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How do comparison operators in MySQL work with date values?

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2023-09-05 15:49:10525browse

MySQL 中的比较运算符如何处理日期值?

Comparison operators between dates will work in a logical manner. In the following example, when comparing two dates, MySQL simply compares two numbers or strings -

mysql> select 20171027 < 20150825;
+---------------------------+
| 20171027 < 20150825       |
+---------------------------+
|                      0    |
+---------------------------+
1 row in set (0.00 sec)

The output 0 indicates that the result of the above query is FALSE.

mysql> select 20171027 > 20150825;
+--------------------------+
| 20171027 > 20150825      |
+--------------------------+
|                      1   |
+--------------------------+
1 row in set (0.00 sec)

Output "1" indicates that the result of the above query is TRUE.

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