mysql统计天、周、月、季度、半年、年

• 之前在网上搜索按时间统计，发现不是很全 ，接着别人的思路进行延伸下，
• mysql统计天、周、月、季度、半年、年

• 前期工作创建辅助表

  CREATE TABLE num (i INT);
  INSERT INTO num (i) VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);

• 创建要查询的表

  CREATE TABLE `user` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `username` varchar(32) NOT NULL COMMENT '用户名称',
    `sex` char(1) DEFAULT NULL COMMENT '性别',
    `address` varchar(256) DEFAULT NULL COMMENT '地址',
    `create_time` varchar(100) DEFAULT NULL,
    PRIMARY KEY (`id`)
  ) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8;
  
  -- ----------------------------
  -- Records of user
  -- ----------------------------
  INSERT INTO `user` VALUES ('', '小南', '男', '湖南湘潭', '2019-07-01');
  INSERT INTO `user` VALUES ('', '小谭', '男', '湖南湘潭', '2019-07-02');
  INSERT INTO `user` VALUES ('', '小梅', '女', '广东梅县', '2019-07-01');
  INSERT INTO `user` VALUES ('', '小仪', '女', '四川仪陇', '2019-05-10');
  INSERT INTO `user` VALUES ('', '小蓝', '女', '上海嘉定', '2019-11-11');
  INSERT INTO `user` VALUES ('', '小苍', '男', '湖南湘潭', '2018-06-01');
  INSERT INTO `user` VALUES ('', '小萨', '男', '湖南湘潭', '2018-01-02');
  INSERT INTO `user` VALUES ('', '小静', '女', '广东梅县', '2018-06-01');
  INSERT INTO `user` VALUES ('', '大幂幂', '女', '四川仪陇', '2019-03-10');
  INSERT INTO `user` VALUES ('', '宋小宝', '女', '上海嘉定', '2019-05-11');

• 按天统计

  SELECT
      temp.date,
      COALESCE (u.unmber, 0) 'number'
  FROM
      (
          SELECT
              adddate('2019-07-01', numlist.id) AS 'date'
          FROM
              (
                  SELECT
                      n1.i + n10.i * 10 + n100.i * 100 AS id
                  FROM
                      num n1
                  CROSS JOIN num AS n10
                  CROSS JOIN num AS n100
              ) AS numlist
          WHERE
              adddate('2019-07-01', numlist.id) < date_add('2019-07-05',INTERVAL 1 DAY)
      ) temp
  LEFT JOIN (
      SELECT
          LEFT (create_time, 10) AS udate,
          count(create_time) unmber
      FROM
          user
      WHERE
          1=1
      GROUP BY
          udate
  ) u ON temp.date = u.udate
  ORDER BY
      temp.date;

• 按周统计

  SELECT
      temp.monthWeek,
      COALESCE (plan.number, 0) 'number'
  FROM
      (
          SELECT
              YEARWEEK(
                  adddate('2019-07-01',    INTERVAL numlist.id WEEK),1    ) AS 'date',
              CONCAT(
                  MONTH (date_format('2019-07-01', '%Y-%m-%d')),'月第',    numlist.id + 1,'周') AS 'monthWeek'
          FROM
              (
                  SELECT
                      *
                  FROM
                      (
                          SELECT
                              n1.i + n10.i * 10 AS id
                          FROM
                              num n1
                          CROSS JOIN num AS n10
                      ) a
                  WHERE
                      a.id <= 11
              ) AS numlist
          WHERE
              adddate('2019-07-01',INTERVAL numlist.id WEEK    ) <= '2019-07-31'
      ) temp
  LEFT JOIN (
      SELECT
          YEARWEEK(    date_format(create_time, '%Y-%m-%d'),    1) date,
          count(    YEARWEEK(date_format(create_time, '%Y-%m-%d'),1    )    ) number
      FROM
          USER
      WHERE
          1 = 1
      AND create_time >= '2019-07-01'
      AND create_time <= '2019-07-31'
      GROUP BY
          YEARWEEK(
              date_format(create_time, '%Y-%m-%d'),
              1
          )
  ) plan ON temp.date = plan.date;

• 按月统计

  SELECT
      LEFT (temp.date, 7) monthStr,
      COALESCE (u.unmber, 0) 'number'
  FROM
      (
          SELECT
              adddate('2019-01-01',INTERVAL numlist.id MONTH    ) AS 'date'
          FROM
              (
                  SELECT
                      *
                  FROM
                      (
                          SELECT
                              n1.i + n10.i * 10 AS id
                          FROM
                              num n1
                          CROSS JOIN num AS n10
                      ) a
                  WHERE
                      a.id <= 11
              ) AS numlist
          WHERE
              adddate('2019-01-01',INTERVAL numlist.id MONTH) <= '2019-12-3'
      ) temp
  LEFT JOIN (
      SELECT
          LEFT (create_time, 7) AS udate,
          count(create_time) unmber
      FROM
          user
      WHERE
          1=1
      GROUP BY
          udate
  ) u ON LEFT (temp.date, 7) = u.udate
  ORDER BY
      temp.date

• 按季度统计

  SELECT
      temp.monthWeek,
      COALESCE(plan.number, 0) 'number'
  FROM
      (
      SELECT
      QUARTER(adddate('2019-01-01',    INTERVAL numlist.id QUARTER )) AS 'date',
          CONCAT(year(date_format('2019-01-01','%Y-%m-%d')), '年第', numlist.id +1, '季度') AS 'monthWeek'
      FROM
          (
              SELECT
                  *
              FROM
                  (
                      SELECT
                          n1.i + n10.i * 10 AS id
                      FROM
                          num n1
                      CROSS JOIN num AS n10
                  ) a
              WHERE
                  a.id <= 11
          ) AS numlist
      WHERE
          adddate('2019-01-01',INTERVAL numlist.id QUARTER) <= '2019-12-31'
  ) temp
  LEFT JOIN (
     SELECT QUARTER(date_format(create_time,'%Y-%m-%d')) date,
          count(QUARTER(date_format(create_time,'%Y-%m-%d'))) number
  FROM user
          where 1=1
          and create_time >= '2019-01-01'
          and create_time <= '2019-12-31'
          group by QUARTER(date_format(create_time,'%Y-%m-%d'))
  ) plan
  on temp.date = plan.date

• 按半年统计

  SELECT
          bannian 'content',
          COALESCE (u.unmber, 0) 'number'
          FROM
          (
              SELECT
              adddate( '2018-01-01',INTERVAL numlist.id MONTH) AS 'date',
              case DATE_FORMAT(adddate( '2018-01-01',INTERVAL numlist.id MONTH),'%c')
              when 7 then '下半年'
              when 8 then '下半年'
              when 9 then '下半年'
              when 10 then '下半年'
              when 11 then '下半年'
              when 12 then '下半年'
              else '上半年' end
              as bannian
              FROM
              (
                  SELECT * FROM(
                      SELECT
                      n1.i + n10.i * 10 AS id
                      FROM
                      num n1
                      CROSS JOIN num AS n10
                  ) a
                  WHERE a.id <= 11
              ) AS numlist
              WHERE
              adddate('2018-01-01',INTERVAL numlist.id MONTH) <=  '2018-12-31'
              GROUP BY bannian
          ) temp
          LEFT JOIN (
                  SELECT
                      case DATE_FORMAT(create_time,'%c')
                      when 7 then '下半年'
                      when 8 then '下半年'
                      when 9 then '下半年'
                      when 10 then '下半年'
                      when 11 then '下半年'
                      when 12 then '下半年'
                      else '上半年' end as udate,
                      count(create_time) unmber
                  FROM  user
                      WHERE 1=1
                      and date_format(create_time,'%Y-%m-%d') >='2018-01-01'
                      and date_format(create_time,'%Y-%m-%d') <= '2018-12-31'
                  GROUP BY udate
          ) u ON bannian = u.udate
  
  ORDER BY bannian asc;

• 按年统计（近五年）

  SELECT
      COALESCE(plan.number, 0) 'number',
      temp.date fiveYear
  FROM
      (
      SELECT
      Year(adddate('2015-01-01',    INTERVAL numlist.id Year )) AS 'date'
      FROM
          (
              SELECT
                  *
              FROM
                  (
                      SELECT
                          n1.i + n10.i * 10 AS id
                      FROM
                          num n1
                      CROSS JOIN num AS n10
                  ) a
              WHERE
                  a.id <= 11
          ) AS numlist
      WHERE
          adddate('2015-01-01',INTERVAL numlist.id Year) <= '2019-12-31'
  ) temp
  LEFT JOIN (
     SELECT Year(date_format(create_time,'%Y-%m-%d')) date,
          count(Year(date_format(create_time,'%Y-%m-%d'))) number
  FROM user
          where 1=1
          group by year(date_format(create_time,'%Y-%m-%d'))
  ) plan
  on temp.date = plan.date
  order by temp.date asc

•