检查字符串是否在MySQL中包含数字?
要检查字符串是否包含数字,可以使用regexp,即正则表达式。语法如下-
SELECT *FROM yourTableName where yourColumnName REGEXP ‘[0-9]’;
为了理解上述语法,让我们创建一个表。创建表的查询如下-
mysql> create table StringContainsNumber-> (
-> Id int not null auto_increment,
-> Words text,
-> primary key(Id)
-> );
使用insert命令在表中插入一些记录。查询如下-
mysql> insert into StringContainsNumber(Words) values('He12345llo');mysql> insert into StringContainsNumber(Words) values('MySQL is not a programming
4language');
mysql> insert into StringContainsNumber(Words) values('Java is an object oriented');
mysql> insert into StringContainsNumber(Words) values('Java does not support 456 multiple
inheritance');
mysql> insert into StringContainsNumber(Words) values('MySQL is a RDBMS 456');
使用select语句显示表中的所有记录。查询如下-
mysql> select *from StringContainsNumber;
以下是输出。
+----+------------------------------------------------+| Id | Words |
+----+------------------------------------------------+
| 1 | He12345llo |
| 2 | MySQL is not a programming 4language |
| 3 | Java is an object oriented |
| 4 | Java does not support 456 multiple inheritance |
| 5 | MySQL is a RDBMS 456 |
+----+------------------------------------------------+
5 rows in set (0.00 sec)
这是使用REGEXP查找具有数字的字符串的查询-
mysql> select *from StringContainsNumber where Words regexp '[0-9]';
以下是输出-
+----+------------------------------------------------+| Id | Words |
+----+------------------------------------------------+
| 1 | He12345llo |
| 2 | MySQL is not a programming 4language |
| 4 | Java does not support 456 multiple inheritance |
| 5 | MySQL is a RDBMS 456 |
+----+------------------------------------------------+
4 rows in set (0.11 sec)
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