This is personal study note Copyright and original reference: https://www.youtube.com/watch?v=SBjoVsujVuA&list=PLVsNizTWUw7HhYtI-4GGmlJ5yxNdwNI_X&index=2 ================================================================================ Database - The thing where "large quantity of data collection" is systemically composed DBMS: Database Management System, Software like MySQL ================================================================================