MySQL 通配符学习小结.pdf

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MySQL 通配符学****小结
分类: SQL Index 2010-01-04 16:48 933人阅读评论(0) 收藏举报
MySQL 通配符
 
SQL的模式匹配允许你使用“_”匹配任何单个字符,而“%”匹配任意数目字符(包括零个字符)。在 MySQL中,SQL
的模式缺省是忽略大小写的。下面显示一些例子。
注意在你使用SQL模式时,你不能使用=或!=;而使用LIKE或NOT LIKE比较操作符。
 
为了找出以“b”开头的名字:
mysql> SELECT * FROM pet WHERE name LIKE "b%";
+--------+--------+---------+------+------------+------------+
| name | owner | species | sex | birth | death |
+--------+--------+---------+------+------------+------------+
| Buffy | Harold | dog | f | 1989-05-13 | NULL |
| Bowser | Diane | dog | m | 1989-08-31 | 1995-07-29 |
+--------+--------+---------+------+------------+------------+
 
为了找出以“fy”结尾的名字:
mysql> SELECT * FROM pet WHERE name LIKE "%fy";
+--------+--------+---------+------+------------+-------+
| name | owner | species | sex | birth | death |
+--------+--------+---------+------+------------+-------+
| Fluffy | Harold | cat | f | 1993-02-04 | NULL |
| Buffy | Harold | dog | f | 1989-05-13 | NULL |
+--------+--------+---------+------+------------+-------+
 
为了找出包含一个“w”的名字:
mysql> SELECT * FROM pet WHERE name LIKE "%w%";
+----------+-------+---------+------+------------+------------+
| name | owner | species | sex | birth | death |
+----------+-------+---------+------+------------+------------+
| Claws | Gwen | cat | m | 1994-03-17 | NULL |
| Bowser | Diane | d