What does a FULL OUTER JOIN return?

Problem Statement

Explanation

FULL OUTER JOIN returns the union of matches and non-matches from both sides, padding missing columns with NULLs. It is useful for reconciliation and diff-like reports where you must see orphans from both directions.

Code Solution

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SELECT a.id, b.id
FROM A a
FULL OUTER JOIN B b ON b.id = a.id;

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What does a FULL OUTER JOIN return?

Problem Statement

Explanation

Code Solution

Practice Sets

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What does a FULL OUTER JOIN return?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime