Web Reference: #12 - Join Algorithms: Hash, Sort-Merge, Nested Loop Joins (CMU Intro to Database Systems) Explore the fundamental join algorithms used in database systems, including hash joins, sort-merge joins, and nested loop joins, in this comprehensive lecture from Carnegie Mellon University's Intro to Database Systems course. Mar 8, 2026 · Sort-merge join is attractive when sorting is already useful elsewhere. Hash join is the default workhorse for large equi-joins, especially when ordering is unnecessary.
YouTube Excerpt: Annotated Video: http://cmudb.io/15721-s16-lect12 Slides PDF: http://15721.courses.cs.cmu.edu/spring2016/slides/
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