On a recent project, I needed to populate a newly created column added to an existing database table with over 10 rows of record with a custom values and I’m going to show us how I did it.
Take for example, a database table that previously consisted of three columns and an additional handler_structure column was added to it via the SQL below.
ALTER TABLE table_name ADD `handler_structure` LONGTEXT NOT NULL AFTER `structure`
Notice the handler_structure columns for all row records are empty.
To add a custom value say He is God, the SQL code below will do the trick.
UPDATE table_name SET handler_structure='He is God' WHERE id > 0;
The SQL above add the text or string He is God to every row with id greater than 0 thus, all the rows are affected.
La Fin!