match a complete data.frame

hello togehter,

how can i match a complete data.frame to another one?

I know i can match one column with that code:

A<-match(data$PJ_ID,project$PROJ_ID)
data$Name<-proj$Name[A]

but how can i match the total data.frame from project to data?
indivduel matching for each column is not very productive....

Thanks.

Mat



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