MySQL查询仅检索具有特殊字符的列值?
为此,请使用REGEXP。让我们首先创建一个表-
mysql> create table DemoTable(SubjectCode varchar(100));
使用insert命令在表中插入一些记录。记录由文本,数字和特殊字符组成-
mysql> insert into DemoTable values('Java899@22'); mysql> insert into DemoTable values('C#'); mysql> insert into DemoTable values('~Python232'); mysql> insert into DemoTable values('MongoDB%'); mysql> insert into DemoTable values('C123456');
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-
+-------------+ | SubjectCode | +-------------+ | Java899@22 | | C# | | ~Python232 | | MongoDB% | | C123456 | +-------------+ 5 rows in set (0.00 sec)
以下是获取所有带有特殊字符的值的查询-
mysql> select *from DemoTable where SubjectCode regexp '[^a-zA-Z0-9\&]';
这将产生以下输出-
+-------------+ | SubjectCode | +-------------+ | Java899@22 | | C# | | ~Python232 | | MongoDB% | +-------------+ 4 rows in set (0.00 sec)