CREATE Procedure get_number
@num char(10) output
AS select Number from table; DECLARE @aa char(10);
EXEC get_number @aa OUTPUT;
SET MNumber=@aa;//??????????怎么将返回值赋值为另外一个变量啊?用的是VC
拜谢大牛了啊
@num char(10) output
AS select Number from table; DECLARE @aa char(10);
EXEC get_number @aa OUTPUT;
SET MNumber=@aa;//??????????怎么将返回值赋值为另外一个变量啊?用的是VC
拜谢大牛了啊
/******************************************************************************************************************************************************
动态语句语法:exec\sp_executesql语法整理人:中国风(Roy)日期:2008.06.06
******************************************************************************************************************************************************/
动态语句语法:--方法1查询表改为动态
select * from sysobjects
exec('select ID,Name from sysobjects')
exec sp_executesql N'select ID,Name from sysobjects'--多了一个N为unicode--方法2:字段名,表名,数据库名之类作为变量时,用动态SQL
declare @FName varchar(20)
set @FName='ID'
exec('select '+@FName+' from sysobjects where '+@FName+'=5' )
declare @s varchar(1000)
set @s=N'select '+@FName+' from sysobjects where '+@FName+'=5'
exec sp_executesql @s--会报错
declare @s nvarchar(1000)--改为nvarchar
set @s=N'select '+@FName+' from sysobjects where '+@FName+'=5'
exec sp_executesql @s--成功
--方法3:输入参数declare @i int,@s nvarchar(1000)
set @i=5
exec('select ID,Name from sysobjects where ID='+@i)set @s='select ID,Name from sysobjects where ID=@i'
exec sp_executesql @s,N'@i int',@i--此处输入参数要加上N--方法4:输出参数declare @i int,@s nvarchar(1000)
set @s='select @i=count(1) from sysobjects'--用exec
exec('declare @i int '+@s+' select @i')--把整个语句用字符串加起来执行--用sp_executesql
exec sp_executesql @s,N'@i int output',@i output--此处输出参数要加上N
select @i
--方法5:输入输出--用sp_executesql
declare @i int,@con int,@s nvarchar(1000)
set @i=5
select @s='select @con=count(1) from sysobjects where ID>@i'
exec sp_executesql @s,N'@con int output,@i int',@con output ,@i
select @con--用exec
declare @i int,@s nvarchar(1000)
set @i=5
select @s='declare @con int select @con=count(1) from sysobjects where ID>'+rtrim(@i)+' select @con'
exec(@s)
@num char(10) output
AS select Number from table; DECLARE @aa char(10);
DECLARE @bb char(10);
EXEC get_number @aa OUTPUT;
select @bb =@aa
select @bb
@num char(10) output
AS
select @num=Number from table;go
DECLARE @aa char(10);
EXEC get_number @aa=@num OUTPUT;
select @aa
@num char(10) output
AS
set @num=(select Number from table)
return @num DECLARE @aa char(10),@MNumber
EXEC get_number @aa OUTPUT;SET @MNumber=@aa;
EXEC get_number @aa = @num OUTPUT;
@num char(10) output
AS
begin
declare @sql varchar(1000)
set @sql='select @num=Number from table'
exec sp_executesql @sql,N'@num int output',@num output
end
go
DECLARE @aa char(10);
EXEC get_number @aa OUTPUT;
select @aa
EXEC SQL EXEC get_number :MNumber=@aa OUTPUT; //MNumber是在主变量那里定义的