Removing duplicate rows (based on values from multiple columns) from SQL table

Question

I have following SQL table:

AR_Customer_ShipTo

+--------------+------------+-------------------+------------+
| ARDivisionNo | Custo         


        

Answer 1

Sample SQL FIDDLE

1) Use CTE to get max ship code value record based on ARDivisionNo, CustomerNo for each Customers

WITH cte AS (
  SELECT*, 
     row_number() OVER(PARTITION BY ARDivisionNo, CustomerNo ORDER BY ShipToCode desc) AS [rn]
  FROM t
)
Select * from cte WHERE [rn] = 1

2) To Delete the record use Delete query instead of Select and change Where Clause to rn > 1. Sample SQL FIDDLE

WITH cte AS (
  SELECT*, 
     row_number() OVER(PARTITION BY ARDivisionNo, CustomerNo ORDER BY ShipToCode desc) AS [rn]
  FROM t
)
Delete from cte WHERE [rn] > 1;

select * from t;