如何将查询结果存储到mysql中的变量中答案

【问题标题】：how to store the query result into a variable in mysql如何将查询结果存储到mysql中的变量中
【发布时间】：2016-08-12 14:04:38
【问题描述】：

我是 mysql 新手，我正在 phpmyadmin 中编写以下函数：

BEGIN
declare @var1 int;
declare @var2 int;

set @var1 = 0;
set @var2 = 0;

count(*) 
into @var1
from transactions 
where reg_date > DATE_SUB(CURDATE(),INTERVAL 90 DAY) 
and reg_date <= CURDATE() = last_transactions;

count(*) 
into @var2
from account 
where exp_date > CURDATE() 
AND reg_date > DATE_SUB(CURDATE(),INTERVAL 90 DAY);


return @var2/@var1;
END

我总是收到 1064 错误。提前谢谢你。

【问题讨论】：

您需要在每个查询的开头使用SELECT 关键字。
应该是SELECT COUNT(*)，而不仅仅是COUNT(*)。

标签： mysql sql stored-procedures stored-functions

【解决方案1】：

BEGIN
declare @var1 int;
declare @var2 int;

set @var1 = 0;
set @var2 = 0;

select count(*) as count into @var1  
from transactions 
where reg_date > DATE_SUB(CURDATE(),INTERVAL 90 DAY) 
and reg_date <= CURDATE() = last_transactions;

select count(*) as count into @var2
from account 
where exp_date > CURDATE() 
AND reg_date > DATE_SUB(CURDATE(),INTERVAL 90 DAY);
return @var2/@var1;
END

【讨论】：