MySQL 选择上周的数据答案

【问题标题】：MySQL select data from last weekMySQL 选择上周的数据
【发布时间】：2014-01-09 08:08:32
【问题描述】：

我想知道如何选择上周的所有数据？周一到周五之间，假设今天是周一。我实际上没有日期时间格式列。

到目前为止，这是我尝试过的：

SELECT * FROM logs
WHERE WEEKDAY(CONCAT(year,'-',month,'-',day)) BETWEEN 0 AND 4 
AND YEARWEEK( date_added2 ) = YEARWEEK( CURRENT_DATE( ) - INTERVAL 7 DAY) AND deleted='n';

这是我的表格，表格日志：

【问题讨论】：

标签： mysql

【解决方案1】：

你能试试这个吗？你可以在这里测试http://www.sqlfiddle.com/#!2/3989b1/3/0

SELECT *
FROM logs,
  (SELECT (CURRENT_DATE() - INTERVAL (WEEKDAY(CURRENT_DATE()) + 1 ) % 7 DAY) AS sun_day) t1
WHERE
    logs.date_added2 BETWEEN t1.sun_day - INTERVAL 6 DAY 
        AND t1.sun_day - INTERVAL 2 DAY;

工作原理

后续查询返回星期几

SELECT '2014-01-09' - INTERVAL (WEEKDAY('2014-01-09') + 1 ) % 7 DAY;
+--------------------------------------------------------------+
| '2014-01-09' - INTERVAL (WEEKDAY('2014-01-09') + 1 ) % 7 DAY |
+--------------------------------------------------------------+
| 2014-01-05                                                   |
+--------------------------------------------------------------+

SELECT '2014-01-10' - INTERVAL (WEEKDAY('2014-01-10') + 1 ) % 7 DAY;
+--------------------------------------------------------------+
| '2014-01-10' - INTERVAL (WEEKDAY('2014-01-10') + 1 ) % 7 DAY |
+--------------------------------------------------------------+
| 2014-01-05                                                   |
+--------------------------------------------------------------+

所以，t1.sun_day - INTERVAL 6 代表前一周的星期一，t1.sun_day - INTERVAL 2 DAY 代表前一周的星期五。

mysql> SELECT @sunday := (CURRENT_DATE() - INTERVAL (WEEKDAY(CURRENT_DATE()) + 1 ) % 7 DAY) AS sunday;
+------------+
| sunday     |
+------------+
| 2014-01-05 |
+------------+

mysql> SELECT @sunday - INTERVAL 6 DAY, @sunday -  INTERVAL 2 DAY;
+--------------------------+---------------------------+
| @sunday - INTERVAL 6 DAY | @sunday -  INTERVAL 2 DAY |
+--------------------------+---------------------------+
| 2013-12-30               | 2014-01-03                |
+--------------------------+---------------------------+

所以，logs.date_added2 BETWEEN t1.sun_day - INTERVAL 6 DAY AND t1.sun_day - INTERVAL 2 DAY 会查找周一到周五的日志。

【讨论】：