By Teorey T.J., Lightstone S.S., Nadeau T., Jagadish H.V.
Database structures and database layout expertise have passed through major evolution lately. The relational facts version and relational database platforms dominate enterprise functions; in flip, they're prolonged by way of different applied sciences like info warehousing, OLAP, and knowledge mining. How do you version and layout your database software in attention of latest expertise or new company wishes? within the generally revised 5th variation, you will get transparent reasons, plenty of fabulous examples and an illustrative case, and the fairly functional recommendation you could have come to count number on--with layout principles which are acceptable to any SQL-based method. yet you are going to additionally get lots that can assist you develop from a brand new database fashion designer to an skilled clothier constructing industrial-sized platforms. In-depth aspect and lots of real-world, useful examples all through Loaded with layout ideas and illustrative case experiences which are acceptable to any SQL, UML, or XML-based procedure instantly important to somebody tasked with the construction of knowledge types for the combination of large-scale company info. Read more... 1. creation 2. The Entity-Relationship version three. Unified Modeling Language (UML) four. necessities research and Conceptual Modeling five. remodeling the Conceptual facts version to SQL 6. Normalization 7. An instance of Logical Database layout eight. item Relational layout nine. XML and internet Databases 10. company Intelligence eleven. CASE instruments Appendix: the fundamentals of SQL
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Extra resources for Database modeling and design: logical design
5 Supertypes and subtypes: (a) generalization with disjoint subtypes, and (b) generalization with overlapping subtypes and completeness constraint. o Employee Customer (b) entities—subtypes in a generalization hierarchy—can be either disjoint or overlapping subsets of the supertype entity. 5 the entity Employee is a higher-level abstraction of Manager, Engineer, Technician, and Secretary, all of which are disjoint types of Employee. The ER model construct for the generalization abstraction is the connection of a supertype entity with its subtypes, using a circle and the subset symbol on the connecting lines from the circle to the subtype entities.
Processes are partitioned into constituent activities along with control flow specifications. This chapter is organized into three main sections. The first section presents class diagram notation, along with examples. The next section covers activity diagram notation, along with illustrative examples. Finally, the last section concludes with a few tips for UML usage. Class Diagrams A class is a descriptor for a set of objects that share some attributes and/or operations. We conceptualize classes of objects in our everyday lives.
8). The concept of a primary key arises in the context of database design. Often, each row of a table is uniquely Car Primary key as a stereotype identified by the values contained in «pk» vin one or more columns designated as mileage the primary key. Objects in software color are not typically identified in this fashion. As a result, UML does not have an Composition example Invoice icon representing a primary key. Howwith primary keys «pk» inv_num ever, UML is extensible. The meaning customer_id of an element in UML may be inv_date extended with a stereotype.
Database modeling and design: logical design by Teorey T.J., Lightstone S.S., Nadeau T., Jagadish H.V.