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Explain the Natural join
Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinations of tuples in R and S which are equal on their general attribute names. In this just only one column along attributes comprising similar name is retained.
List and also explain the dissimilar stages of DDLC ?
What is a Built-in A notation of identity is built-into the data model or programming language and no user-supplied identifier is needed. This form of identity is used in objec
Timestamp Ordering Protocol A timestamp is a tag that can be attached to any transaction or any data item, which indicates a specific time on which the transaction or data item
List any eight applications of DBMS. a) Universities b) Airlines c) Banking d) Credit card transactions e) Tele communication f) Sales g)Finance h) Manufac
what is cascading rollback
Multiple column Queries: Syntax: SELECT COLUMN1, COL2,...... FROM TABLE WHERE (COLUMN1, COL2, ...) IN (SELECT COLUMN1, COL2,.... FROM TABLE WHERE );
What are the reasons of bucket overflow? Explain any two methods for solving this problem. Ans: It is general for file structures to be divided into equal-length partitions, k
why are older data base model are being replaced by new data model
explain five responsibilities of DBA?
The basic merits of decomposition. The Advantages of Decomposition 1. Separate person can work on each subsystem. 2. A particular software engineer can specialize in a
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