Problem: Every different DB has its own internal implementation (Flat Files, Index files, etc) which implies that each has to have its own SQL parser (interpretation)
Tatizo: Kila DB mbalimbali ina ndani yake mwenyewe utekelezaji (Files Flat, Ripoti files, nk) ambayo ina maana kwamba kila mmoja ana kuwa na SQL yake mwenyewe parser (tafsiri)