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Connolly TM, Beg CE. Database Systems: A Practical Approach to Design, Implementation, and Management. Sixth edition. Pearson; 2015. https://ebookcentral.proquest.com/lib/uea/detail.action?docID=5136720
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Lans RF van der. Introduction to SQL: Mastering the Relational Database Language. 4th ed. Addison-Wesley; 2006. https://www.oreilly.com/library/view/introduction-to-sql/0321305965/?ar