slowly changing dimensions-informatica by quontra solutions

8/12/2019 Slowly Changing Dimensions-Informatica by Quontra Solutions

1/26

]lewly Mjdbhnbh Inagbsnebs

Srgsgbtgr?

Tuebtrd ]elutnebsNbferadtnmd Eblnbg Yrdnbnbh

Gadnl?nbfeCquebtrdselutnebs.mea

Mdll Ws?+4 939->33->>::


2/26

Yepnms

Xjdt wgll sgg?

]MI nb IXJ

Xjy5

Xje5 Xjgb5

Jew5

Xg webt sgg?

]MI nb ELDS


3/26

=

Xjy5

Lgts td`g ]dlgs fdmt tdklg fer gxdaplg

Gvgry idy aerg dbi aerg sdlgs td`g pldmg, jgbmg?

Aerg dbi aerg rews drg diigi te tjg fdmt tdklg

Vgry rdrgly drg tjg rews nb tjg fdmt tdklg upidtgi wntj mjdbhgs

Dlse Mebsnigr...

Jew wnll wg dioust tjg fdmt tdklg wjgb mjdbhgs drg adig5


4/26

9

Xjy5 mebt

Mebsnigr tjg inagbsneb tdklgs

Meadprgi te tjg fdmt tdklgs, tjgy drg aerg stdklg dbi lgss veldtnlg

Jewgvgr, ubln`g fdmt tdklgs, d inagbsneb tdklg iegs bet mjdbhg oust

tjreuhj tjg nbmrgdsg ef buakgr ef rews, kut dlse tjreuhj mjdbhgste tjg dttrnkutgs tjgasglvgs


5/26

7

Xje5 Xjgb5

Xje5

Fdmt tdklgs dbi Inagbsneb tdklgs

Xg wnll femus eb (]lewly Mjdbhnbh) Inagbsnebs

Xjgb5

Heei qugstneb?

Nbsnig tjg GYL premgss

Dftgr tjg GYL premgss, ds d stergi premgiurg

Bgvgr (wdnt, yeull sgg)


6/26

6

Jew5

Yjns ns tjg knh qugstneb.

Frea wjdt wg insmussgi fer bew, wg mdb igrnvg tjgsg prnbmnplgs?

Aest inagbsnebs drg hgbgrdlly mebstdbt evgr tnag Adby inagbsnebs, tjreuhj bet mebstdbt evgr tnag, mjdbhg slewly

Yjg preiumt (kusnbgss) `gy ef tjg seurmg rgmeri iegs bet mjdbhg

Yjg igsmrnptneb dbi etjgr dttrnkutgs mjdbhg slewly evgr tnag

Nb tjg seurmg ELYS systga, tjg bgw vdlugs evgrwrntg tjg eli ebgs

Evgrwrntnbh ef inagbsneb tdklg dttrnkutgs ns bet dlwdys tjgdppreprndtg eptneb nb d idtd wdrgjeusg

Yjg wdys mjdbhgs drg adig te tjg inagbsneb tdklgs igpgbi eb

tjg typgs ef mjdbhgs dbi wjdt nbferadtneb aust kg prgsgrvgi nb

tjg IXJ


7/268

Jew5 = Dbswgrs?

Yjg usudl mjdbhgs te inagbsneb tdklgs drg mldssnfngi nbte tjrgg typgs

Yypg 4

Yypg ;

Yypg =

Xg wnll mebsnigr tjg penbts insmussgi gdrlngr wjgb igmninbh wjnmj

typg te usg

Dlse Mebsnigr

Ie wg jdvg te usg tjg sdag typg fer tjg gbtnrg IXJ5

Fer tjg sdag inagbsneb5

Kgferg henbh eb, wg aust tdl` dkeut ebg aerg tjnbh.


8/26:

]urrehdtg @gy

D surrehdtg `gy ns d ubnqug nigbtnfngr fer tjg gbtnty nb tjg aeiglgi

werli

Nt ns be tigrnvgi frea dpplnmdtneb idtd

Nts bet agdbt te kg sjewb eutsnig tjg IXJ

Nts ebly snhbnfnmdbmg ns te dmt ds tjg prnadry `gy

Frgqugbtly nts d sgqugbtndl buakgr (]gqugbmgnb Erdmlg er

Nigbtnty nb ]TL ]grvgr)


9/26>

]urrehdtg @gy, mebt.

Jdvnbh tjg `gy nbigpgbigbt ef dll etjgr meluabs nbsuldtgs tjg

idtdkdsg rgldtnebsjnps frea mjdbhgs nb tjg idtd vdlugs er

idtdkdsg igsnhb (ad`nbh tjg idtdkdsg aerg dhnlg) dbi hudrgbtggs

ubnqugbgss

Fer gxdaplg? Db gapleygg NI ns mjesgb ds tjg bgutrdl (kusnbgss)

`gy ef db gapleygg IXJ. Kgmdusg ef d agrhgr wntj dbetjgr

meapdby, bgw gapleyggs frea tjg agrhgi meapdby aust kg

nbsgrtgi. Yjgrg ns ebg gapleygg wje wer`s nb ketj meapdbngs

Nf tjg `gy ns d meapeubi `gy, oenbnbh ns aerg gxpgbsnvg kgmdusgtjgrg drg aultnplg meluabs te meapdrg. ]urrehdtg `gys drg dlwdys

mebtdnbgi nb d snbhlg meluab


10/2643

Eur gxdaplgFer tjg igaebstrdtneb, wgll usg tjns stdr smjgad?

Erigr fdmt

Sreiumt @gyYnag @gy

Musteagr @gy

]dlgspgrseb @gy

Erigr Ielldrs

Mest IelldrsAdrhnb Ielldrs

]dlg Wbnts

Musteagr

Musteagr @gy

Musteagr Bdag

Musteagr Meig

Adrtndl ]tdtus

Diirgss]tdtg

_np

]dlgspgrseb

]dlgspgrseb @gy

]dlgspgrseb Bdag

Ygrrntery Bdag

[ghneb Bdag

Sreiumt

Sreiumt @gy

Sreiumt BdagSreiumt Meig

Sreiumt Lnbg

Krdbi

YnagYnag @gy

Idtg

Aebtj

Tudrtgr

^gdr


11/2644

Yypg 4 Mjdbhgs

Wsudlly rgldtg te merrgmtnebs ef grrers nb tjg seurmg systga

Fer gxdaplg, tjg musteagr inagbsneb? Anm`gy ]mjrgnkgr -2 An`y ]mjrgnkgr

Dlse Mebsnigr

Xjdt wnll jdppgb wjgb buakgr ef mjnlirgb ns mjdbhgi5


12/264;

Yypg 4 Mjdbhgs, mebt.

Hgbgrdl Srnbmnplgs fer Yypg 4 mjdbhgs?

Wsudlly, tjg mjdbhgs rgldtg te merrgmtneb ef grrers nb tjg seurmg systga

]eagtnags tjg mjdbhg nb tjg seurmg systga jds be snhbnfnmdbmg

Yjg eli vdlug nb tjg seurmg systga bggis te kg insmdrigi

Yjg mjdbhg nb tjg seurmg systga bggi bet kg prgsgrvgi nb tjg IXJ

Dlse Mebsnigr

Xjdt wnll jdppgb wjgb ebly tjg ldst vdlug kgferg tjg mjdbhg ns bggigi5


13/264=

Dpplynbh Yypg 4 mjdbhgs Evgrwrntg tjg dttrnkutg vdlug nb tjg inagbsneb tdklg rew wntj tjg bgw vdlug

Yjg eli vdlug ef tjg dttrnkutg ns bet prgsgrvgi

Be etjgr mjdbhgs drg adig nb tjg inagbsneb tdklg rew

Yjg `gy ef tjns inagbsneb tdklg er dby etjgr `gy vdlugs drg bet dffgmtgi

Gdsngst te naplgagbt

==47944;

Anm`gy ]mjrgnkgr

@4;=76

AdrrngiBghkd 44 ]Y

Musteagr @gy?

Musteagr Bdag?

Musteagr Meig?

Adrtndl ]tdtus?

Diirgss?

==47944;

An`y ]mjrgnkgr

@4;=76

AdrrngiBghkd 44 ]Y

Musteagr Meig?

@4;=76

Musteagr Bdag?

An`y ]mjrgnkgr

Kgferg Dftgr

@gy [gstrumturnbh

@4;=76 -2==47944;

Dlse Mebsnigr

Xjnmj nbigxgs wnll jglp jgrg5

Jew tjg mjdbhg kex wnll dppgdr nb tjg rgdl werli5

Mjdbhg Kex


14/2649

Yypg ; Mjdbhgs

Lgts lee` dt tjg adrtndl stdtus ef An`y ]mjrgnkgr

Ebg tjg IXJs rgqunrgagbts ns te trdm` erigrs ky adrtndl stdtus (nb diintneb te etjgr

dttrnkutgs)

Dll mjdbhgs kgferg 44/43/;339 wnll kg ubigr Adrtndl ]tdtus 1 ]nbhlg, dbi dll mjdbhgs dftgr

tjdt idtg wnll kg ubigr Adrtndl ]tdtus 1 Adrrngi

Xg bggi te dhhrghdtg tjg erigrs kgferg dbi dftgr tjg adrrndhg sgpdrdtgly

Lgts ad`g lnfg jdrigr?

An`y ns lnvnbh nb Bghkd st., kut eb =3/:/;33> jg aevgs te Dvnvna st.


15/2647

Yypg ; Mjdbhgs, mebt.

Hgbgrdl Srnbmnplgs fer Yypg ; mjdbhgs?

Yjgy usudlly rgldtg te trug mjdbhgs nb seurmg systgas

Yjgrg ns d bggi te prgsgrvg jnstery nb tjg IXJ

Yjns typg ef mjdbhg pdrtntnebs tjg jnstery nb tjg IXJ

Gvgry mjdbhg fer tjg sdag dttrnkutgs aust kg prgsgrvgi

Dlse Mebsnigr

Aust wg trdm` mjdbhgs fer dll tjg dttrnkutgs5

Fer wjnmj dttrnkutgs wnll wg trdm` mjdbhgs5 Xjdt drg tjg mebsnigrdtnebs5


16/2646

Dpplynbh Yypg ; mjdbhgs

==47944;

An`y ]mjrgnkgr

@4;=76

]nbhlgBghkd 44 ]Y

Musteagr @gy?

Musteagr Bdag?

Musteagr Meig?

Adrtndl ]tdtus?Diirgss?

74494;=9

An`y ]mjrgnkgr

@4;=76

AdrrngiBghkd 44 ]Y

Musteagr Meig?

@4;=76

Adrtndl ]tdtus(44/43/;339)?

Adrrngi

Diirgss (=3/:/;33>)?

Dvnvna st.

Kgferg Dftgr 44/43/;339

@gy [gstrumturnbh

@4;=76 -2 ==47944;

74494;=9

7;8:>=9;

7;8:>=9;

An`y ]mjrgnkgr

@4;=76

AdrrngiDvnvna st.

Dftgr =3/:/;33>

Dlse Mebsnigr

Xjdt wnll jdppgb nf nb diintneb te Diirgss wg dlse jdvg ]tdtg, znp meig5

Xjdt wnll jdppgb nf tjg musteagr meig wnll mjdbhg5

Mjdbhg Kex


17/2648

Yypg ; mebmluigi

Yjg stgps?

Dii d bgw inagbsneb tdklg rew wntj tjg bgw vdlug ef tjg mjdbhgi dttrnkutg

Db gffgmtnvg idtg wnll kg nbmluigi nb tjg inagbsneb tdklg

Yjgrg drg be mjdbhgs te tjg ernhnbdl rew nb tjg inagbsneb tdklg

Yjg `gy ef tjg ernhnbdl rew ns bet dffgmtgi Yjg bgw rew ns nbsgrtgi wntj d bgw surrehdtg `gy

Dlse Mebsnigr

Xjdt ns tjg idtd typg ef tjg gffgmtnvg idtg meluab5 Aust nt mebtdnb ketj idtg dbi tnag5Jew wnll tjg surrehdtg `gy kg kunlt5

Divdbtdhgs5 Insdivdbtdhgs5


18/264:

Yypg = Mjdbhgs

Bet meaaeb dt dll

Meaplgx qugrngs eb typg ; mjdbhgs ady kg

Jdri te naplgagbt

Ynag-mebsuanbh

Jdri te adnbtdnb

Xg wdbt te trdm` jnstery wntjeut lnftnbh jgdvy kurigb

Yjgrg drg adby seft mjdbhgs dbi wg iebt mdrg fer tjg fdr jnstery


19/26

4>

Yypg = Mjdbhgs

Hgbgrdl Srnbmnplgs?

Yjgy usudlly rgldtg te seft er tgbtdtnvg mjdbhgs nb tjg seurmg systgas

Yjgrg ns d bggi te `ggp trdm` ef jnstery wntj eli dbi bgw vdlugs ef tjg mjdbhgs

dttrnkutg

Yjgy drg usgi te meapdrg pgrferadbmgs dmress tjg trdbsntneb

Yjgy prevnig tjg dknlnty te trdm` ferwdri dbi kdm`wdri


20/26

;3

Dpplynbh Yypg = mjdbhgs

4;=97

Kerns @dv`dz

(bull)

[ddbdbd4/4/4>>:

]dlgspgrseb @gy?

]dlgspgrseb Bdag?

Eli Ygrrntery Bdag?

Murrgbt Ygrrntery Bdag?Gffgmtnvg Idtg?

]dlgspgrseb NI?

[]4>>834

Ygrrntery Bdag?Bgtdbyd

(4;/4/;333)

Kgferg Dftgr

@gy [gstrumturnbh

[]4>>834 -2 4;=97

Dlse Mebsnigr

Xjdt ns tjg gffgmtnvg idtg kgferg tjg mjdbhg5

Mdb tjg eli tgrrnrety meluab mebtdnb bull5 Xjdt dkeut tjg murrgbt tgrrntery5

4;=97

Kerns @dv`dz[ddbdbd

Bgtdbyd4;/4/;333


21/26

;4

Yypg = mebmluigi

Be bgw inagbsneb rew ns bggigi

Yjg gxnstnbh qugrngs wnll sgdalgssly swntmj te tjg murrgbt vdlug

Dby qugrngs tjdt bggi te usg tjg eli vdlug aust kg rgvnsgi dmmerinbhly

Yjg tgmjbnqug wer`s kgst fer ebg seft mjdbhg dt d tnag

Nf tjgrg ns d summgssneb ef mjdbhgs, aerg sepjnstnmdtgi tgmjbnqugs aust kg divnsgi


22/26

;;

Yjgrgs gvgb aerg

Yypg 3 mjdbhgs

Yypg 9usnbh jnstery tdklgs

Yypg 6Jykrni (wjdt dkeut 75)

Yypg 6Dltgrbdtnvg naplgagbtdtneb

]MI nb ELDS


23/26

;=

Mebmlusnebs

= Adnb wdys ef jnstery trdm`nbh

Mjeesg tjg wdy yeui ln`g fer gvgry inagbsneb tdklg

^eu ady meaknbg tjg typgs

Nt dll igpgbis eb tjg systgas rgqunrgagbts


24/26

;9

Knklnehrdpjy

Idtd Xdrgjeusnbh Fubidagbtdls, Sdulrdo Sebbndj, Oejb

Xnlgy Suklnmdtneb

Xn`npgind (]lewly Mjdbhnbh Inagbsneb)


25/26

;7

Tugstnebs5


26/26

;6

Yjdb` yeu

slowly changing dimensions-informatica by quontra solutions

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