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3 posts tagged with "SQL"

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· 10 min read
James Moore

A Common Table Expression (CTE) in SQL is a named temporary result set, derived from a SELECT statement, that can be used within another SELECT, INSERT, UPDATE, or DELETE statement. It is defined using the WITH clause followed by a SELECT statement and a name for the CTE, and can be referred to by name in the main query. CTEs are useful for breaking down complex queries into simpler, more readable parts, and can also improve query performance by reducing the need to repeat subqueries.

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· 9 min read
James Moore

SQL window functions allow you to perform calculations on a set of rows that are related to the current row, without the need for self-joins or subqueries. They are used to perform a calculation across a set of table rows that are somehow related to the current row, in a way similar to aggregate functions.

Want to learn more? Check out this video