Database Management Systems Mcqs

Page No. 16

In rank() function if one value is shared by two tuples then


aThe rank order continues as counting numbers


bThe rank order continues by leaving one rank in the middle


cThe user specifies the order


dThe order does not change



Ranking of queries is done by which of the following?


aGroup by


bOrder by


cHaving


dBoth Group by and Order by


View Answer Order by

Any recursive view must be defined as the union of two subqueries: a _______ query that is nonrecursive and a __________ query.


aBase, recursive


bRecursive, Base


cBase, Redundant


dView, Base


View Answer Base, recursive

Which one of the following is the right syntax for DECODE?


aDECODE (search, expression, result [, search, result]… [, default])


bDECODE (expression, result [, search, result]… [, default], search)


cDECODE (search, result [, search, result]… [, default], expression)


dDECODE (expression, search, result [, search, result]… [, default])



What do data warehouses support?


aOLAP


bOLTP


cOLAP and OLTP


dOperational databases


View Answer OLAP

In SQL the cross-tabs are created using


aSlice


bDice


cPivot


dAll of the mentioned


View Answer Slice

The operation of moving from finer-granularity data to a coarser granularity (by means of aggregation) is called a ________


aRollup


bDrill down


cDicing


dPivoting


View Answer Rollup

The process of viewing the cross-tab (Single dimensional) with a fixed value of one attribute is


aSlicing


bDicing


cPivoting


dBoth Slicing and Dicing


View Answer Slicing

The generalization of cross-tab which is represented visually is ____________ which is also called as data cube.


aTwo dimensional cube


bMultidimensional cube


cN-dimensional cube


dCuboid


View Answer Two dimensional cube

Data that can be modeled as dimension attributes and measure attributes are called _______ data.


aMultidimensional


bSingledimensional


cMeasured


dDimensional


View Answer Multidimensional

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