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MySQL query to retrieve only the column values with special characters?
For this, use REGEXP. Let us first create a table −
mysql> create table DemoTable(SubjectCode varchar(100)); Query OK, 0 rows affected (0.89 sec)
Insert some records in the table using insert command. The records consists of text, numbers and special characters −
mysql> insert into DemoTable values('Java899@22');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('C#');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable values('~Python232');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('MongoDB%');
Query OK, 1 row affected (0.21 sec)
mysql> insert into DemoTable values('C123456');
Query OK, 1 row affected (0.37 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-------------+ | SubjectCode | +-------------+ | Java899@22 | | C# | | ~Python232 | | MongoDB% | | C123456 | +-------------+ 5 rows in set (0.00 sec)
Following is the query to get all the values with special characters −
mysql> select *from DemoTable where SubjectCode regexp '[^a-zA-Z0-9\&]';
This will produce the following output −
+-------------+ | SubjectCode | +-------------+ | Java899@22 | | C# | | ~Python232 | | MongoDB% | +-------------+ 4 rows in set (0.00 sec)
Updated on: 22-Aug-2019
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