zoukankan      html  css  js  c++  java
  • 一些牛逼的统计SQL

    SQL

    1.查询连续2天,每天发帖大于等于2次的用户

    SELECT
        USER_ID
    FROM
        (
            SELECT
                USER_ID,
                DATEDIFF(CREATE_TIME, '1971-01-01') - rn AS diff,
                CREATE_TIME
            FROM
                (
                    SELECT
                        USER_ID ,@r := @r + 1 AS rn,
                        CREATE_TIME
                    FROM
                        (
                            SELECT
                                COMMENT_ID,
                                USER_ID,
                                CREATE_TIME,
                                count(1)
                            FROM
                                T_SD_COMMENT t,
                                (SELECT @r := 0) r
                            GROUP BY
                                USER_ID,
                                DATE(CREATE_TIME)
                            HAVING
                                count(1) > 1
                            ORDER BY
                                USER_ID,
                                CREATE_TIME
                        ) z
                ) z
        ) z
    GROUP BY
        USER_ID ,diff
    HAVING
        MAX(DATE(CREATE_TIME)) - MIN(DATE(CREATE_TIME)) > 0

    2. 连续7天,每天都有发贴

    SELECT DISTINCT USER_ID
    FROM (SELECT MAX(date) - MIN(date) AS less, USER_ID
        FROM (SELECT date - rn AS diff, USER_ID  , date, rn
            FROM (SELECT @wy := @wy + 1 AS rn, USER_ID, datediff(CREATE_TIME, '1971-01-01') AS date, CREATE_TIME
                FROM (SELECT date(CREATE_TIME) AS CREATE_TIME, USER_ID
                    FROM T_SD_COMMENT, (SELECT @wy := 0
                        ) w
                    GROUP BY USER_ID, date(CREATE_TIME)
                    ORDER BY USER_ID, date(CREATE_TIME)
                    ) x
                ) x
            ) x
        GROUP BY diff, USER_ID
        ) x
    WHERE less >= 6  

    2. 每10钟为粒度的统计

    GROUP BY
    SUBSTR(createtime + '', 1, 11);
  • 相关阅读:
    Python内置函数(22)——list
    Git在不同环境换行符设置
    Spring之AOP
    Spring之IOC
    Spring--框架简介
    git-远程协作
    git-SSH连接配置
    git-本地操作
    git简介
    浅谈Sql各种join的用法
  • 原文地址:https://www.cnblogs.com/mjorcen/p/4026374.html
Copyright © 2011-2022 走看看