'Grouping attributes' diaporamas de présentation

Query Execution

Query Execution. Since our SQL queries are very high level the query processor does a lot of processing to supply all the details. An SQL query is translated internally into a relational algebra expression.

384 views • 38 slides

Efficient Incremental Maintenance of Data Cubes

Efficient Incremental Maintenance of Data Cubes. 2006. 9. 15. Ki Yong Lee Software Laboratories Samsung Electronics Co., Ltd. Myoung Ho Kim Division of Computer Science Korea Advanced Institute of Science and Technology. Outline. Introduction Related work

453 views • 33 slides

More SQL*

Extended Relational Algebra Outerjoins, Grouping/Aggregation Insert/Delete/Update. More SQL*. * Adapted from slides give by H. Molina at Stanford. The Extended Algebra. Arithmetic in projections and selections ? = eliminate duplicates from bags. ? = sort tuples.

336 views • 25 slides

Relational Operations on Bags Extended Operators of Relational Algebra

262 views • 25 slides

Spring 2011 Instructor: Hassan Khosravi

368 views • 23 slides