LIKE 操作符用于在 WHERE 子句中搜索列中的指定模式。
LIKE 操作符
LIKE 操作符用于在 WHERE 子句中搜索列中的指定模式。
SQL LIKE 操作符语法
SELECT column_name(s) FROM table_name WHERE column_name LIKE pattern
提示:"%" 可用于定义通配符(模式中缺少的字母)
现在,我们希望从上面的 "Persons" 表中选取居住在以 "Lon" 开始的城市里的人:
mysql> SELECT * FROM Persons where City like 'Lon%';
+------+----------+-----------+---------------+--------+
| Id_P | LastName | FirstName | Address | City |
+------+----------+-----------+---------------+--------+
| 1 | Adams | John | Oxford Street | London |
+------+----------+-----------+---------------+--------+
1 row in set (0.10 sec)
通过使用 NOT 关键字,我们可以从 "Persons" 表中选取居住在不包含 "lon" 的城市里的人:
mysql> SELECT * FROM Persons where City not like 'Lon%';
+------+----------+-----------+--------------+----------------+
| Id_P | LastName | FirstName | Address | City |
+------+----------+-----------+--------------+----------------+
| 2 | Bush | George | Fifth Avenue | New York |
| 3 | Bush | Carter | Thomas | Changan Street |
+------+----------+-----------+--------------+----------------+
2 rows in set (0.00 sec)