PostgreSQL – COALESCE

Date: 2023-10-20

PostgreSQL's COALESCE function efficiently handles NULL values in SQL queries. It takes a list of arguments and returns the first non-NULL value. This is useful for replacing NULLs with meaningful alternatives, improving query readability and data reliability. The function is demonstrated with a practical example using an employees table, replacing NULL salaries with 0. COALESCE enhances database operations by providing consistent and robust results.

Read more: https://examples.javacodegeeks.com/postgresql-coalesce/