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Using Data Dictionary and Dynamic Performance Views

Chia sẻ: Lê Trinh | Ngày: | Loại File: PPT | Số trang:20

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Using Data Dictionary and Dynamic Performance Views

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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. Database event triggers: Triggers are procedures that execute implicitly whenever a table or view is modified, or when some user actions or database system actions...

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