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Give the general form of SQL query?
Select A1, A2............., An
From R1, R2..............., Rm
Where P
What are stored and derived attributes? Stored attributes: The attributes keeps in a data base are known as stored attributes. Derived attributes: The attributes that are de
You are required to program (in a high level language such as C, C++, Java) and implement a cache simulator which will have the following inputs and outputs:- INPUTS
Define tuple variable Tuple variable is a type of variable whose domain is the set of all tuples.
A file of employee have 10,000 blocks on a cylinder of a disk with characteristics r=8ms and btt=0.6ms I want to know the cost of read inthe file under following conditions for a q
what is the need of a log in dbms
If the insertion violates one or more constraints, then two alternatives are available: Default option: - Insertion can be discarded and the reason of refusal can also be ex
Consider the relations City (city_name, state) Hotel (name, address) City_hotel (hotel_name, city_name, owner) Answer the following queries in relational algebra (i) Find
Why older data models are being replaced by new data modelling 100 words accepted#
explain cascading rollback
Give the two reasons for allowing concurrency
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