Question

这对大多数人来说可能是微不足道的，但我并没有长时间编写存储过程（仅限6个月）。我希望能够根据用于INSERT查询的其中一列设置变量@testid。我怎么能这样做？

DECLARE @testid INT;

INSERT INTO [exporttestresultreport] (
    [testid],
    [othercolumn]
) 
SELECT
    [testid],  -- <======= how can I set my variable based on this column?
    [othercolumn]
FROM 
    [exporttestresultreport] e
WHERE 
    [exporttestresultreportid] = @exporttestresultreportid

Answer 1

DECLARE @testid INT;

DECLARE @test TABLE (testid int);

INSERT INTO [exporttestresultreport] (
    [testid],
    [othercolumn]
) 
OUTPUT INSERTED.testID INTO @test
SELECT
    [testid],  -- <======= how can I set my variable based on this column?
    [othercolumn]
FROM 
    [exporttestresultreport] e
WHERE 
    [exporttestresultreportid] = @exporttestresultreportid;

SELECT @testid = testid FROM @test;

INSERT..SELECT ..本质上是多行的，因此允许为标量变量赋值是没有意义的：值应该用于哪一行？

Answer 2

DECLARE @testid INT;

DECLARE @t TABLE(t INT);

INSERT exporttestresultreport
(
    testid, othercolumn
)
OUTPUT INSERTED.testid INTO @t
SELECT testid, othercolumn 
FROM 
    [exporttestresultreport] e
WHERE 
    [exporttestresultreportid] = @exporttestresultreportid;

SELECT @testid = t FROM @t;

-- not sure what you want to do if there are multiple rows in the insert

从INSERT查询FROM子句结果列存储SQL变量

2 个答案: