Conditional SQLite check constraint?

How about:

CHECK (status = "Current" or (status = "Complete" and enddate is not null))

sql sqlite constraints

CREATE TABLE test (  id       integer PRIMARY KEY,  status   text NOT NULL CHECK (status IN ('Current', 'Complete')),  enddate  date NOT NULL);

This will work in SQLite, with the CHECK constraint written inline. I changed double quotes to apostrophes so it can be used in PHP.

sql sqlite constraints

There's nothing stopping you from having multiple CHECK constraints on a single table. IMO the simplest and most easily expandable solution:

CHECK (status IN ("Current", "Complete"))CHECK (status <> "Complete" OR enddate IS NOT NULL)

This uses the fact that if A then B is logically equivalent to either not A or B.

CodeHunter