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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.
Find out the names and company names of all employees sorted in ascending order of company name and descending order of employee names of by which company. SELECT EMPLOYEE_NAME,
How to create values of structured type? Constructor functions are used to make values of structured types. A function with the similar name as a structured type is a construct
What is view in SQL? How is it defined? Any relation that is not part of the logical model, but is made visible to a user as a virtual relation is known as a view. We descri
Which component is not included in database environment ? A users component is not included in database environment.
what should be included in this???
Write short notes on relational constraints? Relational Constraints are: 1. NOT NULL 2. Unique 3. Primary key 4. Foreign key 5. Table check
What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
List and also explain the dissimilar stages of DDLC ?
what is natural join?
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