Advantages
Since a single entry in the grid file contains pointers to all records indexed by the specified keys:
- No special computations are required
- Only the right records are retrieved
- Can also be used for single search key queries
- Easy to extend to queries on n search keys
- Significant improvement in processing time for multiple-key queries
- Has a two-disk-access upper bound for accessing data.
Read more about this topic: Grid File
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