Commutative operations - PowerPoint PPT Presentation

CS 255: Database System Principles slides: From Parse Trees to Logical Query Plans

CS 255: Database System Principles slides: From Parse Trees to Logical Query Plans. By:- Arunesh Joshi Id:-006538558. Agenda. Conversion to Relational Algebra. Removing Sub queries From Conditions. Improving the Logical Query Plan. Grouping Associative/Commutative Operators. . Parsing.

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Doubling and Halving

Doubling and Halving. Double 4 is 8 and half of 18 is 9 so 8 x 9 = 72. Trebling and Thirding. Problem: If I planted 4 rows of strawberry plants and put 18 plants in each row how many plants would I have altogether?. Triple 4 is 12 and a third of 18 is 6 so 12 x 6 = 72.

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421 views • 10 slides

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