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How can we fetch a MySQL SET column as a list of integer offset?
<p style="">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 −</p><pre class="prettyprint notranslate">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)</pre><p style="">Now, the following query will fetch the MySQL SET column as a list of integer offset −</p><pre class="prettyprint notranslate">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)</pre>
Updated on 22-Jun-2020 06:25:01
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