
motham (daatta warehouse)

valia koottam daattakalile saadhaarana chodyangalkkulla utharangal nalkaan edukkunna samayam kuraykkunnathinu dattaa warehouseukalude dimensional modalukalil upayogikkunna oru tharam sangrahamaanu aggregate. oru daatta warehousinte prakadanatthil aggregettukalkku ithrayum naadakeeyamaaya vardhanavundaakkaan kaaranam oru chodyathinu utharam nalkumbol axus cheyyenda varikalude ennam kuraykkuka ennathaanu.
upayogikkuka.
ettavum lalithamaaya roopathil oru samuchayam ennathu oru "group bye" ezz. kyu. ell. kwari nadathikkondu uruthirinjedukkaavunna oru lalithamaaya sangrahappattikayaanu. oru alavu edukkukayum eee alavile granularity maattukayum cheyyuka ennathaanu aggregettukalude kooduthal saadhaaranamaaya upayogam. alavukalude granularity maattumbol puthiya alavile puthiya dhaanyathinu anuyojyamaaya reethiyil vastutha pattika bhaagikamaayi samgrahikkendathundu, angane eee puthiya thalatthilulla dhaanyathinu anuyojyamaaya puthiya alavilullathum vasthuthayullathumaya pattikakal srishtikkunnu.
design.
puthiya motham pattikakalil sambharichirikkunna, saadhaaranayaayi munkootty kanakkukoottappetta, bhaagikamaayi sangrahicha daattayaayathinaal, aggregettukale chilappol pree-kanakkukoottal sangraha daatta ennu vilikkunnu. vasthuthakal samaaharikkumbol, athu onnukil alavukal illaathaakkukayo allengil vasthuthakale oru valanja alavumaayi bandhappeduthukayo cheythaanu cheiyunnathu. uruttiya alavukal granular adisthaana vasthuthakalumayi bandhapetta alavukalude churukkia pathippukalayirikkanam. eee reethiyil, samyojitha alavukal adisthaana alavukalkku anusrithamaayirikkanam.
prakadanam.
1996-ll, dattaa warehousinginte yadhaartha aarkkidekttukalil oralaayi parakke kanakkaakkappedunna ralph kimbol prasthaavichu
"oru valia dattaa warehouseile prakadanatthe baadikkunnathinulla ettavum naadakeeyamaaya maargam praadhamika adisthaana rekhakalumaayi sahavarthikkunna sariyaaya koottam motham (sangraham) rekhakal nalkuka ennathaanu. chila sandarbhangalil nooro aayiramo gadakangalaal vegathilulla chodyangal kondu, mothangal prakadanatthil valare kaaryamaaya swaadheenam cheluthum. atharam athbhuthakaramaaya nettangal koyyan mattu maargangalonnumilla."
sankeernnatha.
aggregettukalum aattomik daattayum ullathinaal dimensional modalinte sankeernnatha vardhikkunnu. eee sankeernnatha dattaa warehousinte upayokthaakkalkk suthaaryamayirikkanam, athinaal oru abhyarthana nadathumbol, dattaa warehouse sariyaaya daanyam upayogichu table ninnulla daatta thirike nalkanam. athinaal dattaa warehouseilekku abhyarthanakal nadathumbol, sariyaaya daanyam upayogichu sariyaaya table nirnnayikkaan sahaayikkunnathin motham naavigettar pravartthanam nadappilaakkanam. 
saadhyamaaya ellah alavukaludeyum samyojanam adisthaanamaakkiyaanu saadhyamaaya samaaharanangalude ennam nirnnayikkunnath. saadhyamaaya ellah kootticherkalukalum nirmmikkunnathin ithu dhaaraalam overhead srishtikkunnathinaal, samaharanam nadatthaan pattikakalude oru upavibhagam thiranjedukkunnathu nallathaanu. eee upavibhagam thiranjedukkunnathinum eathu samuchayangal nirmmikkanamenn theerumaanikkunnathinumalla ettavum nalla maargam anweshana paattenukalumaayi poruthappedunnathinu anweshanangalum roopakalpanayum nireekshikkuka ennathaanu.
motham navigettan.
dimensional modalil motham daatta undaayirikkunnathu paristhithiye kooduthal sankeernamaakkunnu. eee adhika sankeernnatha upayokthaavin suthaaryamaakkunnathin, sariyaaya graine levalinoppam dimensional, fact tableukal anweshikkaan aggregate naavigeshan ennariyappedunna pravartthanam upayogikkunnu. cheruthum mothathilullathumaaya oru pattika upayogichu utharam nalkaan kazhiyumo ennu arian aggregate naavigeshan pradhaanamaayum chodyam parishodhikkunnu.
motham naavigettarmaarude nadappaakkal vividha saankethikavidyakalil kaanaam
aadya moonnu saankethikavidyakalil eathenkilum onnu upayogikkaan saadhaaranayaayi shupaarsha cheiyunnu, kaaranam pinneedulla kesil nettangal orotta frond end bii upakaranathil parimithappedutthiyirikku.

