mysql存储过程

FAQ

如何创建存储过程?

下面是一个创建存储过程的demo:

存储过程名为:p_login
存储过程有3个参数:a_platform,a_account,a_password

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CREATE DEFINER=`root`@`%` PROCEDURE `p_login`(in a_platform int,
in a_account varchar(64), in a_password varchar(32))
begin
    SELECT *,userid as uid
    FROM tb_account
    WHERE account=a_account AND
          platform=a_platform  AND
          `password`=a_password AND
          nullity = '0'  AND android = '0';
end

如何调用存储过程?

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CALL p_login(1,"aaa","password");

存储过程中常用的函数有哪些？

获取当前时间搓

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current_timestamp()

获取时间

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NOW()

获取当前日期

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curdate()

获取最后一个标识值在一条 INSERT、SELECT INTO 或大容量复制语句完成后，@@IDENTITY 中包含语句生成的最后一个标识值

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select @@IDENTITY

获取今天，昨天，前天的当前时间

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CREATE DEFINER=`root`@`%` PROCEDURE `p_demo_get_daily_login_report`(IN `a_step` int)
BEGIN
    DECLARE start_day TIMESTAMP;
    DECLARE end_day TIMESTAMP;
    # a_step=0 今天
    # a_step=1 昨天
    # a_step=2 前天
    SET start_day = (CAST(SYSDATE()AS DATE) - INTERVAL a_step DAY);
    SET end_day = (CAST(SYSDATE()AS DATE) + INTERVAL 1 DAY - INTERVAL a_step DAY);

    select a.userid,a.channel_id,b.nickname,COUNT(a.userid) as cnt
    from t_record_login as a,t_account as b
    where a.insert_date > start_day and
          a.insert_date < end_day and
          a.userid = b.userid
    group by a.userid order by cnt desc limit 10;
END