Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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Built-In Database ObjectsIn addition to creating the database files, several other structures are created.Data dictionary: Contains descriptions of the objects in the databaseDynamic performance tables: Contains information used by the database administrator (DBA) to monitor and tune the database and instancePL/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...
Nội dung trích xuất từ tài liệu:
Using Data Dictionary and Dynamic Performance Views
