CREATE TABLE table_25370 ("Game" FLOAT, "Date" CLOB, "Team" CLOB, "Score" CLOB, "High points" CLOB, "High rebounds" CLOB, "High assists" CLOB, "Location Attendance" CLOB, "Record" CLOB)

What date was the Piston's record at 23-47?
SELECT "Date" FROM table_25370 WHERE "Record" = '23-47'
SELECT "Date" FROM "table_25370" WHERE "Record" = '23-47'