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What is E-R model?
This data model is based on real world that having of basic objects called entities and of relationship between these objects. Entities are explained in a database by a set of attributes.
Differentiate strict two phase locking protocol and rigorous two phase locking protocol. In strict two phase locking protocol all exclusive mode locks taken by a transaction is
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
Database Manager It is the interface among low-level data, queries and application programs. Databases typically need a large amount of storage space. It is kept on disks, as
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
The Incident table, with an auto-incrementing incident number, etc, looks like: incident_num reporter date time incide
Submission Requirements All answers must be computer generated (including text and diagrams). The hand-in version must include a header page (or with sufficient space)
What is the use of integrity constraints? Integrity constraints make sure that changes made to the database by authorized users do not result in a loss of data consistency. The
What are called journaling file systems? File systems that support log disks are known as journaling file systems.
(a) Why did SAP introduce the extended star schema?
What is Candidate Key Super Key or Candidate Key: It is such an attribute of a table that can uniquely recognize a row in a table. Generally they have unique values and can n
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