Oracle sql tuning

This workshop covers: Creating tables and sequences Modifying data in the tables Modifying table definitions Creating views Writing scripts containing SQL and iSQL*Plus commands Generating a simple report

14p trinh02 28-01-2013 74 4   Download

Built-In Database Objects In addition to creating the database files, several other structures are created. Data dictionary: Contains descriptions of the objects in the database Dynamic performance tables: Contains information used by the database administrator (DBA) to monitor and tune the database and instance PL/SQL packages: Program units adding functionality to the database. These packages are created when the catproc.sql script is run after the CREATE DATABASE command. PL/SQL packages will not be discussed within the scope of this course.

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In either case, the easiest way is to drop the entire tablespace that contains the datafile. The steps that are to be executed from within SQL*Plus are: 1. STARTUP MOUNT 2. For each deleted datafile, issue the command ALTER DATABASE DATAFILE ’full path of filename’ OFFLINE [DROP]; Note: You must use the DROP option if the database is in NOARCHIVELOG mode, because you cannot recover this file if you apply incomplete media recovery on it via the command ALTER DATABASE OPEN RESETLOGS. See the SQL Reference for details. 3. ALTER DATABASE OPEN; 4.

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