Indexing: File Organization & Techniques

This lecture covers file organization, indexing, and metadata in databases. It explains the concepts of heap and sorted files, different types of indexing like primary, clustering, and secondary key. The instructor discusses index classification, clustered vs. unclustered indexes, and dense vs. sparse indexes. Various indexing techniques such as hash vs. tree are explored, along with the importance of choosing the right search key. Examples of simple indexes on GPA and data entry representations are provided, highlighting the tradeoffs between different index structures.