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MySQL search if more than one string contains special characters?\\n
To search if strings contain special characters, you can use REGEXP. Following is the syntax −
select * from yourTableName where yourColumnName REGEXP '[^a-zA-Z0-9]';
Let us first create a table −
mysql> create table specialCharactersDemo -> ( -> StudentId varchar(100) -> ); Query OK, 0 rows affected (0.58 sec)
Insert records in the table using insert command. Following is the query −
mysql> insert into specialCharactersDemo values('STU_1234');
Query OK, 1 row affected (0.15 sec)
mysql> insert into specialCharactersDemo values('STU567');
Query OK, 1 row affected (0.14 sec)
mysql> insert into specialCharactersDemo values('STU#1234');
Query OK, 1 row affected (0.13 sec)
mysql> insert into specialCharactersDemo values('STU897$');
Query OK, 1 row affected (0.18 sec)
mysql> insert into specialCharactersDemo values('STU999');
Query OK, 1 row affected (0.43 sec)
mysql> insert into specialCharactersDemo values('STU1010');
Query OK, 1 row affected (0.14 sec
Following is the query to display all records from the table using select statement −
mysql> select *from specialCharactersDemo;
This will produce the following output −
+-----------+ | StudentId | +-----------+ | STU_1234 | | STU567 | | STU#1234 | | STU897$ | | STU999 | | STU1010 | +-----------+ 6 rows in set (0.00 sec)
Here is the query to search if a string contains special characters −
mysql> select *from specialCharactersDemo -> where StudentId REGEXP '[^a-zA-Z0-9]';
This will produce the following output −
+-----------+ | StudentId | +-----------+ | STU_1234 | | STU#1234 | | STU897$ | +-----------+ 3 rows in set (0.02 sec)
You can use another syntax for the above result. Following is the query −
mysql> select *from specialCharactersDemo -> where StudentId REGEXP'[^[:alnum:]]';
This will produce the following output −
+-----------+ | StudentId | +-----------+ | STU_1234 | | STU#1234 | | STU897$ | +-----------+ 3 rows in set (0.05 sec)
Updated on: 2019-07-30T22:30:25+05:30
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