Vanilla MySQL doesn't support any sort of referential integrity. You can use "InnoDB" tables (here) that add that functionality. If you're in a shared hosting ...

I am working on a DB project for school and am almost ready to create my tables. I am unsure as to when I turn on referential integrity. Do I create the tables, do my initial data import, and then ...

There are two categories of integrity constraints: General constraints, which allow you to restrict the data values that are accepted for the variables in a single data file, such as requiring that ...