CREATE TABLE table_20060 ("Class" TEXT, "Wheels" FLOAT, "Date" TEXT, "Builder" TEXT, "No. built" FLOAT, "1919 nos." TEXT, "LMS Class" TEXT, "LMS nos." TEXT)

What is the date of the 279 wheels?
SELECT "Date" FROM table_20060 WHERE "Wheels" = '279'
SELECT "Date" FROM "table_20060" WHERE "Wheels" = '279'