teachCar表
+----+------------------+
| id | customer_base_id |
+----+------------------+
| 1 | 1 |
+----+------------------+
customerBase表
+----+-----------+
| id | name |
+----+-----------+
| 1 | 训练场 |
| 2 | 金洲 |
| 3 | 白坊 |
+----+-----------+
通过这两个表,如何通过jpql语句查询不存在teachCar表内的customerBase对象,请高手帮下小弟
小弟写的这句:SELECT customerBase FROM CustomerBase customerBase WHERE customerBase = (SELECT teachCar FROM TeachCar teachCar WHERE teachCar.customerBase)有问题,请指点