mysql - 无法存储输入值的日期

Question

UPDATE blogs SET start_date = '11/27/2012 00:00',end_date = '11/27/2012 00:00' WHERE id='9'

此查询不会存储博客 ID 9 的 start_date 或 end_date 值，除非我将它们设置为 varchar 类型。

尝试使用时间戳和日期时间，但查询始终会返回受影响的 0 行

问题是我需要能够在一段时间内检查行，而使用 varchar 它会变得非常复杂。

我错过了什么？

Answer 1

如 Date and Time Literals 中所述:

MySQL recognizes DATETIME and TIMESTAMP values in these formats:

• As a string in either 'YYYY-MM-DD HH:MM:SS' or 'YY-MM-DD HH:MM:SS' format. A “relaxed” syntax is permitted here, too: Any punctuation character may be used as the delimiter between date parts or time parts. For example, '2012-12-31 11:30:45', '2012^12^31 11+30+45', '2012/12/31 11*30*45', and '2012@12@31 11^30^45' are equivalent.

• As a string with no delimiters in either 'YYYYMMDDHHMMSS' or 'YYMMDDHHMMSS' format, provided that the string makes sense as a date. For example, '20070523091528' and '070523091528' are interpreted as '2007-05-23 09:15:28', but '071122129015' is illegal (it has a nonsensical minute part) and becomes '0000-00-00 00:00:00'.

• As a number in either YYYYMMDDHHMMSS or YYMMDDHHMMSS format, provided that the number makes sense as a date. For example, 19830905132800 and 830905132800 are interpreted as '1983-09-05 13:28:00'.

因此，字符串 '11/27/2012 00:00' 和 '11/27/2012 00:00' 不是有效的 MySQL 日期时间文字。您有两个选择(按照一些模糊的偏好顺序，没有任何有关您的要求的进一步信息):

1. 以可识别的格式提供您的文字:

   UPDATE blogs SET
     start_date = '2012-11-27 00:00:00',
     end_date   = '2012-11-27 00:00:00'
   WHERE id = 9
   

2. 使用 MySQL 的 STR_TO_DATE()转换字符串的函数:

   UPDATE blogs SET
     start_date = STR_TO_DATE('11/27/2012 00:00', '%m/%d/%Y %H:%i'),
     end_date   = STR_TO_DATE('11/27/2012 00:00', '%m/%d/%Y %H:%i')
   WHERE id = 9