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How can we fetch a MySQL SET column as a list of integer offset?
We can fetch the MySQL SET column values as a list of integer offset with the help of the MAKE_SET() function. To make it understand, we are creating a table named ‘set_testing’ as follows −
mysql> Create table set_testing( id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT, table SET('ABC','ABD','GHF') NOT NULL);
Query OK, 0 rows affected (0.08 sec)
mysql> Insert into set_testing (table) values('1');
Query OK, 1 row affected (0.06 sec)
mysql> Insert into set_testing (table) values('2');
Query OK, 1 row affected (0.06 sec)
mysql> Insert into set_testing (table) values('3');
Query OK, 1 row affected (0.02 sec)
mysql> Insert into set_testing (table) values('4');
Query OK, 1 row affected (0.02 sec)
mysql> Select * from set_testing;
+----+---------+
| id | table |
+----+---------+
| 1 | ABC |
| 2 | ABD |
| 3 | ABC,ABD |
| 4 | GHF |
+----+---------+
4 rows in set (0.00 sec)Now, the following query will fetch the MySQL SET column as a list of integer offset −
mysql> Select MAKE_SET(types+0,'1','2','3') as output from doctypes1; +--------+ | output | +--------+ | 1 | | 2 | | 1,2 | | 3 | +--------+ 4 rows in set (0.00 sec)
Updated on: 22-Jun-2020
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