create PROCEDURE [dbo].[usp_test] (@Column varchar (5)) AS BEGIN select * from tb where charindex(','+col+',',','+@column+',')>0 end
按如下方式改.declare @Column as varchar(10) set @Column = 'a , b' set @Column = '''' + replace(@column , ',' , ''',''') + ''''print @column/* 'a ',' b' */
create PROCEDURE [dbo].[usp_test] (@Column varchar (5)) AS BEGIN DECLARE @strSQL varchar(8000) set @strSQL = @strSQL +'Select * from Table where charindex(','+Column+',',','+@Column+',')>0' exec(@strSQL) end 程写执行 => Exec usp_ test 'a,b'
create PROCEDURE [dbo].[usp_test] (@Column varchar (5)) AS BEGIN DECLARE @strSQL varchar(8000) select * from Table where charindex(','+Column+',',','+@Column+',')>0
end
declare @Column as varchar(10) set @Column = 'a , b' set @Column = '''' + replace(@column , ',' , ''',''') + '''' declare @sql as varchar(100) set @sql = 'Select * from Table where Column in (' + @Column + ')' print @sql/* Select * from Table where Column in ('a ',' b') */
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
(@Column varchar (5))
AS
BEGIN
select * from tb where charindex(','+col+',',','+@column+',')>0
end
set @Column = 'a , b'
set @Column = '''' + replace(@column , ',' , ''',''') + ''''print @column/*
'a ',' b'
*/
(@Column varchar (5))
AS
BEGIN
DECLARE @strSQL varchar(8000)
set @strSQL = @strSQL +'Select * from Table where charindex(','+Column+',',','+@Column+',')>0'
exec(@strSQL)
end
程写执行 => Exec usp_ test 'a,b'
(@Column varchar (5))
AS
BEGIN
DECLARE @strSQL varchar(8000)
select * from Table where charindex(','+Column+',',','+@Column+',')>0
end
set @Column = 'a , b'
set @Column = '''' + replace(@column , ',' , ''',''') + ''''
declare @sql as varchar(100)
set @sql = 'Select * from Table where Column in (' + @Column + ')'
print @sql/*
Select * from Table where Column in ('a ',' b')
*/
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