Haki Benita • 8/12/2019

How to Get the First or Last Value in a Group Using Group By in SQL

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This article explains how to solve a common SQL reporting problem: extracting the first or last value within a grouped result set. Using a concrete example of a user account event table with deposits, withdrawals, and credit settings, it demonstrates techniques in PostgreSQL (and references Oracle) to aggregate balances and find the latest credit value, focusing on window functions like LAST_VALUE and FIRST_VALUE.

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#sql #postgresql #Group By
How to Get the First or Last Value in a Group Using Group By in SQL

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