search for: schoolzone_df

I've got two data.frames and, when certain "keys" match, I would like to add the column values from one data frame to the other data.frame. Below I list the two data.frames, i.e. neighborhoodInfo_df, and schoolZone_df. Based on the "address" key I would like to add the "schoolZone" key to the neighborhoodInfo_df data.frame. By any chance is there an R command to accomplish this in one or two steps. I think I could do this in a "for" loop or something, but think there is might b...