CREATE TABLE table_23308 ("Game" FLOAT, "Date" CLOB, "Opponent" CLOB, "Score" CLOB, "High points" CLOB, "High rebounds" CLOB, "High assists" CLOB, "Location" CLOB, "Record" CLOB)

On how many different dates was a game against Houston played?
SELECT COUNT("Date") FROM table_23308 WHERE "Opponent" = 'Houston'
SELECT COUNT("Date") FROM "table_23308" WHERE "Opponent" = 'Houston'