Sometimes we need to add ulterior constraints to the table we define. The ALTER TABLE statement enables us to do this. There are several types of constraints we can add. If we want to ensure that all ...

In this exercise, you'll rename these columns to id using the RENAME COLUMN command and then specify primary key constraints for them. This is as straightforward as adding unique constraints (see the ...

Learn how to find, modify, drop, and avoid index or constraint dependencies or changes in SQL, using system views, SQL statements, and best practices.