/////////////////////目地：ZDJZ_DIS中 name字段有重复的值，删除重复的值
DELETE *
FROM ZDJZ_DIS
WHERE NAME  IN (select NAME from ZDJZ_DIS group by NAME having count(NAME) >1);
上面的做法会删除掉所有的相同的值，包括你想要的，只要重复就删除
 
DELETE *
FROM ZDJZ_DIS
WHERE ID  in (select min(ID) from ZDJZ_DIS group by NAME having count(NAME)>1);
1有没有重复的某项值  2如果有的话，选择ID最小的那个
 
结合起来
DELETE *
FROM ZDJZ_DIS
WHERE NAME  IN (select NAME from ZDJZ_DIS group by NAME having count(NAME) >1)
and ID not in (select min(ID) from ZDJZ_DIS group by NAME having count(NAME)>1);

?