CREATE TABLE sampledata15 (sample_pk DECIMAL, state TEXT, year TEXT, month TEXT, day TEXT, site TEXT, commod TEXT, source_id TEXT, variety TEXT, origin TEXT, country TEXT, disttype TEXT, commtype TEXT, claim TEXT, quantity DECIMAL, growst TEXT, packst TEXT, distst TEXT)
CREATE TABLE resultsdata15 (sample_pk DECIMAL, commod TEXT, commtype TEXT, lab TEXT, pestcode TEXT, testclass TEXT, concen DECIMAL, lod DECIMAL, conunit TEXT, confmethod TEXT, confmethod2 TEXT, annotate TEXT, quantitate TEXT, mean TEXT, extract TEXT, determin TEXT)

Which state produce the most organic food?
SELECT state FROM sampledata15 WHERE claim = "PO" GROUP BY state ORDER BY COUNT(*) DESC LIMIT 1
SELECT "state" FROM "sampledata15" WHERE "PO" = "claim" GROUP BY "state" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1