CREATE TABLE table_20272 ("No." FLOAT, "Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "To par" CLOB, "Margin of victory" CLOB, "Runner ( s ) -up" CLOB)

Name the margin of victory when tournament is algarve open de portugal
SELECT "Margin of victory" FROM table_20272 WHERE "Tournament" = 'Algarve Open de Portugal'
SELECT "Margin of victory" FROM "table_20272" WHERE "Tournament" = 'Algarve Open de Portugal'