CREATE TABLE table_17355408_7 (date VARCHAR, high_assists VARCHAR)

Chauncey Billups (6) had a high assist on what date?
SELECT date FROM table_17355408_7 WHERE high_assists = "Chauncey Billups (6)"
SELECT "date" FROM "table_17355408_7" WHERE "Chauncey Billups (6)" = "high_assists"