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What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
What is DML compiler? DML Compiler: Translates DML statements in a query language within low level instructions understandable through the query evaluation engine. Attempts to
Define an abstraction by which relationships are treated as higher level entities Ans: Aggregation. It is an abstraction by which relationships are treated as higher level
Draw an E_R Model for the following: An organization uses number of items of a equipment to generates goods. Each item is at one LOCATION, of one TYPE and has a DETAILED_DISCRI
Define lock? Lock is the most common used to execute the requirement is to permit a transaction to access a data item only if it is currently holding a lock on that item.
why are older data base model are being replaced by new data model
Why is need for the multiple access paths?
What is a virtual table that draws its data from the result of an SQL SELECT statement? View is a virtual table that draws its data from the result of an SQL SELECT statement.
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
write-set(T): Each data items that are written by a transaction T
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