Copy data from one table to another based on mulitple joins

madeinstein ,
This sample shows how to copy data from table A to table B based on multiple join columns. 
INSERT INTO B(Value1, Value2)

SELECT DISTINCT Value1, Value2 

FROM A t1 

WHERE NOT EXISTS

(SELECT 1 FROM B t2

 WHERE t1.Value1 = t2.Value1

   AND t1.Value2 = t2.Value2)

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