我有两个 简单的存储过程可不知道为什么会这样
第一个
CREATE PROCEDURE lanchina_person_manage
as
select bm_yuangong.*,
case bm_yuangong.Person_zhuangtai
WHEN 0 THEN '离职 '
WHEN 1 THEN '试用在职 '
WHEN 2 THEN '正式在职 '
end as Person_zhuangtai1
from bm_yuangong
where Person_zhuangtai <> '0 '
order by person_id desc
GO
可以正常使用
我在查询里 同样使用了类似的存储过程
是这样写的
CREATE PROCEDURE lanchina_person_managetwo
@new_select varchar(50),
@new_key varchar(50)
as
select bm_yuangong.*,
case bm_yuangong.Person_zhuangtai
WHEN 0 THEN '离职 '
WHEN 1 THEN '试用在职 '
WHEN 2 THEN '正式在职 '
end as Person_zhuangtai1
from bm_yuangong
where '+@new_select+ ' like "% '+@new_key+ '% " and Person_zhuangtai <> '0 '
order by person_id desc
GO
这第二个 没有语法错误 却怎么都查询不出借过 请问这是为什么 谢谢大家 急急急！！！
[解决办法]
这样改一下第二个存储过程:
CREATE PROCEDURE lanchina_person_managetwo
@new_select varchar(50),
@new_key varchar(50)
as
declare @sql varchar(8000)
set @sql = '
select bm_yuangong.*,
case bm_yuangong.Person_zhuangtai
WHEN 0 THEN ' '离职 ' '
WHEN 1 THEN ' '试用在职 ' '
WHEN 2 THEN ' '正式在职 ' '
end as Person_zhuangtai1
from bm_yuangong
where '+@new_select+ ' like ' '% '+@new_key+ '% ' ' and Person_zhuangtai <> ' '0 ' '
order by person_id desc '
EXEC(@sql)
GO
[解决办法]
--用动态SQL
CREATE PROCEDURE lanchina_person_managetwo
@new_select varchar(50),
@new_key varchar(50)
as
declare @sql varchar(8000)
set @sql = '
select bm_yuangong.*,
case bm_yuangong.Person_zhuangtai
WHEN 0 THEN ' '离职 ' '
WHEN 1 THEN ' '试用在职 ' '
WHEN 2 THEN ' '正式在职 ' '
end as Person_zhuangtai1
from bm_yuangong
where '+@new_select+ ' like ' '% '+@new_key+ '% ' ' and Person_zhuangtai <> ' '0 ' '
order by person_id desc '
print @sql
exec (@sql)
GO
[解决办法]
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
