Hello,
I need help with this scenario
I have a millions of records as shown below. I need help how to handle that. Thx
Sample Expected results
customer_id Customer_id
1004405-01 1004405-01
1004405-12
1004405-117
1004405-11
10044325-01 10044325-01
10044650-04 10044650-04
10086785-15 10086785-15
10086785-16
1008800-00 1008800-00
1008800-01
10090326-05 10090326-05
10091690-07 10091690-07