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What is a primary index?
A primary index is an index whose search key also explains the sequential order of the file.
Having Clause with sub queries: First we have to recollect the GROUP BYclause. The following query searches the minimum salary in every department. SELECT DEPTNO, MIN (SAL)
Lossless-Join Decomposition Let us show an intuitive decomposition of a relation. We require a better basis for deciding decompositions since intuition may not always be r
what do you mean by primary key constraint?
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
What is association? Give an example of association Association is used for establishing relationships among classes. Association describe links among/between classes. For exa
A Relation Schema represented by R(A1, A2, ..., An) is made up of the relation name the list of attributes and R Ai that it contains. A relation is described as a set of tuples
What is a dataset? A dataset is an in-memory database that is disconnected from any regular database, but has all the significant characteristics of a regular database. Dataset
What is DBMS and what are functions of DBMS? DBMS consist of collection of integrated data and set of program to admission those data. The functions performed by a typical
Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
define attribute inheritance with example?
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