索引 さくいん順次 じゅんじアクセス方式 ほうしきであれば
sakui n junji akusesuhōshikideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 索引順次アクセス方式

1. If it were sequential access method; If sequential access method were the case

Ba Conditional
Computing