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Give the reasons for allowing concurrency?
The reasons for allowing concurrency is if the transactions run serially, a short transaction might have to wait for a preceding long transaction to complete, which can lead to unpredictable delays in running a transaction. So concurrent implementation reduces the unpredictable delays in running transactions.
Determine the concept of Process Process: A process transforms the data values. It is represented as ellipse containing a description of transformation. Each procedure has a
Differentiate between a unique key and a primary key. - By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
(a) Explain briefly the three parts of a relational Model. (b) Contrast the following terms with an appropriate example: (i) stored attribute v/s derived attribute (ii) en
Question: Using the data model express the following queries in SQL. (a) Create the Table named "Cinema" and make the cinema_code to be the primary key of the relation and
Why does a DBMS query language is designed? A DBMS query language is designed to support end users who use English-like commands. support in the development of complex applicat
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
Describe the two types of methods for retrieving rows in Python? Fetchone()- Returns the next row as a sequence Fetch all()- Returns the entire result set like a strin
what is inverted and multilist structure
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
The Third Normal Form (3NF) Even though, transforming a relation that is not in 2NF into a number of relations that are in 2NF take out many of the anomalies, it does not neces
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