Essay about Dmbs Definition
Each DBMS file has the following structure: * General - contains general information about the database, without any categories (see General Category). All items defined in the General category apply to all database objects. * Script - used for generation and reverse engineering. Contains the following sub-categories: * SQL - contains the following …show more content…
A DBMS has a property page available when you click the root node in the tree view. The following properties are defined: * Triggers Templates, Trigger Template Items, and Procedure Templates
The DBMS Trigger templates, Trigger template items, and Procedure templates are accessible via the tabs in the Resource Editor window. In addition, for Oracle, there is a tab for database package templates.
Heap File Organization
When a file is created using Heap File Organization, the Operating System allocates memory area to that file without any further accounting details. File records can be placed anywhere in that memory area. It is the responsibility of the software to manage the records. Heap File does not support any ordering, sequencing, or indexing on its own.
Sequential File Organization
Every file record contains a data field (attribute) to uniquely identify that record. In sequential file organization, records are