Home Database Mysql Tutorial mssql存储过程表名和字段名为变量的实现方法

mssql存储过程表名和字段名为变量的实现方法

Jun 07, 2016 pm 06:03 PM
variable stored procedure

mssql存储过程表名和字段名为变量的实现方法,需要的朋友可以参考下。

没有使用动态语句直接报错

错误的
代码如下:
alter proc testpapers
as
begin
declare @tems nvarchar(max),@zidaun nvarchar(max)
set @tems=select * from @tems order by @zidaun
exec(@tems)
end
exec testpapers

消息 156,级别 15,状态 1,过程 testpapers,第 1 行
关键字 'select' 附近有语法错误。
消息 1087,级别 15,状态 2,过程 testpapers,第 1 行
必须声明表变量 "@tems"。

首先要让表名或者字段为变量则要用到动态语句

错误的
代码如下:
alter proc testpapers
as
begin
declare @tems nvarchar(max),@zidaun nvarchar(max)
set @tems='select * from @tems order by @zidaun ';
exec(@tems)
end

exec testpapers

消息 1087,级别 15,状态 2,第 1 行
必须声明表变量 "@tems"。

将表名和字段名写到exec里边

正确的
代码如下:
alter proc testpapers
as
begin
declare @startRow nvarchar(max),@tems nvarchar(max),@zidaun nvarchar(max)
set @startRow='temp'
set @tems='select * from ';
set @zidaun='p_id';
exec(@tems+@startRow+' order by '+@zidaun)
end

exec testpapers
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