Hawlgallada in ay dib u soo ceshano dhammaan xogta shayga la siiyo (line oo dhan) waa gaabis. nidaamka ku salaysan line a heli karaa line ee disk hal akhris, halka hawlgallada disk badan si ay u ururiyaan xogta ka columns badan waxaa looga baahan yahay ka database columnar ah. Si kastaba ha ahaatee, hawlgallada line dhan kuwan guud ahaan waa dhif. Xaaladaha intooda badan, kaliya subset kooban oo xogta la soo ceshan. In codsiga rolodex ah, tusaale ahaan, ururin magaca koowaad iyo kan ugu dambeeya ka soo fara badan ee safka si ay u dhisaan liiska xiriirada waa ka badan caadi reading oo dhan, waayo, codsi kasta oo hal. Tani waa ka sii badan run u ah qoraal xogta galay log, gaar ahaan haddii xogta waa "ku fiican" la columns badan oo ku wareegsan. Sababtan, nidaamka ku salaysan line a heli karaa safka hal disk akhris, halka hawlgallada disk badan si ay u ururiyaan xogta ka columns badan ayaa loo baahan yahay ka database columnar ah.
safka ku jihaysan