CREATE TABLE table_64591 ("Version" TEXT, "Standard name" TEXT, "Common name" TEXT, "Downstream rate" TEXT, "Upstream rate" TEXT)

What's the standard name with an ADSL2 version and a 01.5 1.5 mbit/s downstream rate?
SELECT "Standard name" FROM table_64591 WHERE "Version" = 'adsl2' AND "Downstream rate" = '01.5 1.5 mbit/s'
SELECT "Standard name" FROM "table_64591" WHERE "Downstream rate" = '01.5 1.5 mbit/s' AND "Version" = 'adsl2'