How to add a column and make it a foreign key in single MySQL statement?

Question

In mysql, can I add a column and foreign key in the same statement? And what is the proper syntax for adding the fk?

Here is my SQL:

ALTER TABLE dat         


        

Answer 1

This can be simplified a bit. You just need to add the "ADD" keyword before "FOREIGN KEY". Adding example below.

ALTER TABLE database.table
ADD COLUMN columnname INT DEFAULT(1),
ADD FOREIGN KEY (fk_name) REFERENCES reftable(refcolumn) ON DELETE CASCADE;