Question

如何将Count（*）传递给@FoundFields变量？请注意，在OECompany表中有2条满足此条件的记录，但@FoundFields的输出为null： - （

--******************

declare @sql nvarchar(4000)
DECLARE @MyTable nvarchar(50);
DECLARE @SecondaryTargetField nvarchar(100)
DECLARE @FoundFields int

set @sql = N'
select 
 @FoundFields=(count(*))
from 
 sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
where 
 c.name LIKE @SecondaryTargetField 
 and t.name= @MyTable'

SET @MyTable='OECompany'
SET @SecondaryTargetField='%PRODUCTGROUP%'

PRINT @sql

EXEC sp_executesql @sql, N' @FoundFields int OUTPUT, @SecondaryTargetField VARCHAR(100), @MyTable nvarchar(50)',
@FoundFields, @SecondaryTargetField, @MyTable  

PRINT @FoundFields

Answer 1

在OUT中添加OUTPUT / { , [ @param1 = ] 'value1' [OUT|OUTPUT] [ ,...n ] }个关键字：

EXEC sp_executesql 
    @sql, 
    N' @FoundFields int OUTPUT, @SecondaryTargetField VARCHAR(100), @MyTable nvarchar(50)', 
    @FoundFields OUT, -- <-- OUT|OUTPUT Here 
    @SecondaryTargetField, 
    @MyTable

Answer 2

将OUTPUT关键字添加到要从查询返回的字段中。

    EXEC sp_executesql @sql, N' @FoundFields int OUTPUT, @SecondaryTargetField VARCHAR(100), @MyTable nvarchar(50)',
@FoundFields OUTPUT,
@SecondaryTargetField,
@MyTable

通过T-SQL将Count（*）传递给变量

2 个答案: