A Logical Database is a hierarchical structure of tables. Use the GET statement to process Logical Databases.
- LDB consists of logically related tables grouped together and used for reading and processing data.
- Advantages = 1. No need of programming for retrieval , meaning for data selection.
- 2. Easy to use standard user interface, have check completeness of user input.
Disadvantages = 1. Fast in case of lesser no. of tables But if the table is in the lowest level of hierarchy, all upper level tables should be read so performance is slower.