SQL: Performance comparison for exclusion (Join vs Not in)

Question

I am curious on the most efficient way to query exclusion on sql. E.g. There are 2 tables (tableA and tableB) which can be joined on 1 column (col1). I want to display the d

Answer 1

Depends on the RDBMS. For Microsoft SQL Server NOT EXISTS is preferred to the OUTER JOIN as it can use the more efficient Anti-Semi join.

For Oracle Minus is apparently preferred to NOT EXISTS (where suitable)

You would need to look at the execution plans and decide.