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

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

This is most easily accomplished in all versions of SQL Server using the CASE statement, which acts as a logical IF...THEN...ELSE expression and returns ...

#12. T-SQL static code analysis: Related "IF"/"ELSE IF" statements ...

Related "IF"/"ELSE IF" statements and "WHEN" clauses in a "CASE" should not have the same condition ... A CASE and a chain of IF / ELSE IF statements is evaluated ...

#13. IF statement - Db2 SQL - IBM

The IF statement executes different sets of SQL statements based on the result of search conditions.

#14. SQL IF Statement introduction and overview - SQLShack

In the following SQL IF Statement, it evaluates the expression, and if the condition is true, then it executes the statement mentioned in IF ...

#15. [MS SQL] 判斷資料庫內是否已有資料IF... ELSE

IF EXISTS(SELECT 1 FROM Prog_Stock WHERE Prog_No = '產品編號' AND Prog_Color = '顏色') UPDATE Prog_Stock S.

#16. SQL Else If Statement - Tutorial Gateway

The SQL Server else if statement handles multiple statements effectively by executing them sequentially. It will check for the first condition.

#17. SQL CASE | Intermediate SQL - Mode

The CASE statement is SQL's way of handling if/then logic. The CASE statement is followed by at least one pair of WHEN ...

#18. How do I perform an IF...THEN in an SQL SELECT? - Stack ...

The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. ... CASE statements can be embedded in other CASE statements and ...

#19. PL/SQL IF-THEN-ELSE語句 - 極客書

IF -THEN語句順序可以後跟的ELSE語句，當條件為FALSE,執行其中的可選序列。 語法: IF-THEN-ELSE語句的語法是： IF condition THEN S1 ; ELSE S2 ; END IF ; 其中，S1 ...

#20. SQL Server FAQ - FYI Center for Database Administrators

How To Use "IF ... ELSE IF ... ELSE ..." Statement Structures? "IF ... ELSE IF ... ELSE ..." statement structure is used to select one of the specified ...

#21. SQL Server IF ELSE - javatpoint

The IF statement is a part of the control flow function in SQL Server. Usually, it is a decision-making statement in various programming languages that returns ...

#22. sql-docs/if-else-transact-sql.md at live - GitHub

Transact-SQl language reference for IF-ELSE statements to provide control flow in Transact-SQL statements. 07/11/2016. sql. database-engine, sql ...

#23. 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"

#24. 9.18. 條件表示式 - PostgreSQL 正體中文使用手冊

9.18.1. CASE. SQL 中的CASE 表示式是一種通用的條件表示式，類似於其他程序語言中的if / else 語句：. 1. CASE WHEN condition THEN result. 2. [WHEN ...].

#25. 使用流程控制：IF...ELSE - iT 邦幫忙

使用流程控制：IF...ELSE. T-SQL 應用之美系列第12 篇 ... 檢查資料表是否已經存在，如果存在，就把它刪除掉IF OBJECT_ID(N'myTable', N'U') IS NOT NULL DROP TABLE ...

#26. Decision Making in PL/SQL (if-then , if-then-else, Nested if ...

if – then- else: The if statement alone tells us that if a condition is true it will execute a block of statements and if the condition is false ...

#27. Use IF ELSE Statements to Program a Stored Procedure

All the examples for this lesson are based on Microsoft SQL Server Management Studio and the sample databases AdventureWorks and ...

#28. [SQL server] IF ELSE 和CASE WHEN 的用法 - 编程猎人

[SQL server] IF ELSE 和CASE WHEN 的用法，编程猎人，网罗编程知识和经验分享，解决编程疑难杂症。

#29. PL/SQL - Nested IF-THEN-ELSE Statements - Tutorialspoint

It is always legal in PL/SQL programming to nest the IF-ELSE statements, which means you can use one IF or ELSE IF statement inside another IF or ELSE IF ...

#30. IF ELSE Statement in SQL - eduCBA

What is IF ELSE Statement in SQL? ... If condition expression evaluates to true then true case value is returned by the expression otherwise false case value will ...

#31. mybatis if else if 條件判斷SQL片段表示式取值和拼接

這裡就用到啦 if else if 判斷。 choose 標籤 中when 條件一但不成立，就會執行 otherwise 標籤中的條件，判斷語句，也就是我下面包含的sql片段條件.

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

PL/SQL IF THEN ELSE statement ... If the condition evaluates to TRUE, then the statements between THEN and ELSE execute. In case the condition evaluates to FALSE ...

#33. IF Statement

Database PL/SQL Language Reference. Contents ... ELSE. If no boolean_expression has the value TRUE , the statements after ELSE run. Examples.

#34. The IF..ELSE statements in MS SQL Server - jQuery-AZ

Let me start with a simple example of using the IF SQL statement. We will evaluate an int type variable to check its value. If the condition is TRUE, the IF ...

#35. MySQL 5.7 Reference Manual :: 13.6.5.2 IF Statement

If no search_condition matches, the ELSE clause statement_list executes. Each statement_list consists of one or more SQL statements; an empty statement_list is ...

#36. SQL Server判断语句（IF ELSE/CASE WHEN ）_喜欢生菜

SQL Server判断语句（IF ELSE/CASE WHEN ）1、IF ELSE不能用在SELECT中，只能是块，比如:IF …BEGIN…ENDELSE （注意这里没有ELSE IF，要实现只能在下面 ...

#37. sql if else用法

[SQL server] IF ELSE 和CASE WHEN 的用法2018-11-15 254 /*判斷一個數如果大於10，按10統計，如果小於0，按0統計*/ –方法a DECLARE @AA INT SET @AA=15 IF @AA>10 ...

#38. IF Statement [T-SQL] - SAP Help Portal

Provides conditional execution of a Transact-SQL statement, as an alternative to the SAP IQ IF statement.

#39. PL/pgSQL IF Statement

The if then else statement executes the statements in the if branch if the condition evaluates to true; otherwise, it executes the statements in the else branch ...

#40. Documentation: 9.1: Conditional Expressions - PostgreSQL

The SQL CASE expression is a generic conditional expression, similar to if/else statements in other programming languages: CASE WHEN condition THEN result ...

#41. sql if else 语句 - 博客园

IF ELSE 语句IF ELSE 是最基本的编程语句结构之一几乎每一种编程语言都支持这种结构而它在用于对从数据库返回的数据进行检查是非常有用的TRANSACT-SQL ...

#42. 利用彙總運算特性及HAVING子句取代IF-ELSE判斷式

方法-1: IF-ELSE. 方法-2: HAVING. SQL. --若有銷售資料(Rows>0)則寫入#Log資料表. --否則，仍需寫一筆記錄. IF (SELECT COUNT(*) FROM #Sales)>0.

#43. Using a SQL Server Case Statement for IF/Else Logic

Simple case expressions take a single input expression and then compare it for equality to a series of specific values covered by when clauses.

#44. MySQL IF Statement

This tutorial shows you how to use MySQL IF statement to execute a block of SQL code based on conditions.

#45. if...else - Sybase Infocenter

The keyword if, with or without its companion else, introduces a condition that determines whether the next statement is executed. The Transact-SQL statement ...

#46. [SQL] 依據條件取出指定欄位SELECT IF/ELSE, CASE WHEN ...

[SQL] 依據條件取出指定欄位SELECT IF/ELSE, CASE WHEN/ELSE 用法@ MySQL 5.6. 假設有一張Table 有兩個欄位： mysql> SELECT * FROM mtable;

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

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， ... SELECT MAX(CASE WHEN Field1>=Field2 THEN Field1 ELSE Field2) FROM TableName

#48. How To Avoid ELSE-IF Statement In Stored Procedure In SQL ...

How To Avoid ELSE-IF Statement In Stored Procedure In SQL Server · CREATE TABLE [dbo].[InvStockMaster]( · [StockID] [int] IDENTITY(1,1) NOT NULL, ...

#49. SQL IF THEN : Learn the Various Forms the IF-THEN Statement

IF ( condition ) THEN statement END IF;. Note that the conditionals, and other statements, are written in all caps, in SQL. With the IF statement, we first ...

#50. [SQL] INNER JOIN 條件配合IF ELSE - 伊のspace～芳香精油 ...

[SQL] INNER JOIN 條件配合IF ELSE ... AND B.bb='條件1') OR ( (A.aa IS NOT NULL) --ELSE 表格A的aa欄位是其他... AND A.aa=B.aa AND B.bb='條件2') ) WHERE .

#51. [SQL] CASE 條件式用法@ XiaoLian :: 隨意窩Xuite日誌

語法: Case when 欄位=值1 then 文字1 when 欄位=值2 then 文字2 else null End Ex:SELECT T0.[U_EmpID], T0.[firstName],Case when T0.Sex='F' then '女' when T0.

#52. Trap of SQL "else if" : 關於SQL 語法"else if" 的 ... - Lozen 's Notes

Trap of SQL "else if" : 關於SQL 語法"else if" 的陷阱. 今天在工作上看到了一段SQL 碼，大概是寫著 if @str='a' @result=@result+'aaa' else if ...

#53. How To Use IF...ELSE Statement In SQL Server - Tech-Recipes

IF …ELSE in SQL Server is used to check expression and based on the results (TRUE or FALSE) execute another SQL statements block. IF...ELSE.

#54. Conditions in SQL - IF / ELSE - Wise Owl Training

You can use the IF statement to test conditions in SQL - this blog explains how, and also explains why you might prefer to use CASE WHEN ...

#55. 使用SQL CASE 陳述式

CASE 是一個流程控制陳述式，它的作用與IF-THEN-ELSE 陳述式非常相似， ... 的資料庫，包括MySQL、MariaDB、MongoDB、SQL Server、Oracle、PostgreSQL ...

#56. IFF - Snowflake Documentation

This value is returned if the condition is not true (i.e. if it is false or NULL). Usage Notes¶. The condition can include a SELECT statement containing set ...

#57. How to perform IF statement in SQL? - Edureka

IF condition in SQL ... IF() function is passed with two parameters, one for true and other for false. The function returns one value if a ...

#58. SQL CASE works in practically all SQL-Databases - Modern ...

Before closing the case expression with end , the optional else clause can be used. The <result> of else is used if no <condition> is true.1 If else is ...

#59. [SAS] SQL 基本指令介紹part2

舉一個簡單的例子，看完後應該會感覺到有DATA STEP中IF THEN ELSE的味道。 proc sql; select name, age, weight, case when weight gt 100 then 'Heavy'/* ...

#60. IF and else IF : If « Transact SQL « SQL Server / T-SQL

IF and else IF : If « Transact SQL « SQL Server / T-SQL.

#61. SQL中的case when then else end用法- SegmentFault 思否

类似于python中的if else判断, CASE一个字段, when这个字段的值是'1'的时候返回'男', '2'返回'女'. END结束as一个标题sex.

#62. Using IF without a BEGIN and END - SQL Server Forums

If you use an IF statement in SQL code but don't use a BEGIN or and END, how does it know how much of the subsequent code to include?

#63. SQL conditional expressions - Workiva Support Center

When you enter your query in the SQL Editor or create a calculation, ... use a CASE expression, such as to enable if/else logic.

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

A CASE statement in SQL Server evaluates an expression and returns a value based on the defined conditions. Therefore, in the earlier example, ...

#65. Scripting statements | BigQuery | Google Cloud

Scripts can use variables as well as control flow statements, such as IF and ... query_statement : Represents a valid standalone SQL statement to execute.

#66. How to use if else in select statement in sql server 2008

Try with this code. SQL. Copy Code. (select case when P.Factor1=' ' then 0 else P.Factor1 end from pr.PODTL P where FkItemCode=D.FkItemCode ...

#67. 【T-SQL】在FUNCTION(資料表值函式)使用IF.....ELSE做判斷

6884; 0 · SQL. FUNCTION(資料表值函式)使用IF.....ELSE 範例. 原本就做好的一張報表，是利用FUNCTION(資料表值函式)產生資料集。然後在REPORT中顯示 ...

#68. SQL IF..ELSE..在預存程序的使用規範

SQL IF..ELSE..在預存程序的使用規範. CREATE PROCEDURE [dbo].[sp_stat_info] ( @city nvarchar(20), @town nvarchar(20), @village nvarchar(20) )

#69. Case Statement in SQL – Example Query - freeCodeCamp

If you need to add a value to a cell conditionally based on other cells, SQL's case statement is what you'll use.

#70. When to Use the SQL CASE Statement | 365 Data Science

Let's focus on the SQL CASE statement. It is used within a SELECT statement when we want to return a specific value, based on some ...

#71. SQL Server 2012 ：認識IIF 邏輯函數

使用CASE() 運算式DECLARE @c1 int =10, @c2 int = 20 SELECT CASE WHEN (@c1 < @c2) THEN N'成立' ELSE N'不成立' END N'判斷結果' GO -- 使用IIF() ...

#72. How CASE WHEN Works - The Data School

CASE WHEN in SQL operates very similarly to “if then” statements in other ... Note: CASE WHEN statements will always output new values to a new column which ...

#73. PL/SQL IF statement tips - Burleson Consulting

The IF statement can be made multiple branching by adding optional n number of ELSIF statements followed a series of conditional checks followed by an optional ...

#74. if function (Databricks SQL)

Returns expr1 if cond is true , or expr2 otherwise. In this article: Syntax; Arguments; Returns; Examples; Related functions. Syntax.

#75. 关于sql server：如何在SQL SELECT中执行IF … THEN？

case，when，else和end应该平行缩进(沿着同一条线)，只有这样才能进一步向内缩进，这对我来说最合适。 我需要嵌套的案例，却忘了我需要多个匹配的端点。

#76. SQR's – can you have a sql select inside an IF statement?

ELSE. BEGIN-SQL UPDATE <a whole wack of fields, etc.> END-SELECT. END-IF ... procedure you place your SQL SELECT statement. Thanks,

#77. Can we use IF-ELSE in Advanced SQL Query? | OutSystems

I want to fetch the records from the database based on the condition. What will be the alternative for IF-ELSE in SQL? Thanks. 0.

#78. ตอนที่ 8 : การใช้ If ....Else If...Else สร้างเงื่อนไข (SQL Server

Else... สร้างเงื่อนไข (SQL Server : Stored Procedure) ในหัวข้อนี้เราจะมาเรียนรู้การใช้งาน IF บน Stored Procedure เพราะคำสั่งนี้เป็นการสร้าง ...

#79. CASE Statement - the IF statement answer in Toad Data Point ...

CASE Statement - the IF statement answer in Toad Data Point! (Oracle/SQL Server) · 1) Click on 'Where' condition for the calculated 'New ...

#80. Conditional Statements | DB2 SQL Procedural Language

IF statements can also define a branch of execution for when a condition is not met. Another conditional statement in SQL PL is the CASE ...

#81. IF versus CASE statements – SQLServerCentral Forums

I know variable defaults assignments will only work in SQL Server 2008 and higher but what about any performance differences in these. Of course ...

#82. What is the feature in SQL for writing If/Else statements? - Quora

In SQL, we can use following features to write If/Else statements: * CASE: SQL supports CASE statements to write If/Else statements.

#83. Using CASE to Add Logic to a SELECT | LearnSQL.com

When you need to add IF-THEN logic to a SELECT statement, ... As you write an SQL query, you may need to get values from multiple columns ...

#84. Case And If Else Statement In Sql Server - DZone Database

DECLARE @MyVal INT DECLARE @OUTPUTValues VARCHAR(200) SET @MyVal = 1 SELECT @OUTPUTValues = ( CASE @MyVal WHEN 1 THEN 'test1' WHEN 2 THEN ...

#85. SQL IF ELSE Statement. ELSE not running - SQL Server Forum

I have an import which I import into a staging table called stg.HandlerDirectory. Columns are ClaimHandler and TeamTrayN... | Microsoft SQL ...

#86. SQL SERVER – How to use 'if… else' in 'where' clause

IF... ELSE clause is very handy and whenever you need to perform any conditional operation, you can achieve your results using it.

#87. T-SQL Programming Part 1 - Defining Variables, and IF...ELSE ...

To test for a true or false condition in an IF statement; To programmatically control conditions in a WHERE statement. In SQL Server a variable ...

#88. Conditional Expressions — Presto 0.265.1 Documentation

The standard SQL CASE expression has two forms. ... If no match is found, the result from the ELSE clause is returned if it exists, otherwise null is ...

#89. 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 ...

#90. Using WITH in an IF Condition - Simple Talk - Redgate Software

If you have used a CTE in your query, this can sometimes be ... Instead, you can use the SQL statement to assign a value to a variable.

#91. The SQL Procedure : CASE expression - SAS OnlineDoc, V8

If every when-condition is false, PROC SQL executes the ELSE expression, and its result becomes the CASE expression's result. If no ELSE expression is ...

#92. Supported PL/pgSQL statements - Amazon Redshift - AWS ...

A no-op statement can indicate that one branch of an IF-THEN-ELSE chain is empty. NULL;. Dynamic SQL. To ...

#93. if statement in sql Code Example

“if statement in sql” Code Answer's. if inside select mysql. sql by GutoTrosla on Apr 30 2020 Donate Comment. 2. SELECT IF(1>3,'true','false');. xxxxxxxxxx.

#94. Lệnh IF...ELSE trong SQL Server - QuanTriMang.com

Trong SQL Server, câu lệnh IF...ELSE dùng để thực thi các lệnh có điều kiện, nếu lệnh đúng thì thực thi lệnh đó, nếu sai sẽ thực thi một lệnh khác. Cú pháp sử ...

#95. PL/SQL - 基本用法判斷式, 迴圈 - 限量ㄟ蓋步

在Programming界中有一句話深刻的描述了程式語言的特性： "不論使用哪一種程式語言，只要你會IF ELSE與WHILE就能打遍天下"，

#96. IF Statements - Oracle PL/SQL Programming, 5th Edition [Book]

IF Statements The IF statement allows you to implement conditional branching logic in your programs. With it, you'll be able to implement requirements such ...

#97. Common Alternatives to IF ELSE Logic in SQL Server with ...

The main use of CASE Expression returns a value based on one or more conditions. We can use CASE Expression anywhere in a SQL statement where an ...