本文共 893 字,大约阅读时间需要 2 分钟。
表记录:
(root@localhost) [test]> select * from t;+----+------+| id | name |+----+------+| 1 | a || 2 | A || 3 | A || 4 | B || 5 | b || 6 | c || 7 | d || 8 | e |+----+------+8 rows in set (0.00 sec)
现在查询name=a记录,并忽略大小写
(root@localhost) [test]> select name collate utf8_general_ci from t where name like 'a%';+------------------------------+| name collate utf8_general_ci |+------------------------------+| a || A || A |+------------------------------+3 rows in set (0.00 sec)
统计name字段相同记录有多少条
(root@localhost) [test]> select name,count(*) from t group by name collate utf8_general_ci DESC;+------+----------+| name | count(*) |+------+----------+| e | 1 || d | 1 || c | 1 || B | 2 || a | 3 |+------+----------+5 rows in set (0.00 sec)
转载地址:http://eiidx.baihongyu.com/