Not null. • By default, a column can hold NULL values. The NOT NULL constraint enforces a column to NOT accept NULL values. • The NOT NULL constraint enforces a field to always contain a value. This means that you cannot insert a new record, or update a record without adding a value to this field. . . . #uploadkompakan #ukhighK_jkt @uploadkompakan @kenobispace #coworkingspace #coworking #coworkinglife #art #iphotography #gadgetgrapher #sql #programmingisfun







