Disjoing and overlapping constraints in MySQL

[YourSurrogateGod]

Does any one know of a tutorial/example where I can find something on how to make disjoing and overlapping constraints in MySQL specifically. The reason why I ask is because I would like to make a table where there is one update and information in another table is updated as well (based on a primary key that's in both tables.) Any thoughts?

[YourSurrogateGod]

One other question. Is there a maximum number of tables (for MySQL) that can be created in a table?

Thanks in advance :wave: .

[edit]

Never mind, I solved the problem for this one.