'Sort based' diaporamas de présentation

Nested-Loop joins

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Query Processing

Query Processing. Two-Pass Algorithms. Source: our textbook. Nested-Loop Joins. Another helpful primitive. Main idea to join relations R and S : for each tuple s in S do for each tuple r in R do if r and s match then ouput the join of r and s How to optimize this?.

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Query Execution 15.5 Two-pass Algorithms based on Hashing

Query Execution 15.5 Two-pass Algorithms based on Hashing. By Swathi Vegesna. At a glimpse. Introduction Partitioning Relations by Hashing Algorithm for Duplicate Elimination Grouping and Aggregation Union, Intersection, and Difference Hash-Join Algorithm Sort based Vs Hash based

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Query Processing

Query Processing. (Two-Pass Algorithms). Priyadarshini.S 006493851 Cs 257_117_ch 15_15.5. Two-Pass Algorithms Using Hashing. General idea: Hash the tuples using an appropriate hash key

175 views • 11 slides