Querying multiple tables - PowerPoint PPT Presentation

A Guide to SQL, Eighth Edition

A Guide to SQL, Eighth Edition. Chapter Five Multiple-Table Queries. Objectives. Use joins to retrieve data from more than one table Use the IN and EXISTS operators to query multiple tables Use a subquery with a subquery Use an alias. Objectives (continued). Join a table to itself

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SQL - III

SQL - III. Reading: C&amp;B, Chap 5. In this lecture you will learn. the concept of joining tables why joins are central to relational database systems how to specify joins in SQL the different ways of joining tables using table aliases &amp; full column names in queries.

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