user: Question: Record of 12–15 happened on what date?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['April 1', '@ Padres', '1–2', 'Backe (0–1)', 20825.0, '0–2']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Record" = '12–15';