设置一个带有查询返回值的变量 [英] set a variable with a return value of a query

问题描述

我的存储过程中有这样的东西，

Hi I have something like this in my store procedure,

SET @SQl = 'Some query' --this query return only a cell the type int
SET @VAR = exec(@SQL) --the varaible @var it's local and the type int

如何获取查询的返回值并设置为变量，有可能吗??或者我在做什么错了???

How can i get the return value of the query and set to the variable, it's possible?? or what I'm doing it's wrong???

感谢您的帮助

推荐答案

如果查询返回标量结果集你需要做的

If the query returns a scalar result set you need to do

DECLARE @VAR INT

DECLARE @Result TABLE
(
C INT
)

DECLARE @SQl NVARCHAR(MAX)
SET @SQl = 'SELECT 1'

INSERT INTO @Result
EXEC(@SQl)

SELECT @VAR = C FROM @Result

使用sp_executesql 和OUTPUT 参数会更好

DECLARE @VAR INT

DECLARE @SQl NVARCHAR(MAX)
SET @SQl = 'SELECT @out = 1'

EXEC sp_executesql @SQl, N'@out int output', @out = @VAR OUTPUT

SELECT @VAR 

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