By Philip J. Pratt, Mary Z. Last
A consultant TO SQL, 8E, is still the basic SQL reference. It builds at the luck of past variations by means of proposing easy SQL instructions within the context of a operating case during which a company makes use of SQL to control orders, elements, buyers, and revenues reps. The ebook covers the basics of SQL programming utilizing trouble-free guideline and large hands-on workouts. carrying on with with its specialize in studying the fundamentals whatever the database setting selected, this version beneficial properties examples from the newest databases: Oracle 11g, entry 2007, and MySQL. The 8th version expands at the use of operating case reports by means of including a 3rd working case to the huge hands-on pedagogy on the finish of each bankruptcy.
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Extra info for A Guide to SQL (8th Edition)
Jove Publications published The Edge, When Rabbit Howls, and Slay Ride. To find the books published by Jove Publications, find its code (JP) in the PUBLISHER table. Next, find all records in the BOOK table for which the publisher code is JP. The table named WROTE, as shown in Figure 1-7, relates books to the authors who wrote them. The SEQUENCE column indicates the order in which the authors of a particular book are listed on the cover. The table named INVENTORY in the same figure is used to indicate the number of copies of a particular book that are currently on hand at a particular branch of Henry Books.
Ask yourself the following question: if you know a unique value for an attribute, do you also 5. 6. 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.
MARINA MARINA_NUM NAME ADDRESS 1 Alexamara East 108 2nd Ave. Brinman FL 32273 2 Alexamara Central 283 Branston W. Brinman FL 32274 FIGURE 1-8 CITY STATE ZIP Sample marina data for Alexamara Marina Group Alexamara stores information about the boat owners to whom it rents slips in the OWNER table shown in Figure 1-9. An owner number that consists of two uppercase letters followed by a two-digit number uniquely identifies each owner. For each owner, the table also includes the last name, first name, address, city, state, and zip code.