Nvl function helps you convert a null to an actual value.syntax:- nvl (expr1, expr2)in the syntax:expr1 is the source value or expression that may contain a nullexpr2 is the target value for ...

Algumas funções de uso pratico p/ a manipulação de consultas em Oracle - Oracle_Functions/Function NVL_NVL2 at main · leonan624/Oracle_Functions ...

Description A character value that cannot be expressed as a result value is not null was retrieved. When I save it as Excel, "????" expressed in text. When I checked with the nvl function, it wasn't ...