Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

Welcome to this hands-on lab on Working with Multiple Tables in SQL! This repository contains a step-by-step guide on how to write SQL queries that access multiple tables, compose queries using ...

When you execute a query using the LEFT JOIN syntax, SQL does two things: It returns all of the records from both tables that contain matching values, as defined by the ON clause.

If tables selected for joining have a relation defined between them, Query and Reporting joins them automatically; see Joining Tables Automatically for more information.

SQL views make accessing multiple data types and storing complex queries easier whereas materialized views can help you improve efficiency and boost performance.

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