新機能はApp optimized for fast performancesnew images added and well explained new chapters added.NEW CHAPTERS:Database vs Data Warehouse: Key DifferencesWhat is Data Lake & It's ArchitectureETL vs ELT: Must Know DifferencesWhat is Data Modelling? Conceptual, Logical, & Physical Data Models What is OLAP (Online Analytical Processing): Cube, Operations & TypesMOLAP (Multidimensional Online Analytical Processing)OLTP vs OLAP: What's the Difference? and many More