参数 @str='88,75,85,93'语句:select * from tb_Info where Id in (@str)带入参数后执行,效果如下:
select * from tb_Info where Id in ('88,75,85,93')如何转变 @str, 带入后下效果:select * from tb_Info where Id in (88,75,85,93)
请高手帮忙!
select * from tb_Info where Id in ('88,75,85,93')如何转变 @str, 带入后下效果:select * from tb_Info where Id in (88,75,85,93)
请高手帮忙!
set @str='88,75,85,93'
select * from tb_Info where Id in ('+@str+')
declare @str varchar(100)
set @str='88,75,85,93'
set @s='select * from tb_Info where Id in ('+@str+')'
exec(@s)
set @str='88,75,85,93'
select * from tb_Info
where CHARINDEX(','+LTRIM(Id)+',',','+@str+',')>0
declare @str varchar(200)
set @str='88,75,85,93' set @str='select * from tb_Info where Id in ('+@str+')'
print @str ---查看
exec(@str) ---执行
select * from tb_Info where Id in (88,75,85,93)
declare @str varchar(100)
set @str='88,75,85,93'
select * from tb_Info where Id in (‘’‘'+@str+’‘’')
set @str='88,75,85,93'
select * from tb_Info where Id in ('+@str+')
或者 exec
DECLARE @idlist varchar(100)
SET @idlist='1,2,3'--拼接并执行动态Transact-SQL语句
EXEC('SELECT * FROM tbname WHERE fdname IN('+@idlist+')')
GO--b. 要查询的字段类型是字符型
--查询的值列表已经加上了字符串边界符
DECLARE @idlist varchar(100)
SET @idlist='''a'',''b''''a'',''c'''--拼接并执行动态Transact-SQL语句
EXEC('SELECT * FROM tbname WHERE fdname IN('+@idlist+')')
GO--查询的值列表没有字符串边界符
DECLARE @idlist varchar(100)
SET @idlist='a,b''a,c'--由于是字段类型是,所以在拼接时,必须为其加上字符串边界符(')
DECLARE @s varchar(1000)
SET @s=''''
+REPLACE(REPLACE(@idlist,'''',''''''),',',''',''')
+''''--拼接并执行动态Transact-SQL语句
EXEC('SELECT * FROM tbname WHERE fdname IN('+@s+')')
GO/*=====================================================*/
--2. 使用LIKE或者PATINDEX进行编号查询
--查询的值列表
DECLARE @idlist varchar(100)
SET @idlist='1,2,3'--查询
SELECT * FROM tbname WHERE CHARINDEX(','+RTRIM(fdname)+',',','+@idlist+',')>0
SELECT * FROM tbname WHERE PATINDEX('%,'+RTRIM(fdname)+',%',','+@idlist+',')>0
SELECT * FROM tbname WHERE ','+@idlist+',' LIKE '%,'+RTRIM(fdname)+',%'
GO/*=====================================================*/
--3. 编号查询中常见的错误
--a. 最容易犯的错误:表达式充当表达式列表。
DECLARE @s varchar(100)
SET @s='1'
SELECT id,name FROM sysobjects WHERE id IN(@s)
/*--结果
id name
---------------- ------------
1 sysobjects
--*/SET @s='1,2,3'
SELECT id,name FROM sysobjects WHERE id IN(@s)
/*--结果
服务器: 消息 245,级别 16,状态 1,行 3
将 varchar 值 '1,2,3' 转换为数据类型为 int 的列时发生语法错误。
--*/
GO--b. 生成动态Transact-SQL语句时忽略了数据类型。
DECLARE @s varchar(100)
SET @s='U,S'
EXEC('SELECT id,name FROM sysobjects WHERE id IN('+@s+')')
/*--结果:
服务器: 消息 207,级别 16,状态 3,行 1
列名 'S' 无效。
服务器: 消息 207,级别 16,状态 1,行 1
列名 'U' 无效。
--*/
GO--c. 忽略了比较的精确性问题。
--要查询的数据
DECLARE @t TABLE(col varchar(10))
INSERT @t SELECT '1'
UNION ALL SELECT '11'
UNION ALL SELECT '111'
UNION ALL SELECT '22'--查询
DECLARE @s varchar(100)
SET @s='111,22'
SELECT * FROM @t WHERE CHARINDEX(col,@s)>0
/*--结果
col
----------
1
11
111
22
-*/
GO
set @str='03,04'declare @t table(部门 char(2),部门名称 varchar(10))insert @t
select '01','aaaaa' union all
select '02','bbbbb' union all
select '03','ccccc' union all
select '04','ddddd' union all
select '05','eeeee' union all
select '06','fffff'select *
from @t
where charindex(','+部门+',',','+@str+',')>0
set @str='03,04'declare @t table(部门 char(2),部门名称 varchar(10))insert @t
select '01','aaaaa' union all
select '02','bbbbb' union all
select '03','ccccc' union all
select '04','ddddd' union all
select '05','eeeee' union all
select '06','fffff'select *
from @t
where charindex(','+部门+',',','+@str+',')>0