SQL Queries for mere mortals. John L. Viescas, Michael J. Hernandez

The book is great for learning SQL queries.
The authors considered topics such as:

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• Types of databases
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• Relational model
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• Database structure and design
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• SQL SQL history and first query creation
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• Sets and operations on them
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• INNER JOIN
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• Associations
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• Modification of the dataset

Advantages:

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• Each topic is considered in detail
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• Graphical representation of information
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• Examples and tasks