A Guide to SQL (8th Edition) - download pdf or read online

By Philip J. Pratt, Mary Z. Last

ISBN-10: 0324597681

ISBN-13: 9780324597684

A consultant TO SQL, 8E, is still the basic SQL reference. It builds at the good fortune of prior versions via providing easy SQL instructions within the context of a working case during which a enterprise makes use of SQL to regulate orders, components, consumers, and revenues reps. The publication covers the basics of SQL programming utilizing trouble-free guide and huge hands-on workouts. carrying on with with its specialize in studying the fundamentals whatever the database setting selected, this version positive factors examples from the newest databases: Oracle 11g, entry 2007, and MySQL. The 8th version expands at the use of working case stories through including a 3rd working case to the large hands-on pedagogy on the finish of each bankruptcy.

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Extra info for A Guide to SQL (8th Edition)

Example text

Know the unique values for other attributes? For example, when you have the three attributes REP_NUM, LAST_NAME, and FIRST_NAME and you know a unique value for REP_NUM, do you also know a unique value for LAST_NAME and FIRST_NAME? If so, then LAST_NAME and FIRST_NAME are functionally dependent on REP_NUM (REP_NUM LAST_NAME, FIRST_NAME). Use the functional dependencies to identify the tables by placing each attribute with the attribute or minimum combination of attributes on which it is functionally dependent.

This is represented as: REP_NUM LAST_NAME Q&A Question: In the CUSTOMER table, is CUSTOMER_NAME functionally dependent on REP_NUM? Answer: No. Given the REP_NUM 20, for example, you would not be able to find a single customer name, because 20 appears on more than one row in the table. Q&A Question: In the ORDER_LINE table, is NUM_ORDERED functionally dependent on ORDER_NUM? Answer: No. An ORDER_NUM might be associated with several items in an order, so having just an ORDER_NUM does not provide enough information.

Calculate the average price for books that have the type ART. 12. For each book published by Penguin USA, list the book code and title. 13. List the book code, book title, and units on hand for each book in branch number 3. 21 Alexamara Marina Group Answer each of the following questions using the Alexamara Marina Group data shown in Figures 1-8 through 1-12. No computer work is required. 1. List the owner number, last name, and first name of every boat owner. 2. List the last name and first name of every owner located in Bowton.

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A Guide to SQL (8th Edition) by Philip J. Pratt, Mary Z. Last


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