在吳老師教學部落格 Youtube 的精選貼文

By 吳老師教學部落格

2019-04-26 20:22:16 有 257 人看過有 2 人喜歡

中央從Python程式到網路爬蟲應用第7次SQLite建立資料庫與新增資料&匯入會員資料的50個會員到資料庫中&改用format產生SQL語法與寫入資料&用executemany&&用select查詢資料表&刪除資料與自訂函數&Update修改資料&會員編號與文字關鍵字與日期查詢

上課內容：
01_重點回顧與SQLite建立資料庫與新增資料
02_修改為自動增號與迴圈自動輸入
03_匯入會員資料的50個會員到資料庫中
04_改用format產生SQL語法與寫入資料
05_改用executemany大量輸入資料
06_修改list2的第五欄資料與大量新增資料
07_用select查詢資料表
08_SQL刪除資料與自訂函數
09_Update修改資料與查詢結果
10_會員編號與文字關鍵字與日期查詢
11_全省郵局地址轉入資料庫與查詢作業說明

完整影音
http://goo.gl/aQTMFS

教學論壇(之後課程會放論壇上課學員請自行加入)：
https://groups.google.com/forum/#!forum/ncu_python_2019

懶人包：
EXCEL函數與VBA http://terry28853669.pixnet.net/blog/category/list/1384521
EXCEL VBA自動化教學 http://terry28853669.pixnet.net/blog/category/list/1384524

TQC+Python證照目錄：
Python 第1類：基本程式設計
技能內容：變數與常數、指定敘述、標準輸入輸出、運算式、算術運算子、數學函式的應用、格式化的輸出Python 第2類：選擇敘述
技能內容：if、if...else、if…elif
Python 第3類：迴圈敘述
技能內容：while、for…in
Python 第4類：進階控制流程
技能內容：常用的控制結構、條件判斷、迴圈
Python 第5類：函式(Function)
技能內容：函式使用、傳遞參數、回傳資料、內建函式、區域變數與全域變數
Python 第6類：串列(List)的運作(一維、二維以及多維)
技能內容：串列的建立、串列的函式、串列參數傳遞、串列應用
Python 第7類：數組（Tuple）、集合（Set）以及詞典（Dictionary）
技能內容：數組、集合、詞典的建立、運作及應用
Python 第8類：字串(String)的運作
技能內容：字串的建立、字串的庫存函式、字串的應用
Python 第9類：檔案與異常處理
技能內容：文字I/O、檔案的建立、寫入資料與讀取資料、二進位I/O、編碼（Encoding）、異常處理

課程簡介：入門
建置Python開發環境
基本語法與結構控制
迴圈、資料結構及函式
VBA重要函數到Python
檔案處理
資料庫處理
課程簡介：進階
網頁資料擷取與分析、Python網頁測試自動化、YouTube影片下載器
處理 Excel 試算表、處理 PDF 與 Word 文件、處理 CSV 檔和 JSON 資料
實戰：PM2.5即時監測顯示器、Email 和文字簡訊、處理影像圖片、以 GUI 自動化來控制鍵盤和滑鼠

上課用書：
參考書目
Python初學特訓班(附250分鐘影音教學/範例程式)
作者：鄧文淵/總監製, 文淵閣工作室/編著
出版社：碁峰? 出版日期：2016/11/29

吳老師 108/3/9

Python,中央大學資工系,福建師範大學,EXCEL,VBA,函數,程式設計,線上教學,PYTHON安裝環境,網路爬蟲

吳老師教學部落格

About author

吳老師AUTOCAD教學超完整懶人包先祝大家新春如意，並分享教學超完整懶人包如下， EXCEL函數與VBAhttp://terry28853669.pixnet.net/blog/category/list/1384521 EXCEL VBA自動化教學http://terry28853669.pixnet.net/blog/category/list/1384524 AUTOCAD 2D教學http://terry28853669.pixnet.net/blog/category/list/1384506 AUTOCAD 3D教學http://terry28853669.pixnet.net/blog/category/list/1384509 JAVA開發教學http://terry28853669.pixnet.net/blog/category/list/1384503 Android教學http://terry28853669.pixnet.net/blog/category/list/1384512 Android證照教學http://terry28853669.pixnet.net/blog/category/list/1384944 PhoneGap APPhttp://terry28853669.pixnet.net/blog/category/list/1384515 YOUTUBE雲端應用http://terry28853669.pixnet.net/blog/category/list/1384527 Android與iOS應用http://terry28853669.pixnet.net/blog/category/list/1384548 給想學習EXCEL VBA，提高工作效率實體開課訊息 http://www.ext.scu.edu.tw/class_0a.aspx?ClassID=1946&ClassTypeID=3&SubClassID=31 東吳大學進修推廣部： EXCEL VBA 與資料庫雲端設計(初階) EXCEL VBA 辦公室自動化(進階) 若上課時間無法配合，可以參考完整上課錄影函授DVD http://terry55wu.blogspot.tw/p/dvd.html

sql select if 在吳老師教學部落格 Youtube 的最讚貼文

By 吳老師教學部落格

2019-04-26 20:20:54 有 109 人看過有 1 人喜歡

吳老師教學部落格

About author

社群媒體上有些相關的討論：

sql select if 在 How do I perform an IF...THEN in an SQL SELECT? 的推薦與評價

... <看更多>

sql select if 在 How To use the IF… THEN ... ELSE statement In a SQL Server ... 的推薦與評價

in this tutorial, i will show you how to use conditional statement in SELECT query. ... <看更多>

sql select if 在 What's the point of WHERE 1=2 for SELECT INTO table query 的推薦與評價

I've seen this where clause in many examples on internet but not the reason why it is required. sql-server · Share. ... <看更多>

你可能也想看看

mssql select if else用法

SQL SELECT IF ELSE

SQL Server select if

THEN？ (How do I perform an IF...THEN in an SQL SELECT?) 如何在SQL SELECT 語句中執行IF...THEN？例如： SELECT IF(Obsolete = 'N' OR InStock = 'Y' ?

#2. Microsoft SQL Server 在select 中的if else 替代方式示範(iif ...

Microsoft SQL Server 在select 中的if else 替代方式示範(iif, case when) ... 在查詢語法中要使用到判斷，最好的方式不是使用IF，而是使用CASE ...

#3. How do I perform an IF...THEN in an SQL SELECT?

The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. SELECT CAST( CASE WHEN Obsolete = 'N' or InStock = 'Y' THEN 1 ...

#4. IF...ELSE (Transact-SQL) - SQL Server - Microsoft Learn

IF -ELSE 陳述式的Transact-SQL 語言參考，用於提供Transact-SQL 陳述式中的控制流程。

#5. MySQL IF() Function - W3Schools

ExampleGet your own SQL Server. Return "YES" if the condition is TRUE, or "NO" if the condition is FALSE: SELECT IF(500<1000, "YES", "NO");.

#6. SQL CASE - SQL 語法教學Tutorial - Fooish 程式技術

CASE 類似於程式語言裡的if/then/else 語句，用來作邏輯判斷。 CASE 語法(SQL CASE Syntax). CASE WHEN condition THEN result [WHEN···] [ELSE result] ...

#7. How to use SQL IF statement in SELECT? [SOLVED]

Different methods to use SQL IF statement in SELECT. In SQL IF.. THAN condition statement is used to perform different actions based on conditions defined ...

#8. SQL中的条件判断语句（case when zhen if,ifnull）用法 - 博客园

IF () 的返回值为数字值或字符串值，具体情况视其所在语境而定。复制代码. SELECT IF(sva=1,"男","女") ...

#9. SQL CASE - 1Keydata SQL 語法教學

CASE 是SQL 用來做為IF-THEN-ELSE 之類邏輯的關鍵字。 CASE 的語法如下：. SELECT CASE ("欄位名") WHEN "條件1" THEN "結果1" WHEN "條件2" THEN "結果2"

#10. How to use IF condition in SQL SELECT statement in Snowflake

In SQL Server, we have below 3 options to implement IF condition in SQL SELECT statement in Snowflake: CASE WHEN… THEN, IIF, or no-code.

#11. How to Use IF...THEN Logic in SQL Server | Tutorial by Chartio

In this example below, we want to return an additional locale column that specifies whether our book takes place in Middle-earth or regular old Earth. SELECT ...

#12. SQL Server IF…ELSE Condition Statement - Guru99

SQL Server IF…ELSE Condition Statement: T-SQL Select Query Example · IF… · If the condition evaluates to True, then T-SQL statements followed by ...

#13. SQL CASE | Intermediate SQL - Mode Analytics

This SQL tutorial for data analysis covers using if/then logic with the SQL ... SELECT player_name, year, CASE WHEN year = 'SR' THEN 'yes' ELSE NULL END AS ...

#14. How to perform an IF…THEN operation in SQL SELECT ...

In SQL Server there is an IF…ELSE control flow statement. However, it cannot be used inside a SELECT statement. The closest of IF…

#15. SQL SELECT and SELECT WHERE (With Examples)

The SQL SELECT statement is used to select (retrieve) data from a database table. In this tutorial, you will learn about the SQL SELECT statement with the ...

#16. SQL Server IF ELSE Statement By Examples

This tutorial shows you how to use the SQL Server IF. ... Note that if the Boolean expression contains a SELECT statement, you must enclose the SELECT ...

#17. How To use the IF… THEN ... ELSE statement In a SQL Server ...

in this tutorial, i will show you how to use conditional statement in SELECT query.

#18. MySQL 8.0 Reference Manual :: 13.2.13 SELECT Statement

The statement selects all rows if there is no WHERE clause. ... of column positions is deprecated because the syntax has been removed from the SQL standard.

#19. SQL IF EXISTS Decision Structure: Explained with Examples

The IF EXISTS decision structure will execute a block of SQL code only if an ... IF EXISTS ( SELECT * FROM sys.objects where name = 'vProductIncome' and ...

#20. Don't Start Your SQL Queries with the 'Select' Statement

The majority of developers start writing their SQL queries with the 'SELECT' clause, then write 'FROM', 'WHERE', 'HAVING'….and so on.

#21. SQL SELECT statement with COUNT() function - DigitalOcean

If you have any suggestions for improvements, please let us know by clicking the “report an issue“ button at the bottom of the tutorial. Hey, ...

#22. SQL: Combining the AND and OR Conditions - TechOnTheNet

The SQL AND condition and OR condition can be combined to test for multiple conditions in a SELECT, INSERT, UPDATE, or DELETE statement. When combining these ...

#23. SQL IF Statement introduction and overview - SQLShack

Syntax · The condition in SQL IF Statement should return a Boolean value to evaluate · We can specify a Select statement as well in a Boolean ...

#24. How to Write a WHERE Clause in SQL - LearnSQL.com

The WHERE clause follows the SELECT and the FROM clauses. While the SELECT clause specifies the columns to be returned from the table(s), the ...

#25. SQL SELECT Statement (Basics and Practical Examples)

In most cases, the SELECT query is run with FROM . SELECT states columns and FROM indicates a table where these columns are located. The general ...

#26. Select (SQL) - Wikipedia

The FROM clause, which indicates the table(s) to retrieve data from. · The WHERE clause includes a comparison predicate, which restricts the rows returned by the ...

#27. Using Conditional Expressions - Tutorialspoint

The SELECT statement below will display 'n/a' if an employee has been not assigned to any job yet i.e. JOB_ID ... The function is the SQL equivalence of IF.

#28. Documentation: 15: SELECT - PostgreSQL

If the LIMIT (or FETCH FIRST ) or OFFSET clause is specified, the SELECT ... (The SQL standard requires that they be Boolean constants or character strings, ...

#29. SQL WHERE IN | NOT IN - Dofactory

SQL Server WHERE IN -- the best examples. A WHERE IN clause returns values that ... SELECT * FROM Customer WHERE City IN ('Paris','London') Try it live.

#30. SQL SELECT WHERE field contains words - Edureka

I require a SELECT command which will return the following to me: SELECT * FROM Table WHERE Column1 ... All words must appear in the final ...

#31. SELECT without FROM - Modern SQL

SQL Server offers a confirming variant: values is allowed in the from clause, if the from clause assigns column names: SELECT * FROM (VALUES (1,2) , (3,4) ) ...

#32. PostgreSQL CASE

The PostgreSQL CASE expression is the same as IF/ELSE statement in other ... SELECT title, length, CASE WHEN length> 0 AND length <= 50 THEN 'Short' WHEN ...

#33. SQL SELECT Statement – How to Select Data from a Database

... with the WHERE clause. You will also learn how to use it with the ORDER BY clause. Introduction to the SQL SELECT Statement The.

#34. IF with SELECT COUNT(*) Query - IBM DB2 to Oracle Migration

In Oracle PL/ SQL you cannot use a SELECT statement in the IF statement, so you have to execute the query as a standalone statement. Oracle:

#35. SQL IF Statement for Conditional Logic

Learn how to build conditional logic when writing SQL code using IF, ... DECLARE @MSSQLTips INT = 1; IF @MSSQLTips = 0 SELECT 'There is no ...

#36. Sql server select where in list - Pragim Tech

How to use a comma separated list of values in SQL WHERE clause. At compile time, we don't know the firstnames of the employees, we only know them at ...

#37. SELECT — Presto 0.281 Documentation

Currently, the SQL for the WITH clause will be inlined anywhere the named relation is used. This means that if the relation is used more than once and the ...

#38. 自學SQL之路(四)：MySQL 最常用的4種進階語法 - Medium

“自學SQL之路(四)：MySQL 最常用的4種進階語法” is published by 林雨萱Tina in Martech 行銷 ... IF (假設條件,True,False)SELECT product_id, name, ...

#39. if condition in sql select query sql server - 稀土掘金

在SQL Server 中，使用"CASE" 关键字可以在SELECT 查询中进行条件查询。下面是一个示例： SELECT CASE WHEN age < 18 THEN 'minor' WHEN age >= 18 THEN 'adult' ELSE ...

#40. The basic T-SQL SELECT statement - Redgate Software

It is executed to retrieve columns of data from one or more tables. The SELECT statement can constrain the data returned by using the WHERE or ...

#41. sql中的IF 条件语句的用法原创 - CSDN博客

IF 表达式IF( expr1 , expr2 , expr3 )expr1 的值为TRUE，则返回值为expr2expr1 的值为FALSE，则返回值为expr3如下：SELECT IF(TRUE,1+1,1+2);-> ...

#42. [iT鐵人賽Day22]可以做好多事情的SQL子查詢 - iT 邦幫忙

進行多資料表查詢，除了使用join外，也可以使用SQL 子查詢(Subquery)，子查詢就是在一個Select指令內再放入一個Select查詢指令進行查詢，通常是位在Select的Where子句， ...

#43. SQL 查询：SELECT CASE 条件赋值 - 盖若

CASE 类型于编程中的if else，可以将查询出的值按条件翻译成指定的内容，本文将介绍case when then 的用法和使用场景。

#44. SQL CASE

Le CASE peut être utilisé dans n'importe quelle instruction ou clause, telle que SELECT, UPDATE, DELETE, WHERE, ORDER BY ou HAVING.

#45. SELECT INTO Statement in SQL - GeeksforGeeks

Both statements could be used to copy data from one table to another. But INSERT INTO SELECT could be used only if the target table exists ...

#46. SAS: How to Use IF Statement in PROC SQL - Statology

/*create new column called points_flag using case operator*/ proc sql; select *, case when points < 20 then 0 else 1 end as points_flag from ...

#47. What's the point of WHERE 1=2 for SELECT INTO table query

I've seen this where clause in many examples on internet but not the reason why it is required. sql-server · Share.

#48. SQL IF Function | BigQuery Syntax and Examples - Count.co

The IF function allows you to evaluate a boolean expression and return ... SELECT fruit, IF((fruit = 'apple'), 'It is an apple', 'It is a pear') AS ...

#49. Understanding the SQL CASE Statement and its many uses

The SELECT statement with a simple CASE expression · If the value in the [SalariedFlag] is 1, then it shows the Active Employee · For all other ...

#50. Db2 SQL - CASE expressions - IBM

WHEN search-condition THEN result-expression NULL ... If a CASE expression is in a select list that derives the final result table, and if the ...

#51. 2 Ways To Write IF THEN ELSE In SQL SELECT Query In SQL ...

In SQL server, To write if then else in SQL select query we can use SELECT CASE statement (In all versions), SELECT IIF logical function (From SQL server ...

#52. Conditional expressions | BigQuery - Google Cloud

If a CASE statement needs to distinguish a NULL value, then the alternate CASE ... SELECT A, B, CASE A WHEN 90 THEN 'red' WHEN 50 THEN 'blue' ELSE 'green'

#53. SQL SELECT statement

One of the most used SQL statements, the SELECT statement, provides the much needed ... SELECT select_list FROM source [ WHERE condition(s) ] [ GROUP BY ...

#54. sql中的IF 条件语句的用法 - 51CTO博客

那么这个IF 有啥用处呢？举个例子：查找出售价为50 的书，如果是java 书的话，就要标注为已售完. 那么对应的SQL语句该怎样去写呢？ select * ...

#55. How to Use SQL SELECT Statement to Query Data From a ...

When evaluating the SELECT statement, the database system evaluates the FROM clause first and then the SELECT clause. It's like from a table, select data from ...

#56. SELECT Statement: How to Select Specific Values - SQLCourse

Lesson 3: Selecting Data; basic use of the SELECT FROM statement and WHERE clause. From SQLCourse.com: an interactive online training course for SQL ...

#57. How CASE WHEN Works - Data School

If you try to compare incompatible types SQL will return an “Invalid Input Syntax” error. Same Data Type. SELECT Track.Name, Track.

#58. The SELECT statement - jOOQ

With jOOQ, this is as intuitive, as if using SQL directly. A more or less complete example of the "standard" SQL syntax, plus some extensions, ...

#59. SQL Between: Best Way to Retrieve Desired Range of Values

WHERE column_name BETWEEN range_start AND range_end;. The columns to be retrieved are specified in the SELECT statement. The table the columns ...

#60. Find Values That Don't Contain Numbers in SQL

In SQL Server, we can use a query like this: SELECT ProductName FROM Products WHERE ProductName NOT LIKE '%[0-9]%';.

#61. 如何在SQL SELECT中执行IF…THEN ?-问答 - 阿里云开发者社区

该语句是SQL 中最接近IF 的语句，并且在所有版本的SQL Server 上都受支持。CASE SELECT CAST( CASE WHEN Obsolete = 'N' or InStock = 'Y' THEN 1 ELSE 0 END AS bit) ...

#62. SQL COUNT() with HAVING - w3resource

The HAVING clause is used instead of WHERE clause with SQL COUNT() function. ... SELECT COUNT( * ) FROM agents HAVING COUNT(*)>3;.

#63. SQL SELECT 语句 - 菜鸟教程

SELECT 语句用于从数据库中选取数据。结果被存储在一个结果表中，称为结果集。 SQL SELECT 语法. SELECT column1, column2, ... FROM ...

#64. 如何在SELECT statement 中，實作IF-THEN-ELSE 邏輯?

How does one implement IF-THEN-ELSE logic in a SELECT statement? Submitted by admin on Sat, 2005-11-12 06:38. Oracle SQL supports several ...

#65. if function | Databricks on AWS

Learn the syntax of the if function of the SQL language in Databricks SQL and Databricks ... SQL. Copy to clipboard Copy > SELECT if(1 < 2, 'a', 'b'); a ...

#66. PL/SQL IF Statement Tutorial By Practical Examples

This tutorial shows you how to use the PL/SQL IF statement to either execute or skip a sequence of statements based on a specified condition.

#67. SQL Select Options - Ignition User Manual 7.9

Simply use the static value as a column to select, and the query will return a column where the name of the column is the static value, ...

#68. Select Where Any Column Equals (or Like) Value

All,. Is there a simple way to do a select on a table to compare any column to see if it matches a value using SQL. Suppose I have a table MyTable with the ...

#69. CASE condition & value matching in SELECT Query - Plus2net

CASE condition & value matching in SELECT Query. CASE WHERE ELSE Sql There are two different types of CASE quires. One is matching value and other one is ...

#70. SELECT — Trino 419 Documentation

Currently, the SQL for the WITH clause will be inlined anywhere the named relation ... If a select expression returns multiple columns, they are ordered the ...

#71. Selecting Value in a Set of Values with SQL IN Opeartor - zentut

The following illustrates how to use the IN operator in the SELECT statement: SELECT column1, column2,... FROM table_name WHERE (expr | column) IN (value1 , ...

#72. SELECT command - Amazon Simple Storage Service

Amazon S3 Select supports only the SELECT SQL command. The following ANSI standard clauses are supported for SELECT : SELECT list. FROM clause. WHERE clause.

#73. Advanced Query | GORM - GORM

Smart Select FieldsGORM allows selecting specific fields with Select, if you often use this ... Easier to write complicated SQL query with Group Conditions ...

#74. SQL 語法INSERT INTO SELECT FROM DUAL WHERE NOT ...

可以使用SQL 語法– INSERT INTO SELECT FROM DUAL WHERE NOT EXISTS. 如果是已存在(重覆資料) 只更新該筆資料而不是新增資料的方式.請參考.

#75. SQL Injection Cheat Sheet - Invicti

MySQL If Statement; SQL Server If Statement; If Statement SQL Injection Attack ... SELECT CASE WHEN condition THEN true-part ELSE false-part END; (P)

#76. SQL SELECT TOP, LIMIT, ROWNUM

The SQL SELECT TOP Clause ... SQL SELECT TOP Equivalent in MySQL and Oracle. MySQL Syntax ... Example. SELECT * FROM Persons WHERE ROWNUM <=5; ...

#77. sql中加入IF ELSE（CASE语句的使用）判断语句 - 365建站

标准的sql语言是不支持if 这些判断语句的，如果要加入条件，一般得用到where子句。比如，要查找customer表中的人名为'张三'的，写成sql语句为 select ...

#78. SQL条件语句(IF, CASE WHEN, IF NULL) - 肥了个大西瓜- 简书

IF. 表达式：IF( expr1 , expr2 , expr3 ). expr1条件，条件为true，则值是expr2 ，false，值就是expr3. SELECT o.id,u.account,catagory.

#79. How to Use GROUP BY and HAVING in SQL - DataCamp

... to the WHERE Clause in SQL tutorial first. You must also understand the SELECT and FROM statements, as covered in the SQL Query Examples ...

#80. HAVING clause

The HAVING clause is applied to each group of the grouped table, much as a WHERE clause is applied to a select list. If there is no GROUP BY clause, ...

#81. Arrays and Lists in SQL Server (Short version)

I frequently see people asking in SQL forums why does this not work? DECLARE @list varchar(23) = '1,2,3,4' SELECT ... FROM tbl WHERE col IN ...

#82. SQL Commands: The Complete List (w/ Examples) - Dataquest

If you're on a journey to learn SQL and you've been frustrated by the lack of ... SELECT is probably the most commonly-used SQL statement.

#83. GROUP BY and FILTER | SQL Tutorial Documentation on data ...

Though it's not required by SQL, it is advisable to include all non-aggregated columns from your SELECT clause in your GROUP BY clause. If you don't, ...

#84. Google Sheets Query function: Learn the most powerful ...

SELECT Specific Columns. What if we don't want to select every column, but only certain ones? Modify your Google Sheets QUERY function to read:.

#85. Database: Query Builder - Laravel - The PHP Framework For ...

Select Statements; Raw Expressions; Joins; Unions; Basic Where Clauses ... PDO parameter binding to protect your application against SQL injection attacks.

#86. Raw Queries - Sequelize

Will get called for every SQL query that gets sent ... SELECT }); // Note the second argument being null! // Even if we declared a callee here, the raw: ...

#87. Spark SQL, Built-in Functions

Index above array size appends the array, or prepends the array if index is negative, with 'null' elements. Examples: > SELECT array_insert(array(1, 2, 3, 4) ...

#88. Knex Query Builder

... and executing standard SQL queries, such as select , insert , update , delete . ... If using TypeScript, you can pass the type of database row as a type ...

#89. INSERT INTO SELECT vs SELECT INTO In SQL Server

The TOP clause allows you to specify the number of rows returned by the query to insert into the target table. If you use the PERCENT option, ...

#90. SQLite CASE Expression: Simple CASE & Search CASE

SELECT customerid, firstname, lastname, CASE country WHEN 'USA' THEN ... learned about SQLite CASE expression to form conditional logic inside a SQL query.

#91. Performing raw SQL queries | Django documentation

Ask on one of the support channels to see if the ORM supports your use case. ... for p in Person.objects.raw("SELECT * FROM myapp_person"): ... print(p) .

#92. Select using Query Builder - typeorm - GitBook

getRepository(User) .createQueryBuilder("user") .where("user.id = :id", { id: 1 }) .getOne(). It builds the following SQL query: SELECT. user.id as userId,.

#93. MySQL IF Statement

The IF-THEN statement allows you to execute a set of SQL statements based on a ... SELECT creditLimit INTO credit FROM customers WHERE customerNumber ...

#94. SQL Cheat Sheet and Query Syntax - Sisense

If you are new to SQL programming, here is a handy reference guide for character ... select * from users outer join groups on users.group_id(+) = groups.id ...

#95. SQL Clauses and Its Types - Syntax and Example (Part-2)

What are the different SQL Clauses - WHERE Clause, GROUP BY Claues, HAVING Clause, ... Select clause is used to query the database and display the output.

#96. Query Language Reference (Version 0.7) | Charts

setQuery('select dept, sum(salary) group by dept'); ... If you're familiar with SQL, it shouldn't be too hard to learn. Data Tables.

#97. Comment écrire une boucle conditionnelle IF...THEN ... - JDN

Il est possible de faire une condition sur requête SELECT en SQL grâce à l'instruction CASE. Cette instruction permet de spécifier des ...

#98. Find where specific table or view is used in SQL Server ...

Do table names in your database always make sense? Honestly. Yeah, ours neither. See what we did about that. Learn now. Query. select ...

關於 sql select if ，我們在網路上蒐集到這些相關的討論、資訊與評價

「sql select if」的推薦目錄：

sql select if 在 โปรแกรมเมอร์ไทย Thai programmer Facebook 的最佳解答

About author

sql select if 在 91 敏捷開發之路 Facebook 的最佳貼文

About author

sql select if 在 91 敏捷開發之路 Facebook 的最佳貼文

About author

sql select if 在 prasertcbs Youtube 的最讚貼文

About author

sql select if 在 吳老師教學部落格 Youtube 的精選貼文

About author

sql select if 在 吳老師教學部落格 Youtube 的最讚貼文

About author

你可能也想看看

搜尋相關連結

sql select if 在吳老師教學部落格 Youtube 的精選貼文

sql select if 在吳老師教學部落格 Youtube 的最讚貼文