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

You can use it.

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