Databases demystified by Andy Oppel

Databases demystified by Andy Oppel

By Andy Oppel

"Now you could layout, construct, and deal with an absolutely sensible database comfortably. completely up-to-date to hide the newest applied sciences and methods, Databases Demystified, moment version supplies the hands-on assist you have to start. Written in a step by step layout, this useful advisor covers equipment that may be used with any database, together with Microsoft entry, MySQL, Microsoft SQL Server, and Oracle. you are going to know about relational database elements, database queries, SQL, the database lifestyles cycle, logical database layout utilizing normalization, and actual database layout. facts and procedure modeling, database protection, on-line Analytical Processing (OLAP), and XML also are covered." -- again hide. learn more... Database basics -- Exploring relational database parts -- Forms-based database queries -- creation to SQL -- The database existence cycle -- Logical database layout utilizing normalization -- info and technique modeling -- actual database layout -- Connecting databases to the skin global -- Database defense -- Database implementation -- Databases for on-line analytical processing -- Integrating XML files and gadgets into databases

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These are called recursive relationships. Any one of the relationship types already presented (one-to-one, one-to-many, or many-to-many) can be a recursive relationship. Figure 2-5 and the following list show examples of each: TERMS: Defining recursive relationship a recursive relationship is a relationship between instances of the same entity such as an employee who reports to another employee or a product part composed of other product parts. If we were to track which employees have other employees as spouses, we would expect each to be married to either zero or one other employee.

The processes involved in database design are covered in Chapter 5. In the sections that follow, we explore first the components of a conceptual database design, and then the components of a logical and physical design. CHAPTER OBJECTIVES In this chapter, the reader should: • Understand conceptual database design components, including entities, attributes, relationships, and business rules. • Understand logical/physical database design components, including tables, columns and data types, constraints, and views.

F. Codd D. Is known for its simplicity of use E. Connects database records using physical address pointers 5. The object-oriented model: A. Was first invented in the 1980s B. Stores data as variables along with application logic modules called “methods” C. Restricts access to variables through encapsulation D. Provides for freeform ad hoc querying of variables E. Provides better support for complex data types than the relational model Chapter 1 D ata b a s e F u n d a m e n ta l s 6. The physical layer of the ANSI/SPARC model: A.

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