pleasehelplmao

Sorry i dont know how to explain this properly, but what i'm trying to get across is how do i get sql to select a data type (i dont think thats wording it properly, sorry) which only appears once? Thanks ;p

hi my name is Anna and i have got this problem i am trying to practice sql queries using following database relational modell i know most simple ones but with these ones i got trouble it is about book lybrarry database using oracle. The primary keys are underlined. The foreign …