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Describe Database state in details?
Database state: The actual data within the database at a particular moment in time is known as a database state.
define locking in simple language and decribed it
what are the states of transaction?
Improved Reliability: In a centralised DBMS, a server failure stops the operations of the DBMS. Though, a failure at single site of a DDBMS, or a failure of a communication link cr
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
definition and its work
Demonstrate the UML model Using UML, it is possible to generate code in any of the programming language from UML model (called forward engineering) and rebuild a model from an
Define entity integrity and referential integrity. How does SQL allow specification of these? Ans: Entity Integrity Rule- If the attribute A of relation R is a prime attribut
How does a query tree represent a relational algebra expression? Ans: This includes transforming an initial expression (tree) into an equivalent expression (tree) that is
Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined): 2160_Convert the following ER - diagram into a
What is the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
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