Question: What is the margin when K. Balathandayutham is the winner?
SQL: SELECT MAX("Margin") FROM "1-22754491-1" WHERE "Winner" = 'K. Balathandayutham';

Question: What is the margin when Periyakulam is the constituency?
SQL: SELECT "Margin" FROM "1-22754491-1" WHERE "Constituency" = 'Periyakulam';