23502 — Not Null Violation

이 에러의 원인

The query does not provide a value for a NOT NULL column with no DEFAULT defined.

수정 방법

Provide a value for the column. Add a DEFAULT value to the column definition. Ensure required fields are always populated.

-- not_null_violation
INSERT INTO users (email) VALUES (NULL);
-- Fix: provide required value
INSERT INTO users (email) VALUES ('user@example.com');