CREATE TABLE table_79627 ("Race" TEXT, "Dist  ( f ) " FLOAT, "Course" TEXT, "Class" TEXT, "Prize  ( \\u00a3K ) " FLOAT, "Odds" TEXT, "Runners" FLOAT, "Placing" FLOAT, "Margin" TEXT, "Time" TEXT, "Jockey" TEXT, "Trainer" TEXT)

Which Dist (f) has a Race of irish derby?
SELECT "Dist (f)" FROM table_79627 WHERE "Race" = 'irish derby'
SELECT "Dist (f)" FROM "table_79627" WHERE "Race" = 'irish derby'