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What are called journaling file systems?
File systems that support log disks are known as journaling file systems.
What is meant by log-based recovery? The most widely used structures for recording database changes is the log. The log is a sequence of log records, recording all the update a
What is an E-R model? Draw an E-R Diagram for the company database with following Descriptions? The company is organized within departments. Each department has a unique name a
A relation has: Relational Schema Relation instance Relational Schema: A relational schema shows the relation's name, its attributes and the domain of every a
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
What is the use of sub queries? A sub query is a select-from-where expression that is nested with in another query. A common use of sub queries is to do tests for set membershi
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The figure below depicts the conceptual diagram of a banking system. (a) Describe one example relevant to the system in figure, for each of the 4 types of enterprise appl
Draw an ER diagram for company''s database schema
What is NULL? Simply NULL means not in value.
what is entity in database system?
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