处理数据库重复数据问题

DELETE FROM c_customer_product
WHERE fid IN
(
SELECT fid FROM
(
SELECT fid FROM c_customer_product
WHERE (fcustomer_id,fproduct_id,fis_delete) IN
(SELECT fcustomer_id,fproduct_id,fis_delete
FROM c_customer_product GROUP BY fcustomer_id,fproduct_id,fis_delete HAVING COUNT(*)>1)
AND fid NOT IN
(SELECT MIN(fid) FROM c_customer_product GROUP BY fcustomer_id,fproduct_id,fis_delete HAVING COUNT(*)>1)
) fidresult
)

SELECT fid FROM
(
SELECT fid FROM c_customer
WHERE (fdoctor_id,fhospital_id,fis_delete) IN
(SELECT fdoctor_id,fhospital_id,fis_delete
FROM c_customer GROUP BY fdoctor_id,fhospital_id,fis_delete HAVING COUNT(*)>1)
AND fid NOT IN
(SELECT MIN(fid) FROM c_customer GROUP BY fdoctor_id,fhospital_id,fis_delete HAVING COUNT(*)>1)
) fidresult