勃斯丶李 ~~~的博客Here I want to create 2 CHECK constraint before the record insert to the database.ALTER TABLE SubjectEnrollmentADD CONSTRAINT register CHECK (register <= classSize AND register >=0),ADD CONSTRAI...
weixin_39862669的博客In MySQLWorkbench's EER diagram, there is a checkbox to make each column in a table unique, not null, primary key etc.However, I would like to have a UNIQUE constraint on multiple columns. Is it poss...