CREATE TABLE table_23549 ("#" CLOB, "Original title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original airdate" CLOB, "Prod. code" CLOB)

How many numbers have the product code of 2.6?
SELECT "#" FROM table_23549 WHERE "Prod. code" = '2.6'
SELECT "#" FROM "table_23549" WHERE "Prod. code" = '2.6'