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Define instance and schema?
Instance: Collection of data stored in the data base at a certain moment is
Schema: The overall design of the data base is known as the data base schema.
The result of the UNION operation between R1 and R2 is a relation that includes? The result of the operation between R1 and R2 includes all the tuples of R1 and R2 which have c
What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within
Give a sample of the Dynamic Model. The sample of dynamic model is given below: Dynamic model for the car: Brake and Accelerator Brake or Applies Accelerator
#question.ERD of any car
What is OMR? OMR (Optical Mark Recognition) is the translation of marks - or the absence of marks - but not the shape of the mark on forms that have small circles ("also called
Define Deadlock avoidance These protocols as well ensure that the system will never enter a deadlock state although the way it is done is different from deadlock prevention. I
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
Design an EER schema for the following application and translate the EER schema into relational schemas (and constraints). It is possible that some requirements cannot be captured
Ask question #Minim 100 words accepted#what is recovery management component in database management system and how it is useful
What is theta join explain? Theta Join - The theta join operation is an extension to the natural-join operation which permits us to merge selection and a Cartesian
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