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Define blocks?
The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
read-set(T) : Each data items that are read by a transaction T Timestamps : for all transaction T, the start-time and the end time are reserved for all the three phases.
explain in details about one to one binary relationship
What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
what are the limitations of dbms?
We require an advanced system for a Sports Centre, you are concerned only with representing the data discussed below about bookings and members. (The complete system may contain ot
Benefits and Limitations od Data Models?
How to create a table from existing table? Create table as e.g, To create a new table ‘N_emp' with employee names and their identification numbers only from employee ta
to develop elrctronic database from manual forms
Differentiate between various levels of data abstraction? Data Abstraction - Abstraction is the procedure to hide the irrelevant things from the users and represent the rele
Synonyms It allows short names or alternative names for objects. Example : CREATE SYNONYM D30 FOR EMPD30; Now if we give command:
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