Thank you David
I understand the meaning of top/parent structure parameter outside the loop or other models much more than before :)
I used a stupid way to go to achieve many times .
After run some debug trace I just found as I reused Find-Datarecord model in table wizard to output some data was to stupid, it contains many useless sql query :(
I have a lot of modeling methods to learn :)
The studio becoming slow was not serious, just click the "-" right top the model will be good.
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