Command to drop all columns in a database that have prefix test_ to run

Question

How I can run a command in phpMyAdmin which will drop all columns in a database that have the prefix test_.

Answer 1

I would like to explain or simplify this answer for those like me who were having trouble with this.

I was having trouble dropping a column with the name 'seq' in all tables in my database 'demo'.

You can create a selection with the commands formatted for each table using something like this:

Select concat('alter table ', table_name, ' drop column ', 'seq;')
from (select table_name
from INFORMATION_SCHEMA.tables
where table_name = table_name and
table_schema = 'demo') as t

This creates the alter table command for each table in the 'demo' database.

You have to select the result, copy it, and paste it back into the query editor.

It's a two step process, but if you have to do this several times, save the commands in a text file to run again later.