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All versions of PostgreSQL. Add an additional version-specific tag like [postgresql-13] if that context is relevant.

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Left join multiple tables for millions of rows on multiple columns

I am using PostgreSQL via pgadmin3 on Ubuntu 16.04 with 7.7GiB Memory and 4x.3GHz processor. My only aim with this database is to merge multiple datasets (tables) and extract the final table. …
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