我写了一个存储过程,有三个变量,检查了半天总是出错,特来请教大家: CREATE PROCEDURE [dbo].[ArchTJByTime] @treenodeid varchar(100),@StartTime datetime,@EndTime datetime AS EXEC ('select *
FROM BO_DATA_ArchiList WHERE TreeNodeSid in(' + @treenodeid + ')and(p_28 between ' + @StartTime + ' and ' + @EndTime + ')')执行结果:
USE [BambooArchives]
GODECLARE @return_value intEXEC @return_value = [dbo].[ArchTJByTime]
@treenodeid = N'7,10',
@StartTime = N'2008-7-8',
@EndTime = N'2008-7-11'SELECT 'Return Value' = @return_valueGO
错误信息:
消息 102,级别 15,状态 1,第 2 行
'8' 附近有语法错误。(1 行受影响)
FROM BO_DATA_ArchiList WHERE TreeNodeSid in(' + @treenodeid + ')and(p_28 between ' + @StartTime + ' and ' + @EndTime + ')')执行结果:
USE [BambooArchives]
GODECLARE @return_value intEXEC @return_value = [dbo].[ArchTJByTime]
@treenodeid = N'7,10',
@StartTime = N'2008-7-8',
@EndTime = N'2008-7-11'SELECT 'Return Value' = @return_valueGO
错误信息:
消息 102,级别 15,状态 1,第 2 行
'8' 附近有语法错误。(1 行受影响)
--动态sql语句基本语法
1 :普通SQL语句可以用Exec执行 eg: Select * from tableName
Exec('select * from tableName')
Exec sp_executesql N'select * from tableName' -- 请注意字符串前一定要加N 2:字段名,表名,数据库名之类作为变量时,必须用动态SQL eg:
declare @fname varchar(20)
set @fname = 'FiledName'
Select @fname from tableName -- 错误,不会提示错误,但结果为固定值FiledName,并非所要。
Exec('select ' + @fname + ' from tableName') -- 请注意 加号前后的 单引号的边上加空格 当然将字符串改成变量的形式也可
declare @fname varchar(20)
set @fname = 'FiledName' --设置字段名 declare @s varchar(1000)
set @s = 'select ' + @fname + ' from tableName'
Exec(@s) -- 成功
exec sp_executesql @s -- 此句会报错 declare @s Nvarchar(1000) -- 注意此处改为nvarchar(1000)
set @s = 'select ' + @fname + ' from tableName'
Exec(@s) -- 成功
exec sp_executesql @s -- 此句正确 3. 输出参数
declare @num int,
@sqls nvarchar(4000)
set @sqls='select count(*) from tableName'
exec(@sqls)
--如何将exec执行结果放入变量中? declare @num int,
@sqls nvarchar(4000)
set @sqls='select @a=count(*) from tableName '
exec sp_executesql @sqls,N'@a int output',@num output
select @num
AS EXEC ('select * FROM BO_DATA_ArchiList WHERE TreeNodeSid in(' + @treenodeid + ')and(p_28 between ''' + @StartTime + ''' and ''' + @EndTime + ''')')