user: Question: What is the original airdate of the episode that had 8.23 million viewers?
Columns: ['Episode #', 'Series #', 'Title', 'Director', 'Writer', 'Original airdate', 'Viewers (in millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [11.0, 2.0, '"Puppy Love"', 'Michael Owen Morris Category:Articles with hCards', 'Len Collin Category:Articles with hCards', '2 Cannot handle non-empty timestamp argument! 1999', '8.23']
SQL:

assistant: SELECT "Original airdate" FROM "Table" WHERE "Viewers (in millions)" = '8.23';