CREATE TABLE table_17438 ("#" FLOAT, "President" TEXT, "Date of birth" TEXT, "Date of inauguration" TEXT, "Age at inauguration" TEXT, "End of term" TEXT, "Length of retirement" TEXT, "Date of death" TEXT, "Lifespan" TEXT)

what's the date of birth with # being 2
SELECT "Date of birth" FROM table_17438 WHERE "#" = '2'
SELECT "Date of birth" FROM "table_17438" WHERE "#" = '2'