我有3张桌子，
auctions
+----+----------+
| ID | NAME |
+----+----------+
| 1 | Lelang 1 |
+----+----------+
| 2 | Lelang 2 |
+----+----------+
| 3 | Lelang 3 |
+----+----------+
levels
+----+---------+
| ID | NAME |
+----+---------+
| 1 | Level 1 |
+----+---------+
| 2 | Level 2 |
+----+---------+
| 3 | Level 3 |
+----+---------+
auction_level
+----+---------+----------+------------+------------+
| ID | AUCT_ID | LEVEL_ID | DATE_START | DATE_END |
+----+---------+----------+------------+------------+
| 1 | 1 | 1 | 2017-01-01 | 2017-01-10 |
+----+---------+----------+------------+------------+
| 2 | 1 | 2 | 2017-01-11 | 2017-01-31 |
+----+---------+----------+------------+------------+
| 3 | 2 | 1 | 2017-01-05 | 2017-01-15 |
+----+---------+----------+------------+------------+
我想选择auctions表的所有条目，并按表DATE_START上Level 1的{{1}}排序。老实说，我不知道如何进行所需的查询，所以我还没有创建任何查询。