Remove specific word in a comma separated string with MySQL

Let us first create a table −

mysql> create table DemoTable836(FirstName SET('John','Chris','Adam'));
Query OK, 0 rows affected (0.60 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable836 values('John,Chris');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable836 values('John,Chris,Adam');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable836 values('Chris,Adam');
Query OK, 1 row affected (0.25 sec)
mysql> insert into DemoTable836 values('John,Adam');
Query OK, 1 row affected (0.37 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable836;

This will produce the following output −

+-----------------+
| FirstName       |
+-----------------+
| John,Chris      |
| John,Chris,Adam |
| Chris,Adam      |
| John,Adam       |
+-----------------+
4 rows in set (0.00 sec)

Following is the query to remove a specific word in a comma-separated string −

mysql> update DemoTable836 set FirstName = FirstName &~ (1 << FIND_IN_SET('Chris', FirstName) - 1);
Query OK, 3 rows affected (0.21 sec)
Rows matched: 4 Changed: 3 Warnings: 0

Let us check the table records once again −

mysql> select *from DemoTable836;

This will produce the following output −

+-----------+
| FirstName |
+-----------+
| John      |
| John,Adam |
| Adam      |
| John,Adam |
+-----------+
4 rows in set (0.00 sec)