CREATE TABLE table_42174 ("Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "Margin of victory" CLOB, "Runner ( s ) -up" CLOB)

What was the margin of victory on Apr 8, 1979?
SELECT "Margin of victory" FROM table_42174 WHERE "Date" = 'apr 8, 1979'
SELECT "Margin of victory" FROM "table_42174" WHERE "Date" = 'apr 8, 1979'