distinct-on – CodeRavo

Understanding SQL Aggregation: Selecting Maximum Values and Handling Non-Aggregated Columns

Introduction In relational databases, aggregating data is a common task used to summarize information. One of … Understanding SQL Aggregation: Selecting Maximum Values and Handling Non-Aggregated ColumnsRead more

distinct-on, group-by-clause, join(), max-function, sql-aggregation, subquery, window-functions

Selecting Unique Rows with PostgreSQL's DISTINCT ON for Grouped Data

Introduction When working with SQL databases, particularly in applications that involve complex data aggregations or reporting, … Selecting Unique Rows with PostgreSQL's DISTINCT ON for Grouped DataRead more

distinct-on, group by, indexing, nulls-last, order-by, performance optimization, PostgreSQL, select, SQL