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What is called a query evaluation plan?
A sequence of primitive operations that can be used to assess a query is a query evaluation plan or a query implementation plan.
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
Explain the steps for reduction of E-R model into relational model. Ans:(a) Entity set in E-R model will be considered as table name in relational Model. (b) Attributes of e
Wait-die" scheme : The idea is based on non-preventive method. It is based on a simple rule: If Ti requests a database resource that is held by T
In the architecture of a database system which external level used? In the architecture of a database system view external level used.
Clustering Indexes It may be an excellent idea to keep data of the students in the order of the programme they have registered as most of the data file accesses may need studen
What is a database? At any given time, they're storing a tremendous amount of information - inventory, in the case of Amazon, messages and interrelationships in the case of Tw
what is natural join?
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an ex
Explain TPS concurreny executions stating their advantages in online business advancement
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