Just remove COLUMN from ADD COLUMN ALTER TABLE Employees ADD EmployeeID numeric NOT NULL IDENTITY (1, 1) ALTER TABLE Employees ADD ... ... <看更多>
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Just remove COLUMN from ADD COLUMN ALTER TABLE Employees ADD EmployeeID numeric NOT NULL IDENTITY (1, 1) ALTER TABLE Employees ADD ... ... <看更多>
... <看更多>
ALTER TABLE is there for a reason. More seriously, unless you plan to have a really big data set, you shouldn't worry about adding new columns on demand. ... <看更多>