https://duckdb.org/docs/current/sql/query_syntax/groupby
GROUP BY Clause – DuckDB
The GROUP BY clause specifies which grouping columns should be used to perform any aggregations in the SELECT clause. If the GROUP BY clause is specified, the...
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https://neon.com/postgresql/tutorial/group-by
PostgreSQL GROUP BY Clause
In this tutorial, you will learn how to use PostgreSQL GROUP BY clause to divide rows into groups.
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