使用 MySQL Regex 仅查找以数字开头的字符串?
mysqlmysqli database
要查找以数字开头的字符串，请使用正则表达式。让我们首先创建一个表 −
mysql> create table DemoTable ( Id varchar(200) ); Query OK, 0 rows affected (0.59 sec)
使用 insert 命令在表中插入记录 −
mysql> insert into DemoTable values('123User');
Query OK, 1 row affected (0.22 sec)
mysql> insert into DemoTable values('_$123User');
Query OK, 1 row affected (0.22 sec)
mysql> insert into DemoTable values('User123456');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values('0000User');
Query OK, 1 row affected (0.22 sec)
mysql> insert into DemoTable values('&^*User');
Query OK, 1 row affected (0.24 sec)
使用 select 命令显示表中的记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+------------+ | Id | +------------+ | 123User | | _$123User | | User123456 | | 0000User | | &^*User | +------------+ 5 rows in set (0.00 sec)
以下是使用 MySQL Regexp 查找以数字开头的字符串的查询 −
mysql> SELECT DISTINCT Id FROM DemoTable WHERE Id REGEXP '^[0-9]';
这将产生以下输出 −
+----------+ | Id | +----------+ | 123User | | 0000User | +----------+ 2 rows in set (0.58 sec)
