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Index varies greatly based - PowerPoint PPT Presentation

Indexing

Indexing. February 28 th , 2003 Lecture 20. Review. What is index? Compare with primary key Why do we need index? Alternative for data entry k* in index? Data record with key value k < k , rid of data record with search key value k >

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File Organizations and Indices

File Organizations and Indices. Unordered (Heap) Files. Simplest file structure: contains records in no particular order; default in many systems. As file grows and shrinks, disk pages are allocated and de-allocated. To support record-level operations, we must:

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Index varies greatly based - PowerPoint PPT Presentation

Indexing

File Organizations and Indices