Declaring variable type based on a column type
In Oracle's PL-SQL, you can declare a variable and define its type based on a table column:
declare var1 table.column%TYPE;
Is it possible to do som开发者_如何学编程ething similar in MS SQL Server?
No you can't do this. The closest equivalent is User-Defined Data Types
. This will give you a layer of abstraction that may help, but it is not the same as deriving a type from a column.
It may skirt the real issue, but you can "cheat" a little bit by
Select *
INTO #tmp
From MyTable
Where 1 = 0
Will automatically create a temp table with all columns with correct data types.
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