{"product_id":"sql-and-relational-theory-2nd-edition","title":"SQL and Relational Theory, 2nd Edition","description":"\u003cp\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eSQL is full of difficulties and traps for the unwary. You can avoid them if you understand relational theory, but only if you know how to put the theory into practice. In this insightful book, author C.J. Date explains relational theory in depth, and demonstrates through numerous examples and exercises how you can apply it directly to your use of SQL.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"color: rgb(8, 113, 135); font-family: Verdana; font-size: 11px; line-height: 15px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eThis second edition includes new material on recursive queries, “missing information” without nulls, new update operators, and topics such as aggregate operators, grouping and ungrouping, and view updating. If you have a modest-to-advanced background in SQL, you’ll learn how to deal with a host of common SQL dilemmas.\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eWhy is proper column naming so important?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eNulls in your database are causing you to get wrong answers. Why? What can you do about it?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eIs it possible to write an SQL query to find employees who have never been in the same department for more than six months at a time?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eSQL supports “quantified comparisons,” but they’re better avoided. Why? How do you avoid them?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eConstraints are crucially important, but most SQL products don’t support them properly. What can you do to resolve this situation?\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan style=\"color: rgb(12, 12, 12);\"\u003eDatabase theory and practice have evolved since the relational model was developed more than 40 years ago. \u003cstrong\u003eSQL and Relational Theory\u003c\/strong\u003e draws on decades of research to present the most up-to-date treatment of SQL available.\u003c\/span\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Shroff\/O'Reilly","offers":[{"title":"Default Title","offer_id":50505638215750,"sku":"9789350236086","price":675.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/2797\/1142\/files\/9789350236086.jpg?v=1790312767","url":"https:\/\/cb-india.com\/products\/sql-and-relational-theory-2nd-edition","provider":"Computer Bookshop (India) Pvt Ltd","version":"1.0","type":"link"}