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The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
What is relational model feature? A relational model feature is much more data independence than some other database models.
What are the function of DBA?
What is Trigger? Trigger: A database trigger is procedural code which is automatically executed in response to specific events on a particular table in a database. Triggers can
Define Boyce codd normal form A relation schema R is in BCNF with respect to a set F of functional dependencies if, for all functional dependencies in F + of the form.α ->β.
Explain the Functional Mode with help of an example. Functional Model The functional model shows a computation and functional derivation of data values in it without ind
i am not clear with the climetic condition of the north indian plain. can u plz explain it for me
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
Determine the rule that a value of a foreign key should appear as a value of some particular table is called a Ans: Referential constraint. The rule that a value of a fo
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