customer_id,name,email,phone,address,city,state,zip,last_purchase
CUST-A1,Linda Park,linda.park@example.com,,,,,,2025-03-15
CUST-A2,Linda Park,,(555) 123-9999,1234 Oak St,Portland,OR,97201,
CUST-A3,L. Park,linda.park@example.com,(555) 123-9999,1234 Oak Street,,,97201,2026-01-10
CUST-B1,James Wilson,jwilson@example.com,(555) 444-8888,,Austin,TX,,2025-11-22
CUST-B2,James Wilson,jwilson@example.com,,789 Pine Ave,Austin,TX,78701,
CUST-C1,Anna Chen,anna.chen@example.com,,,,,,2024-08-01
CUST-C2,Anna Chen,anna.chen@example.com,(555) 222-7777,,,,,2025-02-14
CUST-C3,Anna Chen,,(555) 222-7777,456 Elm Dr,Seattle,WA,,2025-09-30
CUST-C4,A Chen,anna.chen@example.com,(555) 222-7777,456 Elm Drive,Seattle,WA,98101,2026-03-20
CUST-D1,Ricardo Lopez,rlopez@example.com,(555) 666-1212,999 Maple Ln,Denver,CO,80202,2026-02-05
CUST-E1,John A Brown,jabrown@example.com,(555) 111-3333,111 First St,Boston,MA,02101,2026-01-05
CUST-E2,John B Brown,jbbrown@example.com,(555) 111-4444,222 Second St,Boston,MA,02102,2026-01-06
CUST-F1,Maria Costa,,,333 Bay Rd,Miami,FL,33101,
CUST-F2,Maria Costa,mcosta@example.com,(555) 777-2222,333 Bay Rd,Miami,FL,33101,2026-04-01
