TSQL Execution Plan Operator - Hash Match Join
Channel: ByteScout
Date: 2021-03-24

A Hash match join is generally used when your input tables have a good amount of rows and no proper indexes exist on them. So basically a hash join builds a hash table by computing a hash value for each row from its build input. 
The general form of hash join is the in-memory hash join, in which the entire outer build table is scanned and computed the hash key for each row, and then a hash table is a built-in memory. In this video, we'll be going to learn about how this hash join operator works.
 
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