MySQL 中使用正则表达式进行选择查询
mysqlmysqli database更新于 2024/8/9 16:12:17
首先我们创建一个表 −
mysql> create table DemoTable1573 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentCode varchar(20) -> ); Query OK, 0 rows affected (0.63 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1573(StudentCode) values('STU_774');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1573(StudentCode) values('909_Sam');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable1573(StudentCode) values('3_Carol_455');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable1573(StudentCode) values('David_903');
Query OK, 1 row affected (0.14 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1573;
这将产生以下输出 −
+-----------+-------------+ | StudentId | StudentCode | +-----------+-------------+ | 1 | STU_774 | | 2 | 909_Sam | | 3 | 3_Carol_455 | | 4 | David_903 | +-----------+-------------+ 4 rows in set (0.00 sec)
这是使用正则表达式实现选择查询的查询 −
mysql> select * from DemoTable1573 where StudentCode regexp '\land[0-9]';
这将产生以下输出 −
+-----------+-------------+ | StudentId | StudentCode | +-----------+-------------+ | 2 | 909_Sam | | 3 | 3_Carol_455 | +-----------+-------------+ 2 rows in set (0.14 sec)
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