CREATE TABLE table_25280 ("Constituency" CLOB, "Winner" CLOB, "Party" CLOB, "Margin" FLOAT, "Runner-up a" CLOB, "Party a" CLOB)

How many margins have a winner of S. Singaravadivel?
SELECT COUNT("Margin") FROM table_25280 WHERE "Winner" = 'S. Singaravadivel'
SELECT COUNT("Margin") FROM "table_25280" WHERE "Winner" = 'S. Singaravadivel'