When is a CROSS JOIN the correct choice?

Problem Statement

Explanation

A cross join returns every combination of rows from both inputs. It is useful for generating grids or filling a date series crossed with categories. Use with care. Without a subsequent filter, the row count is rows(A) × rows(B), which can explode quickly.

Code Solution

SolutionRead Only

SELECT p.product_id, d.dt
FROM products p
CROSS JOIN dates d;

Practice Sets

This question appears in the following practice sets:

CTEs, Subqueries & Advanced Joins

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When is a CROSS JOIN the correct choice?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

When is a CROSS JOIN the correct choice?

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