使用 OUTPUT 参数 OUTPUT 参数允许外部过程、批处理或多条 Transact-SQL 语句访问在过程执行期间设置的某个值。下面的示例创建一个存储过程 (titles_sum),并使用一个可选的输入参数和一个输出参数。首先,创建过程:USE pubs GO IF EXISTS(SELECT name FROM sysobjects WHERE name = 'titles_sum' AND type = 'P') DROP PROCEDURE titles_sum GO USE pubs GO CREATE PROCEDURE titles_sum @@TITLE varchar(40) = '%', @@SUM money OUTPUT AS SELECT 'Title Name' = title FROM titles WHERE title LIKE @@TITLE SELECT @@SUM = SUM(price) FROM titles WHERE title LIKE @@TITLE GO接下来,将该 OUTPUT 参数用于控制流语言。 说明 OUTPUT 变量必须在创建表和使用该变量时都进行定义。 参数名和变量名不一定要匹配,不过数据类型和参数位置必须匹配(除非使用 @@SUM = variable 形式)。 DECLARE @@TOTALCOST money EXECUTE titles_sum 'The%', @@TOTALCOST OUTPUT IF @@TOTALCOST < 200 BEGIN PRINT ' ' PRINT 'All of these titles can be purchased for less than $200.' END ELSE SELECT 'The total cost of these titles is $' + RTRIM(CAST(@@TOTALCOST AS varchar(20)))下面是结果集:Title Name ------------------------------------------------------------------------ The Busy Executive's Database Guide The Gourmet Microwave The Psychology of Computer Cooking(3 row(s) affected)Warning, null value eliminated from aggregate.
All of these titles can be purchased for less than $200.
set @s='select 'M' as M' select @s=@s+',['+STName+']=sum(case when STName='''+STName+''' then 1 else 0 end)' from Ta set @s=@s+' from Ta group by T order by T' exec(@s)
set @s='select 'M' as M' select @s=@s+',['+STName+']=sum(case when STName='''+STName+''' then 1 else 0 end)' from Ta set @s=@s+' from Ta group by T order by T' exec(@s)直接在查询分析器执行这些代码是可以返回记录集的,但放到存储过程Paa,然后再exec Paa 't'就不返回了
set @s=@s+' from Ta group by T order by T' --exec(@s) print @s---print一下@s,查看这个要被动态执行的语句 然后,把这个语句单独在查询分析其中执行一下,看看是不是出现的预想的结果。
明白了,你需要把结果插入到临时表(或临时使用的表中,用完后删除.)然后从临时表中取数据.set @s='select 'M' as M' select @s=@s+',['+STName+']=sum(case when STName='''+STName+''' then 1 else 0 end)' from Ta set @s=@s+' into tmp from Ta group by T order by T' exec(@s)select * from tmp
OUTPUT 参数允许外部过程、批处理或多条 Transact-SQL 语句访问在过程执行期间设置的某个值。下面的示例创建一个存储过程 (titles_sum),并使用一个可选的输入参数和一个输出参数。首先,创建过程:USE pubs
GO
IF EXISTS(SELECT name FROM sysobjects
WHERE name = 'titles_sum' AND type = 'P')
DROP PROCEDURE titles_sum
GO
USE pubs
GO
CREATE PROCEDURE titles_sum @@TITLE varchar(40) = '%', @@SUM money OUTPUT
AS
SELECT 'Title Name' = title
FROM titles
WHERE title LIKE @@TITLE
SELECT @@SUM = SUM(price)
FROM titles
WHERE title LIKE @@TITLE
GO接下来,将该 OUTPUT 参数用于控制流语言。 说明 OUTPUT 变量必须在创建表和使用该变量时都进行定义。
参数名和变量名不一定要匹配,不过数据类型和参数位置必须匹配(除非使用 @@SUM = variable 形式)。 DECLARE @@TOTALCOST money
EXECUTE titles_sum 'The%', @@TOTALCOST OUTPUT
IF @@TOTALCOST < 200
BEGIN
PRINT ' '
PRINT 'All of these titles can be purchased for less than $200.'
END
ELSE
SELECT 'The total cost of these titles is $'
+ RTRIM(CAST(@@TOTALCOST AS varchar(20)))下面是结果集:Title Name
------------------------------------------------------------------------
The Busy Executive's Database Guide
The Gourmet Microwave
The Psychology of Computer Cooking(3 row(s) affected)Warning, null value eliminated from aggregate.
All of these titles can be purchased for less than $200.
set @s='select 'M' as M'
select @s=@s+',['+STName+']=sum(case when STName='''+STName+''' then 1 else 0 end)'
from Ta
set @s=@s+' from Ta group by T order by T'
exec(@s)
select @s=@s+',['+STName+']=sum(case when STName='''+STName+''' then 1 else 0 end)'
from Ta
set @s=@s+' from Ta group by T order by T'
exec(@s)直接在查询分析器执行这些代码是可以返回记录集的,但放到存储过程Paa,然后再exec Paa 't'就不返回了
set @s=@s+' from Ta group by T order by T'
--exec(@s)
print @s---print一下@s,查看这个要被动态执行的语句
然后,把这个语句单独在查询分析其中执行一下,看看是不是出现的预想的结果。
select @s=@s+',['+STName+']=sum(case when STName='''+STName+''' then 1 else 0 end)'
from Ta
set @s=@s+' into tmp from Ta group by T order by T'
exec(@s)select * from tmp