“PENTINGNYA MENGGUNAKAN CHECK CONSTRAINTS DALAM DESAIN DATABASE SISTEM PENDUKUNG KEPUTUSAN”. Journal of Information System Management (JOISM) 2, no. 2 (January 26, 2021): 8–11. Accessed January 21, 2026. https://devjurnal.amikom.ac.id/index.php/joism/article/view/373.