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Common Table Expressions (CTEs)

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May 11, 2024 2 minute read
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Common Table Expressions (CTEs) are a versatile feature of SQL that extend the capabilities of the language by allowing users to define temporary tables that can be referenced in subsequent queries. Also known as subqueries or derived tables in other database contexts, CTEs enable the creation of complex and modular queries that can be easier to understand and maintain than traditional subqueries.

Benefits of Using CTEs

Using CTEs offers several key benefits:

Path to Common Table Expressions (CTEs)

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We've curated three courses to help you on your path to Common Table Expressions (CTEs). Use these to develop your skills, build background knowledge, and put what you learn to practice.
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Reading list

We've selected seven books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Common Table Expressions (CTEs).
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Mastering PostgreSQL 12
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Describes various aspects of PostgreSQL, including CTEs. The book great resource for PostgreSQL users of all levels of experience.
Mastering PostgreSQL 12
Paperback
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Mastering PostgreSQL 12
Kindle Edition
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SQL Server Query Performance Tuning
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The book describes in great depth and with a lot of examples how to use CTEs, both recursive and non-recursive, to solve real-world use cases.
SQL Server Query Performance Tuning
Paperback
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SQL Server Query Performance Tuning
Kindle Edition
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Beginning MySQL
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This short book describes Common Table Expressions (CTEs) in PostgreSQL. It provides a brief overview of CTEs, how they are used in PostgreSQL, how they work internally and how to leverage PostgreSQL specific features such as WITH RECURSIVE.
Beginning MySQL
Paperback
$$
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SQL Cookbook
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This concise book provides many real-world example SQL solutions, including some using CTEs.
SQL Cookbook: Query Solutions and Techniques for...
Paperback
$$
SQL Cookbook: Query Solutions and Techniques for...
Kindle Edition
$$
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IBM Optim Performance Manager for DB2 for Linux,...
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Contains a chapter about CTEs and although its main focus is on DB2, it also provides a good overview of CTEs in general.
IBM Optim Performance Manager for DB2 for Linux,...
Paperback
$$$
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SQL Performance Explained
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Is not specifically about CTEs, but it does provide information about how to write efficient SQL queries, including tips on how to use CTEs efficiently.
SQL Performance Explained Everything Developers...
Paperback
$$
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SQL Tuning
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Is not specifically about CTEs, but it does provide information about how to optimize SQL queries, including tips on how to use CTEs effectively.
SQL Tuning: Generating Optimal Execution Plans
Paperback
$$
SQL Tuning: Generating Optimal Execution Plans
Kindle Edition
$$
Related topics
SQL
Hierarchical Data
Big Data
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