取不连续的号码
字段 phone:

13706143678
13805399290

15633137726
15633137751
15633137795
15633137870
15633137891
15633137897
15633137899
15633137925

14723450975
14923450975

15181362125
15181362128
15181362129
15181362131
15181362135
15181362139

13923450975

号码前六位相同（SUBSTRING (phone,0, 7)）视为连续，要提取 不连续的号码 结果：

13706143678
13805399290
14723450975
14923450975
13923450975

[解决办法]