D426 V2 DATA MANAGEMENT FOUNDATIONS - SPR2024 LATEST 2026/2027 ACTUAL EXAM QUESTIONS WITH CORRECT ANSWERS 100% VERIFIED GRADED A+

D426 V2 DATA MANAGEMENT
FOUNDATIONS - SPR2024 LATEST
2026/2027 ACTUAL EXAM QUESTIONS
WITH CORRECT ANSWERS 100%
VERIFIED GRADED A+
INSERTmINTOm-
mCORRECTmANSWERmThismclausemnamesmthemtablemandmcolumnsmwheremdatamismtombemadded.mTh


emkeywordmINTOmismoptional.



INSERTm[INTO]mTableNamem(Column1,mColumn2,m...)

VALUESm(Value1,mValue2,m...);



AUTO_INCREMENTm-mCORRECTmANSWERmAmkeywordmthatmdefinesmanmauto-
incrementmcolumn.mThismkeywordmfollowsmthemcolumn'smdatamtypeminmamCREATEmTABLEmstatemen
t.



FullymNULLm-
mCORRECTmANSWERmThismforeignmkeymismamsimplemormcompositemforeignmkeyminmwhichmallmcolumn


smaremNULL



Functionm/mArgumentm-
mCORRECTmANSWERmAmfunctionmoperatesmonmanmexpressionmenclosedminmparentheses,mcalledman


margument,mandmreturnsmamvalue.




Usually,mthemargumentmismamsimplemexpression,msuchmasmamcolumnmnamemormfixedmvalue.mSomemf
unctionsmhavemseveralmarguments,mseparatedmbymcommas,mandmamfewmhavemnomargumentsmatmall
.



Eachmfunctionmoperatesmon,mandmevaluatesmto,mspecificmdatamtypes.

,((Courseminstructormhighlightedmfunctionmtomknow)):

ABS(n)mReturnsmthemabsolutemvaluemofmn

Ex:mSELECTmABS(-5);

m returnsm5



GROUPmBYmclausem-
mCORRECTmANSWERmThismclausemconsistsmofmthem____________m_____mkeywordmandmonemormmo


remcolumns.



Eachmsimplemormcompositemvaluemofmthemcolumn(s)mbecomesmamgroup.mThemquerymcomputesmthe
maggregatemfunctionmseparately,mandmreturnsmonemrow,mformeachmgroup.




Aggregatemfunctionsmaremcommonlymusedmbymthismclause.



AggregatemFunctionm-
mCORRECTmANSWERmThismfunctionmprocessesmvaluesmfrommamsetmofmrowsmandmreturnsmamsummar


ymvalue.



((Courseminstructormhighlightedmfunctionsmtomknow)):

Commonmaggregatemfunctionsmare:

~mCOUNT()mcountsmthemnumbermofmrowsminmthemset

~MIN()mfindsmthemminimummvalueminmthemset

~MAX()mfindsmthemmaximummvalueminmthemset

~mSUM()msumsmallmthemvaluesminmthemset

~mAVG()mcomputesmthemarithmeticmmeanmofmallmthemvaluesminmthemset

,ThesemfunctionsmappearminmamSELECTmclausemandmprocessmallmrowsmthatmsatisfymthemWHEREmclaus
emcondition.mIfmamSELECTmstatementmhasmnomWHEREmclause,mthemaggregatemfunctionmprocessesma
llmrows.



ThesemfunctionsmaremcommonlymusedmwithmthemGROUPmBYmclause.



ASmkeywordm-
mCORRECTmANSWERmTomsimplifymqueriesmormresultmtables,mamcolumnmnamemcanmbemreplacedmwit


hmanmalias.mThemaliasmfollowsmthemcolumnmname,mseparatedmbymanmoptionalmASmkeyword.



viewmtablem/mviewmquerym-
mCORRECTmANSWERmAmviewmtablemismamtablemnamemassociatedmwithmamSELECTmstatement,mcalledm


themviewmquery.



Tablemdesignmismoptimizedmformamvarietymofmreasons,msuchmasmminimalmstorage,mfastmquerymexecut
ion,mandmsupportmformrelationalmandmbusinessmrules.mOccasionally,mthemdesignmismnotmidealmformda
tabasemusersmandmprogrammers.



Viewmtablesmsolvemthismproblem.mViewsmrestructuremtablemcolumnsmandmdatamtypesmwithoutmcha
ngesmtomthemunderlyingmdatabasemdesign.



CREATEmVIEWmstatementm-
mCORRECTmANSWERmThismstatementmcreatesmamviewmtablemandmspecifiesmthemviewmname,mquery,m


andmoptionally,mcolumnmnames.mIfmcolumnmnamesmaremnotmspecified,mcolumnmnamesmaremthemsa
memasminmthemviewmquerymresultmtable.



Attributemminimumm-
mCORRECTmANSWERmThemleastmnumbermofmattributemvaluesmthatmcanmdescribemeachmentityminsta


nce.m

, Ismusuallymspecifiedmasmzerom(optional)mormonem(required).



InmERmdiagrams,mattributemmaximummandmminimummfollowmthemattributemname.mThemminimumm
appearsminmparentheses.



uniquemattributem-
mCORRECTmANSWERmEachmvaluemofmam_____m_______mdescribesmatmmostmonementityminstance.mIs


mnotmthemsamemasmamsingularmattribute.




InmERmdiagrams,m1mindicatesmamuniquemattributemandmMmindicatesmamnon-
uniquemattribute.mThem1mormMmappearsmbeforemthemattributemmaximummandmminimum.



functionalmdependencem-
mCORRECTmANSWERmColumnmAmdependsmonmcolumnmBmmeansmeachmBmvaluemismrelatedmtomatmmo


stmonemAmvalue.mColumnsmAmandmBmmaymbemsimplemormcomposite.m'AmdependsmonmB'mismdenotedm
Bm→mA.



Dependencemofmonemcolumnmonmanothermismcalledmfunctionalmdependence.mFunctionalmdepende
ncemreflectsmbusinessmrules.



dependsmonm-
mCORRECTmANSWERmColumnmAmdependsmonmcolumnmBmwhenmeachmBmvaluemismrelatedmtomatmmos


tmonemAmvalue.mAmandmBmmaymbemsimplemormcompositemcolumns.



heapmtablem-mCORRECTmANSWERmNomordermismimposedmonmrows.



Themdatabasemmaintainsmamlistmofmblocksmassignedmtomthemtable,malongmwithmthemaddressmofmthemf
irstmavailablemspacemforminserts.mIfmallmblocksmaremfull,mthemdatabasemallocatesmamnewmblockmandmi
nsertsmrowsminmthemnewmblock.