Section 6 Quiz

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Section 6 Quiz(Answer all questions in this section)

1.You need to join the EMPLYEE!"#S$ and EMPLYEES ta%les.$he EMPLYEE!"#S$ ta%le will %e the &irst ta%le in the 'M

clause. All the atched and unatched rows in the EMPLYEESta%le need to %e dis*la+ed. ,hich t+*e o& join will +ou use-

Mar &or e/iew

(1) Points

A le&t outer join

An inner join

A cross join

A ri0ht outer join ()

2orrect

3.,hich quer+ re*resents the correct s+nta4 &or a le&t outer join- Mar &or e/iew

(1) Points

SELE2$ co*an+nae5 orderdate5 total'M custoers cLE'$ #7 orders o7 c.cust!id 8 o.cust!id9SELE2$ co*an+nae5 orderdate5 total'M custoers c:$E #7 orders o

7 c.cust!id 8 o.cust!id9SELE2$ co*an+nae5 orderdate5 total'M custoers cLE'$ :$E #7 orders o7 c.cust!id 8 o.cust!id9

()

SELE2$ co*an+nae5 orderdate5 total'M custoers cLE'$ :$E orders o

7 c.cust!id 8 o.cust!id9

2orrect

;.'or which o& the &ollowin0 ta%les will all the /alues %e retrie/ed e/eni& there is no atch in the other-

Mar &or e/iew

(1) Points


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SELE2$ e.last!nae5 e.de*artent!id5 d.de*artent!nae'M e*lo+ees eLE'$ :$E #7 de*artents d7 (e.de*artent!id 8 d.de*artent!id)9

e*lo+ees ()

de*artent

7either. $he LE'$ :$E #7 liits the /alue to the atchin0de*artent ids.

Name Null? Type

EMPLYEE!#? 7$ 7:LL 7:M


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SELE2$ d.de*artent!id5 e.&irst!nae5 e.last!nae'M e*lo+ees eLE'$ :$E #7 de*artents d,"EE (e.de*artent!id 8 d.de*artent!id)9SELE2$ d.de*artent!id5 e.&irst!nae5 e.last!nae

'M e*lo+ees e#C"$ :$E #7 de*artents d7 (e.e*lo+ee!id 8 d.ana0er!id)9

()

2orrect

B.,hich o& the &ollowin0 data%ase desi0n conce*ts do +ou need in +ourta%les to write "ierarchical queries-

Mar &or e/iew

(1) Points

7on$rans&era%ilit+

Arc

ecursi/e elationshi* ()

Su*ert+*e

2orrectSection 6 Quiz

(Answer all questions in this section)

6. ,hich o& the &ollowin0 data%ase desi0n conce*ts is i*leentedwith a sel& join-

Mar &or e/iew

(1) Points

7on$rans&era%ilit+

Su*ert+*e

Arc

ecursi/e elationshi* ()

#ncorrect. e&er to Section 6 Lesson =.

F. "ierarchical queries can wal %oth $o*?own and


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'alse

2orrect

G. ,hich stateent a%out a sel& join is true- Mar &or e/iew

(1) Points

$a%le aliases cannot %e used to quali&+ ta%le naes.

$he 7A$:AL #7 clause ust %e used.

$a%le aliases ust %e used to quali&+ ta%le naes. ()

A sel& join ust %e i*leented %+ de&inin0 a /iew.

2orrect

D. E/aluate this SELE2$ stateent>

SELE2$ 'M e*lo+ee e5 e*lo+ee ,"EE e.0r!id 8 .e*!id9,hich t+*e o& join is created %+ this SELE2$ stateent-

Mar &or e/iew

(1) Points

a &ull outer join

a sel& join ()

a le&t outer joina cross join

2orrect

1.$he !!!!!!!!!!! join is the A7S#standard s+nta4 used to 0eneratea 2artesian *roduct.

Mar &or e/iew

(1) Points

ALL

2SS () 7A$:AL

':LL

2orrectSection 6 Quiz

(Answer all questions in this section)


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,"E7

:S#7C ()

2orrect

1B.

P?:2$SP?:2$!#? 7:M


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?E


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Section F Quiz(Answer all questions in this section)

6. $o *er&or a /alid outer join %etween ?EPAME7$S and EM

SELE2$ d.de*artent!nae5 e.last!nae'M e*lo+ees e5 de*artents d,"EE

e.de*artent!id 8 d.de*artent!i

e.de*artent!id(H) 8 d.de*arten

e.de*artent!id 8 d.de*artent!i

e.de*artent!id(H) 8 d.de*arten

2orrect

F. ,hich o& the &ollowin0 %est descri%es the &unction o& an outer j

An outer join will return onl+ thos

An outer join will return onl+ data

An outer join will return data onl+

An outer join will return all rows

2orrect

G. You ha/e the &ollowin0 EMPLYEES ta%le>

EMPLYEE!#? 7:M


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7e/er

2orrect

Pa0e 3 o& ;

Section F Quiz(Answer all questions in this section)

11. ,hat is the result o& a quer+ that selects &ro two ta%les %ut inc

A selection o& rows &ro the &irst

A 2artesian *roduct ()

A selection o& atched rows &ro

A s+nta4 error

2orrect

13. $he PA$#E7$S and ?2$S ta%les contain these coluns>

PA$#E7$SPA$#E7$!#? 7:M


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A s+nta4 error

A re*ort containin0 each *atients

A re*ort with 7 du*licate PA$#E

2orrect

1;. E/aluate this SQL stateent>

SELE2$ e.e*lo+ee!id5 e.last!nae5 e.&irst!nae5 d.de*arte'M e*lo+ees e5 de*artents d,"EE e.de*artent!id 8 d.de*artent!id A7? e*lo+ees.d?E


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A 2artesian *roduct ()

2orrect

Pa0e ; o& ;

Section G Quiz(Answer all questions in this section)

1.$he EMPLYEES ta%le contains these coluns>

EMPLYEE!#? 7:M


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3.E/aluate this SELE2$ stateent>

SELE2$ 2:7$()'M e*lo+ees,"EE salar+ I ;9

,hich result will the quer+ dis*la+-

Mar &or e/iew

(1) Points

$he total o& the SALAY colun &or all e*lo+ees that ha/e asalar+ 0reater than ;$he quer+ 0enerates an error and returns no results.

$he nu%er o& e*lo+ees that ha/e a salar+ less than ;

$he nu%er o& rows in the EMPLYEES ta%le that ha/e a salar+0reater than ; ()

2orrect

;.$o include null /alues in the calculations o& a 0rou* &unction5 +ouust>

Mar &or e/iew

(1) Points

Precede the 0rou* &unction nae with 7:LL

2on/ert the null to a /alue usin0 the 7@L( ) &unction ()

2ount the nu%er o& null /alues in that colun usin0 2:7$

Crou* &unctions can ne/er use null /alues

2orrect

=.E/aluate this SQL stateent>

SELE2$ 2:7$ (aount)'M in/entor+9

,hat will occur when the stateent is issued-

Mar &or e/iew

(1) Points

$he stateent will return the total nu%er o& rows in theAM:7$ colun.$he stateent will return the 0reatest /alue in the #7@E7$Yta%le.$he stateent will count the nu%er o& rows in the #7@E7$Yta%le where the AM:7$ colun is not null. ()$he stateent will re*lace all 7:LL /alues that e4ist in theAM:7$ colun.


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2orrect

B.,hat would the &ollowin0 SQL stateent return-

SELE2$ 2:7$(?#S$#72$ salar+)'M e*lo+ees9

Mar &or e/iew

(1) Points

$he total nu%er o& rows in the e*lo+ees ta%le

A listin0 o& all unique salaries in the e*lo+ees ta%le

$he total aount o& salaries in the e*lo+ees ta%le

$he nu%er o& unique salaries in the e*lo+ees ta%le ()

2orrect

Pa0e 1 o& ;


6. $he S$YLES ta%le contains this data>

S$YLE!#? S$YLE!7AME 2A$ECY 2S$

GDBG= SA7?AL GBD= 13.

D6GDB SA7?AL GBDD 1.

G6DB6 SA7?AL GD6D 1B.

GDD LA'E GDDG 1.

GDGD LA'E GDFGD 1=.

GBF6GD "EEL GBD= 11.

FBGD6 SA7?AL G6DFD

You issue this SELE2$ stateent>

SELE2$ 2:7$(cate0or+)'M st+les9

,hich /alue is dis*la+ed-

Mar &or e/iew

(1) Points

$he stateent will 7$ e4ecute success&ull+.

F ()


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6

2orrect

F. :sin0 +our e4istin0 nowled0e o& the e*lo+ees ta%le5

would the &ollowin0 two stateents *roduce the saeresult-

SELE2$ 2:7$()'M e*lo+ees9

SELE2$ 2:7$(coission!*ct)'M e*lo+ees9

Mar &or e/iew

(1) Points

Yes

7o ()

$he second stateent is in/alid

$he &irst stateent is in/alid

2orrect

G. You can use C:P &unctions in all clauses o& aSELE2$ stateent. $rue or 'alse-

Mar &or e/iew

(1) Points

$rue'alse ()

2orrect

D. Ci/en the &ollowin0 data in the e*lo+ees ta%le(e*lo+ee!id5 salar+5 coission!*ct)

?A$A> (1=;5 365 null1==5 3B5 null1=D5 1B5 .31F=5 115 .;1F65 G65 .31FG5 F5 .1B)

,hat is the result o& the &ollowin0 stateent>

Mar &or e/iew

(1) Points


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SELE2$ S:M(coission!*ct)5 2:7$(salar+)'M e*lo+ees,"EE e*lo+ee!id #7( 1=;51==51=D51F=51F651FG)9

S:M 8 1.GB and 2:7$ 8 6

S:M 8 1.GB and 2:7$ 8=

S:M 8 .GB and 2:7$ 8 6 ()

S:M 8 .GB and 2:7$ 8 =

#ncorrect. e&er to Section G Lesson 1.

1. ,hat two 0rou* &unctions can %e used with an+datat+*e-

Mar &or e/iew

(1) Points

2:7$5 S:M

S:M5 A@C

S$??E@5 @A#A72E

M#75 MAO ()

2orrect

Pa0e 3 o& ;


11. ,hich 0rou* &unction would +ou use to dis*la+ the lowest /alu

M#7 ()

2:7$

A@C


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MAO

2orrect

13. $he EMPLYEES ta%le contains these coluns>

EMPLYEE!#? 7:M (1=;5 365 null1==5 3B5 null1=D5 1B5 .3


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1F=5 115 .;1F65 G65 .31FG5 F5 .1B)

,hat is the result o& the &ollowin0 stateent>

SELE2$ A@C(coission!*ct)'M e*lo+ees,"EE e*lo+ee!id #7( 1=;51==51=D51F=51F651FG)9

.313B ()

1.313B

.=3B

$his stateent is in/alid

2orrect

1B. ,hich 0rou* &unctions %elow act on character5 nu%er5 and dat

(2hoose all correct answers)

A@C

S:M

2:7$ ()

MAO ()

M#7 ()

2orrect

Pa0e ; o& ;

Section D Quiz(Answer all questions in this section)

1. $he P?:2$S ta%le contains these coluns>

P?:2$!#? 7:M


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2A$ECY!#? @A2"A3(1)L2A$#7!#? 7:M


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SELE2$ 2:7$(*a+ent!id)'M *a+ent,"EE *a+ent!date


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()

2orrect

=. You want to write a re*ort that returns the a/era0e salar+ o& all e*lo+e$he EMPLYEES ta%le contains the &ollowin0 coluns>

EMPLYEES>EMP!#? 7:M


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You want to create a re*ort that includes each e*lo+ees last nae5 e*,hich o& the &ollowin0 SELE2$ stateents will acco*lish this tas-

SELE2$ e*lo+ee!id5 last!nae5 hire!da'M e*lo+ees,"EE salar+ I =A7? (s+sdatehire!date) ;6B I 19

()

SELE2$ e*lo+ee!id5 last!nae5 hire!da'M e*lo+ees,"EE salar+ I = A7? hire!date 8

(SELE2$ hire!date

'M e*lo+ees,"EE (s+sdatehire!date) ;6B I 1)9SELE2$ e*lo+ee!id5 last!nae5 salar+'M e*lo+ees,"EE salar+ I =A7? hire!date 8

(SELE2$ hire!date'M e*lo+ees,"EE (s+sdatehire!date) ;6B I 1)9

SELE2$ e*lo+ee!id5 last!nae5 salar+'M e*lo+ees,"EE salar+ I =A7? hire!date #7 (s+sdatehire!date) ;6

2orrect

Pa0e 1 o& ;

Section D Quiz(Answer all questions in this section)

6. E/aluate this SELE2$ stateent>

SELE2$ 2:7$(e*lo+ee!id)5 de*artent!id'M e*lo+eesC:P


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stateent-

,"EE salar+ I 1B ()

"A@#7C S:M(salar+) I 1B,"EE S:M(salar+) I 1B

"A@#7C salar+ I 1B

2orrect

F. $he di&&erence %etween :7#7 and :7#7 ALL is Mar &or e/iew

(1) Points

$here is no di&&erence9 +ou 0et e4actl+ the saeresult &ro %oth.:7#7 ALL is ore lie a 7A$:AL #7.

:7#7 will reo/e du*licates9 :7#7 ALL returnsall rows &ro all queries includin0 the du*licates. ():7#7 is a s+no+ &or :7#7 ALL.

2orrect

G. ,hen usin0 SE$ o*erators5 the nu%er o& coluns andthe data t+*es o& the coluns ust %e identical in all o&the SELE2$ stateents used in the quer+. $rue or 'alse.

Mar &or e/iew

(1) Points

$rue ()

'alse

2orrect

D. ,hich o& the &ollowin0 are correct SE$ o*erators-(choose two)

Mar &or e/iew

(1) Points

(2hoose all correct answers)

:7#7 ALL5 PL:S ALL

:7#7 ALL5 #7$ESE2$ ()

M#7:S5 PL:S

:7#75 M#7:S ()


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2orrect

1. #& +ou want to include su%totals and 0rand totals &or allcoluns entioned in a C:P


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1;. E4aine the &ollowin0 stateent>

SELE2$ de*artent!id5 ana0er!id5 jo%!id5 S:M(salar+)'M e*lo+eesC:P

*roduce a sin0le result set

*roduce su%total /alues ()

crossta%ulate /alues

2orrect

1B. You use C:P#7C &unctions to>

A00re0ate rows usin0 S:M5 M#7

#denti&+ the e4tra row /alues creat

Produce su%total and crossta%ula

2orrect

Pa0e ; o& ;

Section 1 Quiz


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'alse- (1) Points

$rue ()

'alse

2orrect

D. ,hich stateent is &alse- Mar &or e/iew

(1) Points

$he ,#$" clause stores the results &or the user who runs thequer+.$he ,#$" clause retrie/es the results o& one or ore quer+ %locs.$he ,#$" clause decreases *er&orance. ()

$he ,#$" clause aes the quer+ si*le to read.

2orrect

1.$he EMPLYEES and ?ES ta%les contain these coluns>

EMPLYEESEMPLYEE!#? 7:M


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1=.#& a sin0lerow su%quer+ returns a null /alue and uses the equalit+co*arison o*erator5 what will the outer quer+ return-

Mar &or e/iew

(1) Points

All the rows in the ta%leAn error

A null /alue

7o rows ()

2orrect

1B.Su%queries are liited to &our *er SQL transaction. $rue or 'alse- Mar &or e/iew

(1) Points

$rue

'alse ()

2orrect

Pa0e ; o& ;

Section 6 Quiz

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