CREATE TABLE table_203_7 (id DECIMAL, "pos." DECIMAL, "artist" TEXT, "single" TEXT, "year" DECIMAL, "sales" DECIMAL, "peak" DECIMAL)

how many artists had sales above 900,000 ?
SELECT COUNT("artist") FROM table_203_7 WHERE "sales" > 900000
SELECT COUNT("artist") FROM "table_203_7" WHERE "sales" > 900000