data test;
set d9;
len1=klength(聯(lián)系手機(jī));
len2=length(聯(lián)系手機(jī));
customer_id_1=ksubstr(聯(lián)系手機(jī),1,len1);
run;
data test;
set test;
len3=length(customer_id_1);
run;
data test_1;
set test;
if len2^=len3;
/*keep customer_id customer_id_1;*/
run;
