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MySQL RegEx查找包含N个分号的行？

2024-04-30 04:39:07 454

让我们首先创建一个表-

mysql> create table DemoTable
(
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY ,
   Title text
);

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable(Title) values('This is; a; MySQL;Tutorial');
mysql> insert into DemoTable(Title) values('Java is; an;Object Oriented');
mysql> insert into DemoTable(Title) values('MongoDB ; is;a; database');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

这将产生以下输出-

+----+-----------------------------+
| Id | Title                       |
+----+-----------------------------+
|  1 | This is; a; MySQL;Tutorial  |
|  2 | Java is; an;Object Oriented |
|  3 | MongoDB ; is;a; database    |
+----+-----------------------------+
3 rows in set (0.00 sec)

这是查找包含3个分号的行的正则表达式-

mysql> select *from DemoTable where Title REGEXP '(.*;){3}';

这将产生以下输出-

+----+----------------------------+
| Id | Title                      |
+----+----------------------------+
|  1 | This is; a; MySQL;Tutorial |
|  3 | MongoDB ; is;a; database   |
+----+----------------------------+
2 rows in set (0.00 sec)

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MySQL RegEx查找包含N个分号的行？

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