Optimized case of semi-connection and anti-connection

Let's first understand some concepts: Semi-join: Two tables are associated, returning only matched data and only one table. Semi-join generally refers to the occurrence of IN and EXISTS in sub-queries. Anti-join: A connection between two tables that returns only the data of the main table and only the data that is not associa ...

Added by roneill on Sun, 12 May 2019 12:38:52 +0300