mysql> select distinct date(date_start), date(date_stop) from log_campaign where campaign_id = 1191;
+------------------+-----------------+
| date(date_start) | date(date_stop) |
+------------------+-----------------+
| 2015-04-13       | 2015-04-13      |
| 2015-04-13       | 2015-04-14      |
| 2015-04-14       | 2015-04-14      |
| 2015-04-27       | 2015-04-27      |
| 2015-04-27       | 2015-04-28      |
| 2015-04-28       | 2015-04-28      |
| 2015-04-28       | 2015-04-29      |
| 2015-04-29       | 2015-04-29      |
| 2015-04-29       | 2015-04-30      |
| 2015-04-30       | 2015-04-30      |
| 2015-04-30       | 2015-05-01      |
| 2015-05-01       | 2015-05-01      |
| 2015-05-13       | 2015-05-13      |
| 2015-05-13       | 2015-05-14      |
| 2015-05-14       | 2015-05-14      |
| 2015-05-14       | 2015-05-15      |
| 2015-05-15       | 2015-05-15      |
| 2015-05-15       | 2015-05-16      |
| 2015-05-16       | 2015-05-16      |
| 2015-05-16       | 2015-05-17      |
| 2015-05-17       | 2015-05-17      |
| 2015-05-17       | 2015-05-18      |
| 2015-05-18       | 2015-05-18      |
| 2015-05-18       | 2015-05-19      |
| 2015-05-19       | 2015-05-19      |
| 2015-05-19       | 2015-05-20      |
| 2015-05-20       | 2015-05-20      |
| 2015-05-20       | 2015-05-21      |
| 2015-05-21       | 2015-05-21      |
| 2015-05-21       | 2015-05-22      |
| 2015-05-22       | 2015-05-22      |
| 2015-05-22       | 2015-05-23      |
| 2015-05-23       | 2015-05-23      |
| 2015-05-23       | 2015-05-24      |
| 2015-05-24       | 2015-05-24      |
| 2015-05-24       | 2015-05-25      |
| 2015-05-25       | 2015-05-25      |
+------------------+-----------------+