标签:style 使用 io 2014 ar art cti sql
在Oracle中,having一定要结合group by使用,但在mysql中,情况就不一样了,可以单独使用。
C:\Documents and Settings\guogang>sqlplus test/test
SQL*Plus: Release 10.2.0.1.0 - Production on 星期二 8月 12 09:09:58 2014ORA-00979: 不是 GROUP BY 表达式
SYS 30754
mysql> select * from test having id>98;
+------+-------------+
| id | create_time |
+------+-------------+
| 99 | 2014-08-12 |
| 100 | 2014-08-12 |
+------+-------------+
2 rows in set (0.00 sec)
mysql> select id,count(1) from test group by id having id>98;
+------+----------+
| id | count(1) |
+------+----------+
| 99 | 1 |
| 100 | 1 |
+------+----------+
2 rows in set (0.00 sec)
having在Oracle和mysql中的一点不同点,布布扣,bubuko.com
标签:style 使用 io 2014 ar art cti sql
原文地址:http://blog.csdn.net/stevendbaguo/article/details/38510247