Hi Sephe, Thank you for answering. I already tried the GDB file and the join field tool. I think what you said makes sense, as the join field tool should reduce the amount of information to be processed. But the result is that it is still extremely slow. (Maybe faster than the exporting way, I never waited that long) The overall purpose is to permanantly join the attributes to the feature, any good way of realizing it? Yulun
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