mysql資料統計技巧備忘錄

　　mysql 作為常用資料庫，操作賊六是必須的，對于數字操作相關的東西，那是相當友善，本節就來拎幾個統計案例出來供參考！

order訂單表,樣例如下：

CREATE TABLE `t_order` (
　　`id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
　　`user_id` int(11) NOT NULL,
　　`order_nid` varchar(50) NOT NULL,
　　`status` varchar(50) NOT NULL DEFAULT '0',
　　`money` decimal(20,2) NOT NULL DEFAULT '0.00',
　　`create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
　　`update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
　　PRIMARY KEY (`id`),
　　KEY `userid` (`user_id`),
　　KEY `createtime` (`create_time`),
　　KEY `updatetime` (`update_time`)
) ENGINE=InnoDB;      

1. 按天統計進單量，date_format

SELECT DATE_FORMAT(t.`create_time`, '%Y-%m-%d') t_date, COUNT(1) t_count FROM t_order t WHERE t.`create_time` > '2018-05-11' GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d');      

2. 按小時統計進單量

SELECT DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H') t_hour, COUNT(1) t_count FROM t_order t WHERE t.`create_time` > '2018-05-11' GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H');      

3. 同比昨天進單量對比，order by h, date

SELECT DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H') t_date, COUNT(1) t_count FROM t_order t WHERE t.`create_time` > '2018-05-11' GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H')
ORDER BY DATE_FORMAT(t.`create_time`, '%H'),DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H');      

4. 環比上周同小時進單，date in ，order by

SELECT DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H') t_date, COUNT(1) t_count FROM t_order t WHERE
  DATE_FORMAT(t.`create_time`,'%Y-%m-%d') IN ('2018-05-03','2018-05-11') GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H')
ORDER BY DATE_FORMAT(t.`create_time`, '%H'),DATE_FORMAT(t.`create_time`, '%Y-%m-%d %H');      

5. 按照remark字段中的傳回值進行統計，group by remark like ...

SELECT DATE_FORMAT(t.`create_time`, '%Y-%m-%d') t_date, COUNT(1) t_count, SUBSTRING_INDEX(SUBSTRING_INDEX(t.`msg`, '{', -1), '}', 1) t_rsp_msg FROM 
  cmoo_tab t WHERE t.`create_time` > '2018-05-17' AND t.`rsp_msg` LIKE '%nextProcessCode%C9000%'
  GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d'),SUBSTRING_INDEX(SUBSTRING_INDEX(t.`rsp_msg`, '{', -1), '}', 1);      

6. 統計每小時的各金額的區間數統計，sum if 1 0，各自統計

SELECT DATE_FORMAT(t.create_time,'%Y-%m-%d') t_date, SUM(IF(t.`amount`>0 AND t.`amount`<1000, 1, 0)) t_0_1000, SUM(IF(t.`amount`>1000 AND t.`amount`<5000, 1, 0)) t_1_5000,
　　SUM(IF(t.`amount`>5000, 1, 0)) t_5000m FROM t_order t WHERE t.`create_time` > '2018-05-11' GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d');      

7. 按半小時統計進單量，floor h / 30，同理10分鐘，20分鐘

SELECT  CONCAT(DATE_FORMAT(create_time, '%Y-%m-%d %H:' ),IF(FLOOR(DATE_FORMAT(create_time, '%i') / 30 ) = 0, '00','30')) AS time_scope, COUNT(*) 
FROM t_order WHERE create_time>'2018-05-11' GROUP BY time_scope ORDER BY DATE_FORMAT(create_time, '%H:%i'), DATE_FORMAT(create_time, '%Y-%m-%d') DESC ;      

8. 成功率，失敗率，臨時表 join on hour

SELECT * FROM 
 (SELECT  DATE_FORMAT(t.`create_time`, '%Y-%m-%d') t_date,COUNT(1) '成功數' FROM t_order t WHERE t.`create_time` > '2018-05-17' AND  t.`status` = 'repay_yes' GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d')) t1
  RIGHT JOIN 
 (SELECT  DATE_FORMAT(t.`create_time`, '%Y-%m-%d') t_date,COUNT(1) '總數' FROM t_order t WHERE t.`create_time` > '2018-05-11' GROUP BY DATE_FORMAT(t.`create_time`, '%Y-%m-%d')) t2 ON t1.t_date=t2.t_date;      

9. 更新日志表中最後條一條日志狀态值到資訊表中狀态，update a join b on xx set a.status=b.status where tmp group by userid tmp2，注意索引

UPDATE t_order t0 LEFT JOIN (SELECT * FROM (SELECT * FROM t_order_log t WHERE t.create_time>'2018-05-11' ORDER BY id DESC) t1
  GROUP BY t1.user_id ) ON t.user_id=t2.user_id SET t0.`status`=t2.status WHERE t0.`create_time`>'2018-05-11' AND t0.`status`=10;       

10. 備份表，create table as select xxx where xxx

CREATE TABLE t_m AS SELECT * FROM t_order;      

11. 純改備注不鎖表，快，類型全一緻

12. 動态查詢環比上周資料

SELECT DATE_FORMAT(t.create_time, '%Y-%m-%d %H') t_hour, COUNT(1) FROM `t_order` t WHERE t.`create_time` > CURDATE()
          OR (t.`create_time` > DATE_SUB(CURDATE(), INTERVAL 8 DAY) AND t.`create_time` < DATE_SUB(CURDATE(), INTERVAL 7 DAY))
     GROUP BY DATE_FORMAT(t.create_time, '%H'), DATE_FORMAT(t.create_time, '%Y-%m-%d');      

　　結果如之前環比，隻是不用每次變換日期以迎合不同的時間查詢，同理可能同比昨天的資料問題！

不要害怕今日的苦，你要相信明天，更苦！