Search results
Database Modeling and Design. 3rd Edition. Toby J. Teorey University of Michigan. Lecture Notes. Contents. I. Database Systems and the Life Cycle. Introductory concepts; objectives of Relational database life cycle 3 Characteristics of a good database design. II. Requirements Analysis (Chapter. III. Entity-Relationship (ER) Modeling 11.
Part 2: Set Operations and Aggregates by David Toman University of Waterloo. 2 Complex Queries in SQL. 3 Set Operations at Glance. 4 Example: Union. 5 Example: Set Difference.
17 sie 2023 · An overview of the 20 basic SQL query examples that every SQL beginner should master before going to the more advanced SQL concepts.
Primary Key. Removing Redundant Attributes in Entity Sets. Reducing ER Diagrams to Relational Schemas. Extended E-R Features. Entity-Relationship Design Issues. Alternative Notations for Modeling Data. Other Aspects of Database Design. Design Phases. Initial phase -- characterize fully the data needs of the prospective database users.
A complete design example • Information about parts and assemblies for a manufacturing company; e.g.: – A bicycle consists of one frame and two wheels; the cost of assembly is $30 – A frame is just a basic part – A wheel consists of one tire, one rim, and 48 spokes; the cost of assembly is $40 – Everything has a part ID and a name
This course examines information about database system architecture, the system catalog, query processing and optimization, transaction processing concepts, concurrency control techniques, database recovery techniques, database security and authorization, object-Oriented and object-relational databases, distributed databases and client server ...
In this chapter, I cover the following topics: Aspects of query design that affect performance. How query designs use indexes efectively. The role of optimizer hints on query performance. The role of database constraints on query performance.
