下文介绍的MySql存储过程是带参数的存储过程(动态执行SQL语句)，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，排序条件可以没有调用方式：

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

beginhttps://www.weixiu3721.com

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;

标签：存储,set,varchar,SQL,stmt,MySql,end,sqlstr

来源： https://www.cnblogs.com/zqw111/p/12929201.html