'Split image bucket' diaporamas de présentation

Hash-Based Indexes

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CS 405G: Introduction to Database Systems

CS 405G: Introduction to Database Systems. 23 Hashing Chen Qian University of Kentucky. B+-tree Organization. Internal node. Leaf node. Review. B + -tree Insert Find correct leaf L. Put data entry onto L . If L has enough space, done !

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Hash-Based Indexes

Hash-Based Indexes. Chapter 11. Introduction. Hash-based indexes are best for equality selections . Cannot support range searches. A good hash function is: Random Uniform Static and dynamic hashing techniques exist; trade-offs similar to ISAM vs. B+ trees. Static Hashing.

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Hash-Based Indexes

Hash-Based Indexes. Comments. Comments on the exam? $1 for anyone who solved the puzzle. Rope Puzzle?. Who checked out Bill Gates speech?. Introduction. As for any index, 3 alternatives for data entries k* : Data record with key value k

216 views • 21 slides

Hash-Based Indexes

Hash-Based Indexes. Chapter 11. Introduction. As for any index, 3 alternatives for data entries k* : Data record with key value k < k , rid of data record with search key value k > < k , list of rids of data records with search key k > Choice orthogonal to the indexing technique

289 views • 19 slides

Hash-Based Indexes

Hash-Based Indexes. Chapter 11. Introduction. As for any index, 3 alternatives for data entries k* : Data record with key value k < k , rid of data record with search key value k > < k , list of rids of data records with search key k > Choice orthogonal to the indexing technique

262 views • 19 slides

Hash-Based Indexes

Hash-Based Indexes. Chapter 11. Introduction. As for any index, 3 alternatives for data entries k* : Data record with key value k < k , rid of data record with search key value k > < k , list of rids of data records with search key k > Choice orthogonal to the indexing technique

199 views • 19 slides