By David M. Kroenke, David J. Auer
Get scholars directly to the purpose of database processing. Database Processing displays a brand new instructing approach that will get scholars instantly to the purpose with its thorough and smooth presentation of database processing fundamentals.
The 13th variation has been completely up to date to mirror the newest software program.
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This publication is a short reference for the SQL dialect supported by way of the Teradata Relational Database administration process. The publication can also be a brief connection with the supported information description words for the Teradata RDBMS and the knowledge Dictionary. The viewers for this quickly reference is all clients of Teradata SQL who desire fast, non-detailed information regarding how one can constitution a SQL assertion.
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Additional info for Database Processing: Fundamentals, Design, and Implementation (13th Edition)
After that, we will survey the knowledge that you need to work with databases as an application developer or as a database administrator. Finally, we conclude this introduction with a brief history of database processing. This chapter assumes a minimal knowledge of database use. It assumes that you have used a product such as Microsoft Access to enter data into a Chapter 1 Introduction 3 form, to produce a report, and possibly to execute a query. If you have not done these things, you should obtain a copy of Microsoft Access 2013 and work through the tutorial in Appendix A.
A DBMS controls concurrency by ensuring that one user’s work does not inappropriately interfere with another user’s work. This important (and complicated) function is discussed in Chapter 9. Also, a DBMS contains a security system that ensures that only authorized users perform authorized actions on the database. For example, users can be prevented from seeing certain data. Similarly, users’ actions can be confined to making only certain types of data changes on specified data. Finally, a DBMS provides facilities for backing up database data and recovering it from backups, when necessary.
For example, the following statement queries the Microsoft SQL Server metadata table SYSOBJECTS to determine if a user table (Type = ‘U’) named CLASS exists in the database. If it does, then all the metadata about the table is displayed. SELECT * FROM SYSOBJECTS WHERE [Name]='CLASS' AND Type='U'; Do not be concerned with the syntax of this statement. You will learn what it means and how to write such statements yourself as we proceed. For now, just understand that this is one way that database administrators use metadata.