MySQL中的日期验证

Question

任何人都可以帮我解决MySQL如何读取我尝试执行此查询的行.

SELECT * FROM attendance where '2010-07-13 00:06:00' BETWEEN timein AND timeout;

这是表格中的日期:

+-----------------------+-----------------------+
|  timein               |  timeout              |
------------------------+------------------------
|  2010-07-13 23:44:11  |  2010-07-14 08:01:14  |
|  2010-07-12 23:40:56  |  2010-07-13 08:00:52  |   
|  2010-07-10 05:49:32  |  2010-07-10 14:00:45  |
+-----------------------+-----------------------+

正如我们在表中看到的那样,第2行应该符合日期验证,但是当我执行查询时,它不返回任何结果.如果有替代查询可以帮助任何人.

Answer 1

你的查询没问题.它应该按预期工作:

CREATE TABLE attendance (id int, timein datetime, timeout datetime);

INSERT INTO attendance VALUES (1, '2010-07-13 23:44:11', '2010-07-14 08:01:14');
INSERT INTO attendance VALUES (2, '2010-07-12 23:40:56', '2010-07-13 08:00:52');
INSERT INTO attendance VALUES (3, '2010-07-10 05:49:32',' 2010-07-10 14:00:45');

SELECT * FROM attendance where '2010-07-13 00:06:00' BETWEEN timein AND timeout;
+------+---------------------+---------------------+
| id   | timein              | timeout             |
+------+---------------------+---------------------+
|    2 | 2010-07-12 23:40:56 | 2010-07-13 08:00:52 |
+------+---------------------+---------------------+
1 row in set (0.01 sec)

你确定你timein和timeout字段类型datetime或timestamp？

更新:继@ Psytronic的建议下面的评论,如果您的字段varchar类型如下,您的示例甚至可以工作:

CREATE TABLE attendance (id int, timein varchar(100), timeout varchar(100));

INSERT INTO attendance VALUES (1, '2010-07-13 23:44:11', '2010-07-14 08:01:14');
INSERT INTO attendance VALUES (2, '2010-07-12 23:40:56', '2010-07-13 08:00:52');
INSERT INTO attendance VALUES (3, '2010-07-10 05:49:32',' 2010-07-10 14:00:45');

SELECT * FROM attendance where '2010-07-13 00:06:00' BETWEEN timein AND timeout;
+------+---------------------+---------------------+
| id   | timein              | timeout             |
+------+---------------------+---------------------+
|    2 | 2010-07-12 23:40:56 | 2010-07-13 08:00:52 |
+------+---------------------+---------------------+
1 row in set (0.00 sec)

但是你的字段不应该是varchar,因为上面将进行字符串比较而不是时间比较.