Question

在以下示例中，我得到的所有值都大于'2009-11-29'以及NULL和'0000-00-00'。有没有其他方法可以得到相同的结果？

mysql>select * from totest;
+---------------------+
| stime               |
+---------------------+
| 0000-00-00 00:00:00 | 
| 2009-12-12 12:22:32 | 
| 0000-00-00 00:00:00 | 
| 2009-01-12 12:22:32 | 
| 0000-00-00 00:00:00 | 
| NULL                | 
+---------------------+
6 rows in set (0.00 sec)

mysql>select * from totest where If(stime!='0000-00-00', stime >= '2009-11-29', 1);
+---------------------+
| stime               |
+---------------------+
| 0000-00-00 00:00:00 | 
| 2009-12-12 12:22:32 | 
| 0000-00-00 00:00:00 | 
| 0000-00-00 00:00:00 | 
| NULL                | 
+---------------------+
5 rows in set (0.00 sec)

Answer 1

你可以尝试一下吗？

select *
from totest
where 
    stime = '0000-00-00'
    OR stime IS NULL
    OR stime < '2009-11-29'

Answer 2

选择无效日期（零日期和空）

      select * from totest 
      where stime = '0000-00-00' 
        OR stime IS NULL

仅选择大于'2009-11-29'的有效日期

      select * from totest 
      where stime != '0000-00-00' 
        AND stime IS NULL
        AND stime >= '2009-11-29'

选择无效日期

2 个答案: