Question

I have many MySQL databases that have same tables with the same structure. I am looking for simple way how can I alter table structure in all of the databases at once ( in one query or using one tool).

Answer 1

you can see this solution like of alter many tables in the post :

select concat( 'alter table ', a.table_name, ' add index `fields` (`field`);' )
from information_schema.tables a 
where a.table_name like 'table_prefix_%';