比如 我想取出price=100或200 或300的记录, 同时要求这3个值是作为一个参数传递的:
declare @aa nchar(30)
set @aa ='100,200,300'
select * from room where price in (@aa)
上面这个写法通不过的.这个该怎么写?
declare @aa nchar(30)
set @aa ='100,200,300'
select * from room where price in (@aa)
上面这个写法通不过的.这个该怎么写?
declare @aa nchar(30)
declare @sql varchar(8000)set @aa ='100,200,300' set @sql = 'select * from room where price in (' + @aa + ')' print @sqlexec (@sql)
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,
@sql nvarchar(4000)
set @sql='select count(*) from tableName'
exec(@sql)
--如何将exec执行结果放入变量中？ declare @num int, @sql nvarchar(4000)
set @sql='select @a=count(*) from tableName '
exec sp_executesql @sql,N'@a int output',@num output
select @num
declare @aa nchar(30)
set @aa ='100,200,300' select * from room where charindex(','+rtrim(price)+',' , ','+@aa+',')>0--或者select * from room where (','+@aa+',') like ('%,'+rtrim(price)+',%')
比如 我想取出price=100或200 或300的记录, 同时要求这3个值是作为一个参数传递的:
declare @aa nchar(30)
set @aa ='100,200,300'
exec('select * from room where price in ('+''''+replace(@aa,',',''',''')+''')')
或者
where ','+rtrim(price)+',' like '%,' + @aa + '%,'
或者用patindex
或者用动态语句的in