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SQL*Plus is an Oracle tool that lets you enter and run SQL statements and PL/SQL (a procedural extension to the Oracle SQL language) blocks. As a DBA, you can perform all your tasks right from the SQL*Plus interface itself. However, as I explain in the previous Oracle Enterprise Manager section, you may want to make the SQL*Plus interface your secondary, rather than primary, tool for accessing the Oracle RDBMS. SQL*Plus is discussed more in 12.

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As you progress in your career as an Oracle DBA, you ll need to refer to various sources for troubleshooting information and general Oracle and database knowledge I have a couple of recommendations for organizations you may want to make a part of your professional DBA practice: The Oracle Technology Network (OTN) at http://otnoraclecom or http://technetoraclecom is highly useful for DBAs and Oracle developers, and even better, it s free! You ll find everything from online documentation to copies of all Oracle software available freely for download on the OTN The site offers a complete set of Oracle documentation The International Oracle Users Group (IOUG), which you can find on the Web at http:// wwwiougorg/ Membership to this organization will set you back $125 currently, an expenditure that most organizations will reimburse their DBAs for.

identifiers (names for variables, types, and type members) in existing C++ code. As an example, the keyword ref class is used to define a custom CTS class. The following code shows a simple managed type definition: ref class ManagedReferenceType { int aPrivateField; public: void APublicFunction(); }; The CTS supports the definition of various other kinds of types and type members. These will be discussed in 5.

The IOUG holds annual conventions where practitioners in the field present literally hundreds of extremely useful papers IOUG makes these articles available to its members, and the organization also publishes a monthly magazine In addition to the international group, there are several regional Oracle user groups, where users meet in their hometowns and discuss relevant DBA topics For example, the group located in Dallas, Texas, is known as the Dallas Oracle Users Group (http://wwwdougorg/) Oracle Corporation also holds an annual Oracle OpenWorld conference, where several interesting and useful papers are presented You can find session papers from recent OpenWorld conferences by going to the Oracle OpenWorld Archives web site at http://wwworaclecom/openworld/archive.

There are also dozens of sites on the Web today where you can find all kinds of useful information and scripts for managing your databases, as well as help in certifying yourself as an OCP DBA Just go to your favorite search engine, type in the relevant keywords, and you ll be amazed at the amount of help you can get online in seconds Before the proliferation of DBA-related web sites, DBAs had to rely on printed materials or telephone conversations with experts for resolving several day-to-day issues, but that s not the case anymore A great way to enhance your knowledge is to maintain a network of other practicing Oracle DBAs It s amazing how useful these contacts can be in the long run, as they provide a good way to compare notes on new releases and difficult troubleshooting issues that crop up from time to time.

We now back up the shadow file for safety. We want to be able to return to the original file to start over if necessary. Using cp -p will also preserve the original modification time and permissions on the new copy of the file.

There s really no need to reinvent the wheel every time you encounter a problem, and chances are that most of the problems you face have already been fixed by someone else Especially when you re starting out, your friendly Oracle DBA contacts will help you avoid disasters and get you (and your databases) out of harm s way You can find many excellent resources on the Internet to help you when you re stuck or when you need to learn about new features and new concepts The Oracle DBA community has always been a very helpful and cooperative group, and you ll probably learn over time that you can resolve many troublesome issues by getting on the Internet and visiting DBA-related sites You can find hundreds of useful scripts on the Internet, and you re invited to use them.