I have data like below.
MODEL PRICE START_DATE_ACTIVE END_DATE_ACTIVE
SONY 100 1/1/1901 12/31/2005
SONY 200 1/1/2006 12/31/2007
SONY 300 1/1/2008 12/31/2008
SONY 400 2/1/2008 12/31/2009
SONY 500 1/1/2009 12/31/2010
The above the model SONY is having the price range that depends on the start_date_active and end_date_active column. For example in the first row, the model SONY price is 100 from 1/1/2006 to 12/31/2007. The same model SONY price is 200 from 1/1/2008 to 12/31/2008. So the model price will come like this. But in some cases the date will be overlapping. See the row number 3 and 4. I should remove the rownumber 4. How can i remove the overlapping date data?
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