或者：
test
/sample/1/710-70365-26039-0/2?mtid=777&ipn=psmain&kwid=1&ff18=Home
/sample/2/707-40592-7040-0/2?adpos=1o1&MT_ID=42&crlp=27260150694_1
/sample/3/707-40592-7040-0/2?adpos=2t1&MT_ID=42&crlp=31405041964_1
/sample/4/4686-188315-10070-1/2?sr_no=&mpre=http://www.ebay.in/sch
/sample/3/707-40595-7040-0/2?adpos=1s1&MT_ID=43&crlp=35740319460_1
/sample/2/707-40592-7040-0/2?adpos=1o1&MT_ID=42&crlp=24190488954_1
/sample/1/710-35649-5910-0/2?adpos=1s3&mtid=12&MT_ID=12&crlp=28751
/sample/1/710-35650-5910-0/2?adpos=1t4&MT_ID=11&crlp=31627255095_2
SAS:
data test;
set test;
ID=scan(test,3,'/');
run;
