A jere-tushen tsarin iya dawo da jere a cikin wani guda faifai karanta, alhãli kuwa da yawa faifai ayyukan tattara bayanai daga mahara ginshikan ake bukata daga wani shafi database. Duk da haka, wadannan dukan jere ayyukan ne kullum rare. A mafi yawan lokuta, kawai iyaka subset na bayanai da aka dawo dasu. A cikin wani rolodex aikace-aikace, misali, tattara na farko da na karshe sunayen daga mutane da yawa layuka don gina jerin lambobin sadarwa ne da nisa fiye da na kowa karatu ga wani guda adireshin. Wannan shi ne mafi gaskiya ga rubuta bayanai a cikin database, musamman ma idan da bayanai ne "m" tare da mutane da yawa ginshikan karanta. Domin wannan dalili, mafi yawan jere-tushen tsarin iya dawo da jere a cikin guda faifai karanta, alhãli kuwa da yawa faifai ayyukan tattara bayanai daga mahara ginshikan ake bukata daga wani shafi database.
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