Traditional database indexes have a tree structure on disk (called a B-tree) that has a key value, which allows the database engine to quickly retrieve the row needed using a key.

Database administrators will notice potentially significant query execution gains with PostgreSQL 17. The gains will be noticeable for queries that use the ‘IN’ clause with a B-tree index ...

An index with clustered primary keys should be present in dimension tables… Natural business keys can be indexed in dimension tables. There is also the possibility of creating a single-index index on ...

The bigger your spreadsheet, the more you need INDEX and MATCH functions, which you can combine with SUM, AVERAGE, and MAX to refine your searches.