如何消除以下SQL数据值的重复？

Question

我需要消除NIC Number重复的情况。请为我提供SQL查询。

Answer 1

DELETE FROM Table_Name A
INNER JOIN (SELECT NIC, COUNT(*) AS RecCount, MIN(RESULT) AS OlderValue 
            FROM Table_Name 
            GROUP BY NIC) b
ON A.NIC = b.NIC 
AND a.RESULT != b.OlderValue

Answer 2

WHILE EXISTS (SELECT NIC FROM TABLE_NAME
              HAVING COUNT(NIC) > 1)
DELETE TOP 1 FROM TABLE_NAME WHERE NIC IN (SELECT NIC FROM TABLE_NAME HAVING COUNT(NIC) > 1) ORDER BY SubjectID DESC