Declare @sInStr varchar(1000)
Set @sInStr='''001'',''002'''
Print @sInStr
exec('select TeacherName from TB_Teacher_BaseInfo where id in ('+@sInStr+')')
Set @sInStr='''001'',''002'''
Print @sInStr
exec('select TeacherName from TB_Teacher_BaseInfo where id in ('+@sInStr+')')
Set @sInStr='''001'',''002'''
Print @sInStr
select TeacherName from TB_Teacher_BaseInfo where
charindex(','''+cast(id as varchar)+',''',','+@sInStr+',')>0
create table TB_Teacher_BaseInfo(TeacherName varchar(20))
insert into TB_Teacher_BaseInfo select '''001'''
union all select '''002'''---查询
Declare @sInStr varchar(1000)
Set @sInStr='''001'',''002'''
select
TeacherName
from TB_Teacher_BaseInfo where
charindex(','+cast(TeacherName as varchar)+',',','+@sInStr+',')>0
--结果
TeacherName
--------------------
'001'
'002'(所影响的行数为 2 行)
--删除测试环境
Drop table TeacherName
Set @sInStr='''001'',''002'''
Print @sInStr
exec SP_EXECUTESQLN'select TeacherName from TB_Teacher_BaseInfo where id in ('+@sInStr+')'
set @sInStr='''001'',''002'''
set @s='select TeacherName from TB_Teacher_BaseInfo where id in (' + @sInStr + ')'
print @sInStr
print @s
exec (@s)
2、使用Charindex函数Declare @sInStr varchar(1000)
Set @sInStr='001,002'select TeacherName
from TB_Teacher_BaseInfo
where charindex(',' + ID + ',', ',' + @sInStr + ',')>0
---------------------------------------------------------------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
========>
select TeacherName from TB_Teacher_BaseInfo where
charindex(','+id+',', ','+@sInStr+',')>0
Set @sInStr='001,002'
Print @sInStr
select TeacherName from TB_Teacher_BaseInfo where
charindex(','+id+',', ','+@sInStr+',')>0
这样写,语法检查都不过。
错误443,不能使用空白的对象或列名,如果必要,请使用一个空白