sql-server - sql server 上的存储过程集

Question

我有选择数据的程序。

SELECT my_id FROM myDB WHERE @u_id = [u_id] 

现在我需要类似的东西：

if my_id = 1

set @anotherID = '10'

Answer 1

你的问题很模糊，我不确定你真正追求的是什么，但试试这样的事情：

--your existing code
SELECT my_id FROM myDB WHERE @u_id = [u_id] --returns a result set,
                                            -- of possibly many rows

--add this
if exists (select 1 from myDB WHERE @u_id = [u_id] AND my_id=1)
BEGIN
   SET @anotherID = '10' --hopefully you have declared this variable
                         --if @anotherID is a int/numeric data type 
                         --  you should just use: SET @anotherID = 10
                         --  notice the removed quotes
END

Answer 2

declare @my_Id int    
SELECT @my_Id = my_id FROM myDB WHERE @u_id = [u_id] 

if(@my_ID = 1)

BEGIN
set @anotherID = '10' 
END

Answer 3

声明@anotherId int

选择@anotherId =（当 my_id = 1 然后 10 时的情况，否则 @anotherId End ）

来自@u_id = [u_id]