I'm currently working on a project that requires I write my own constraints for my database (to show I know how they work). I'm attempting to test them in MySQL Workbench however the programs settings ...
I know for each foreign key we should make an index on its column, But it is not necessary when that column in first part of PRIMARY index. MySQL accepts this query: CREATE TABLE IF NOT EXISTS ...
I've found on the web that: You will get this message if you're trying to add a constraint with a name that's already used somewhere else and If the table you're trying to create includes a ...