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How to joining 3 table have same field in common
Table 3: (fact table)
No, there is no need to join the tables. Do you really need the Version and Ins_date fields in your model, they look like audit fields only? If not, simply remove them from your load script.
If you do really need them, then add a qualify:
Qualify Version, Ins_date;
... your script as posted in your question (unchanged) ...