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n important part of the Oracle DBA s job is to support developers in creating database objects and, later on, to manage these objects in production systems This chapter will give you a thorough understanding of objects such as tables, indexes, views, sequences, and triggers, which will help in the development process and also in troubleshooting problems during data loads and other situations To create a table, index, or other object, you first need to create tablespaces in your databases The first part of this chapter devotes considerable attention to creating and managing tablespaces Oracle Database 10g introduced several new tablespace concepts, including temporary tablespace groups and bigfile tablespaces You ll learn about these types of tablespaces, as well as default temporary and permanent tablespaces Several special types of tables, such as the temporary tables and external tables, are very useful to the DBA in performing specialized tasks.

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Both of these special tables, as well as index-organized tables and clusters, are discussed in detail in this chapter In this chapter, I also introduce the topic of table partitioning in Oracle Database 10g, which is useful when dealing with large amounts of data I follow this discussion with coverage of index creation and management Indexes have a significant bearing on the performance of database queries, and I provide basic guidelines for creating good Oracle indexes in this chapter You ll find more information on index management in 21, which deals with performance tuning When loading data into tables, an important part of an Oracle DBA s job is managing database constraints and troubleshooting problems caused by table constraints In this chapter, I also provide a summary of all the major types of constraints, constraint states, and their implications.

Managing other database objects, such as views, sequences, and synonyms, is another important part of the Oracle DBA s skill set I explore these topics in detail before concluding the chapter with a discussion of creating and managing materialized views, which are a powerful feature of the Oracle database You ll also learn how to use the new SQL Access Advisor to figure out the proper materialized views for your database You use a particular type of SQL statements called data definition language (DDL) statements, to create and manage Oracle database objects, including tables and indexes As an Oracle DBA, you ll be using DDL SQL statements quite frequently to manage your database However, there are other important types of Oracle SQL statements as well, and I start the chapter by introducing these main types of Oracle SQL statements..

Structured Query Language (SQL) is a relational database access language well known for its ease of use and powerful data-manipulation features. SQL is certified as the standard language for relational database systems by the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO) groups. ANSI introduced the first industry SQL standard in

Then we determine by checking the exclude file whether the current user is one of those exempted from password expiration. If the user is not exempt from password expiration, the script continues on to the core of the program.