Expert Oracle9i Database Administration by Sam R. Alapati

By Sam R. Alapati

This 1,000-page booklet allows a newbie or intermediate point Oracle DBA or Oracle Developer/Manager to grasp the paintings of creating and handling advanced Oracle 9i databases.

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Most important, you won't need 1,000 virtually similar rows for Thomas in the customer table if he does place 1,000 different orders! Third Normal Form (3NF) A table is said to be in the 3NF if it is already in the 2NF and every nonkey attribute is fully and directly dependent on the primary key. Right now, you have two tables in the 2NF in this example. Let's add another column attribute called Manager to the two tables and see how that changes things. Each manager attends to one or more customers.

Who are the target users of the database? 32 Chapter 2: Relational Database Modeling and Database Design Chapter 2: Relational Database Modeling and Database Design 33 The design team should evaluate the data that will go into the database and the expected output of the database at this stage. Requirements analysis for the firm involves extensive interviewing of users and management. This stage should yield a clear idea of the expectations of all the concerned parties regarding the new system to be supported by the yet-to-be-created database.

6, (1970): 377–387. Relational Database Life Cycle You can follow a number of methodologies to construct a relational database. In essence, all of them involve similar core steps, with some variations. The essential steps involved in a typical relational database life cycle are as follows: 1. Requirements gathering and analysis 2. Logical database design 3. Physical database design 4. Production implementation You will examine each of these stages in detail in the rest of this chapter. Keep in mind that several different methodologies are in use.

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