该MySql存储过程是根据用户输入的条件和排序方式查询用户的信息,排序条件调用方式:
call GetUsersDynamic(age<=30,);
/********动态查询用户的信息********/ CREATE PROCEDURE GetUsersDynamic(WhereCondition varchar(500),OrderByExpress varchar(100)) begin declare stmt varchar(2000); if LENGTH(OrderbyExpress)>0 then begin set @sqlstr=concat(select id,name,password,age,getdate(adddate) as AddDate from users where ,WhereCondition, order by ,OrderByExpress); end; else begin set @sqlstr=concat(select id,name,password,age,getdate(adddate) as AddDate from users where ,WhereCondition); end; end if; prepare stmt from @sqlstr; execute stmt; end;
getdate()是一个自定义的函数,作用是返回日期的短格式
CREATE DEFINER=`root`@`localhost` FUNCTION `getdate`($date datetime) RETURNS varchar(50) CHARSET latin1 return date_format($date,%Y-%m-%d);
动态插入数据的MySql存储过程,(注意四个单引号表示一个一引号):
CREATE DEFINER=`root`@`localhost` PROCEDURE `InsertUser`(in name2 varchar(50),in password2 varchar(32),in age2 int,in adddate2 datetime) begin DECLARE stmt varchar(2000); set @sqlstr=concat(insert into users(name,password,age,adddate) values(); set @sqlstr=concat(@sqlstr,,name2,,,,,password2,,,,age2,,,,adddate2,,)); prepare stmt from @sqlstr; execute stmt; end;