By Jennifer Widom, Jeffery D. Ullman
Enormous due to Leo over at MAM for this rip
For Database structures and Database layout and alertness classes provided on the junior, senior, and graduate degrees in computing device technology departments.
Written through recognized machine scientists, this obtainable and succinct advent to database platforms specializes in database layout and use. The authors offer in-depth assurance of databases from the perspective of the database clothier, consumer, and alertness programmer, leaving implementation for later classes. it's the first database structures textual content to hide such issues as UML, algorithms for manipulating dependencies in kinfolk, prolonged relational algebra, Hypertext Preprocessor, 3-tier architectures, info cubes, XML, XPATH, XQuery, XSLT.
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Additional info for A First Course in Database Systems (3rd Edition)
9 is a revision of Fig. 8 that reflects this change. We could also substil lite UNIQUE for PRIMARY KEY in this declaration. If we did so. then two or more tuples could have NULL as the value of name, but there could be no other duplicate values for t his attribute. 9: Making name the key Alternatively, we can use a separate definition of the key. The resulting schema declaration would look like Fig. 10. Again. UNIQUE could replace PRIMARY KEY. 10: A separate declaration of the key 36 CHAPTER 2.
Laid language for relational databi SQL. We Btudj both the basics and important special topics, including constraint specificati md triggers (active database elements), indexes and Other StrUCtUP tO enhaiK performance, forming SQL into transactions, and security and privacy of data in SQL. We also discuss how SQL LS used in complete systems. It is typical to combine SQL with a conventional or host language and to pass data between the database and the conventional program via SQL calls. We discuss a numb of ways to make this connection, including embedded SQL, P< tl Stored Modules (PSM), Call-Level Interface (CLI), Java Databa Lnterconnectivity (JDBC), and PHP.
A DBMS make make other distinctions between the two terms, if it wishes. 6: Let us reconsider the schema for relation MovieStax. Since no star would use the name of another star, we shall assume that name by itself forms a key for this relation. Thus, we can add this fact to the line declaring name. 9 is a revision of Fig. 8 that reflects this change. We could also substil lite UNIQUE for PRIMARY KEY in this declaration. If we did so. then two or more tuples could have NULL as the value of name, but there could be no other duplicate values for t his attribute.