CREATE TABLE table_938 ("Number" FLOAT, "Astronaut" TEXT, "Agency" TEXT, "Total EVAs" FLOAT, "Total Time Hours:Minutes" TEXT)

How many different total EVAs are there for the walk that lasted 45:34?
SELECT COUNT("Total EVAs") FROM table_938 WHERE "Total Time Hours:Minutes" = '45:34'
SELECT COUNT("Total EVAs") FROM "table_938" WHERE "Total Time Hours:Minutes" = '45:34'