I have a column value stored in the database as:
a:2:{i:0;s:2:\"US\";i:1;s:2:\"19\";}
I want to unserialize it during the mysql
As mentioned by kchteam, MySQLToolBox library comes handy for this purpose using a custom defined MySQL function getPhpSerializedArrayValueByKey available here https://github.com/KredytyChwilowki/MySQLToolBox/blob/master/getPhpSerializedArrayValueByKey.sql.
After adding this function, you can retrieve any value in the serialized array by using the following syntax,
SELECT getPhpSerializedArrayValueByKey(column_name, 'array_key') AS deseializedArrayValue FROM table_name
The given array can be unserialized like,
SELECT getPhpSerializedArrayValueByKey('a:2:{i:0;s:2:"US";i:1;s:2:"19";}
', 'key_to_retrieve') AS key_to_retrieve