Query to find foreign keys

Question

I have a database where I need to drop some foreign keys, but I don\'t know beforehand whether the foreign keys still exist.

I\'ve found some stored procedures (http

Answer 1

You need to connect to the Information scheme and you can find all the information about the primary key and foreign keys in this table

 select
        concat(table_name, '.', column_name) as 'foreign key',  
        concat(referenced_table_name, '.', referenced_column_name) as 'references'
    from
        information_schema.key_column_usage
    where
        referenced_table_name is not null;

HELP: see this link list-foreign-keys-in-mysql