Oracle Database 11g SQL by Jason Price

By Jason Price

It's occasionally acknowledged that the genuine task of an Oracle database administrator might be summed up in a single, crucial ability: with a view to get better your database.There's a lot knowledge in that assertion. Of the whole lot you're accountable for as a database administrator, not anything is extra very important than the information itself. love it or now not, the fearsome accountability of shielding your firms most important information falls squarely upon your shoulders:
- Lose that info and your organization may perhaps fail.
- Lose that information and also you will be out of a job.Scared? you have to be. yet theres support. you're not by myself. Oracle specialists Darl Kuhn, Sam Alapati, and Arup Nanda have come jointly during this publication to teach you the facility of restoration supervisor, or RMAN, that's Oracles backup and restoration software of selection. RMAN Recipes for Oracle Database 11g is helping you're taking good thing about all that RMAN has to supply through supplying easy-to-understand strategies to business-critical backup and restoration operations. this useful guide
- Demystifies the stairs required to guard your enterprise data
- presents ready-made and step by step ideas to basic and intricate backup, restoration, and restoration operations
- Is task-oriented, making it effortless so you might find the answer to urgent backup and restoration problems
- Respects a while by means of supplying example-based suggestions, now not never-ending analyzing materialWhen the pressure's on, you dont have time for lengthy discussions of thought. This publication will get correct to the purpose with fast and easy-to-read, step by step strategies that could assist you backup and recuperate your information with confidence.

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Chapter 1: Introduction 3 Of course, every database must have some way to get data in and out of it, preferably using a common language understood by all databases. Database management systems implement a standard language known as Structured Query Language, or SQL. Among other things, SQL allows you to retrieve, add, modify, and delete information in a database. Introducing the Structured Query Language (SQL) Structured Query Language (SQL) is the standard language designed to access relational databases.

Permissions are granted by a privileged user (for example, the system user) using the GRANT statement. The following example grants the connect and resource permissions to store: GRANT connect, resource TO store; Once a user has been created, the database tables and other database objects can be created in the associated schema for that user. Many of the examples in this book use the store schema. Before I get into the details of the store tables, you need to know about the commonly used Oracle database types.

The EXCEPTION block in the previous example performs a ROLLBACK if an exception is thrown in the code. Summary In this chapter, you have learned the following: ■ A relational database is a collection of related information that has been organized into structures known as tables. Each table contains rows that are further organized into columns. These tables are stored in the database in structures known as schemas, which are areas where database users may store their objects (such as tables and PL/SQL procedures).

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