Left keep and left join which one is better for performance wise?
I use left keep and left join in qlikview.I saw the difference in datamodel leftkeep keep table separate in datamodel and left join merge the 2 tables into one.but I have a doubt which one give better performance wise.in both whether leftjoin or left keep. which one is better for performance wise? I do not know pls tell me out. which one is give better performance