Question

我想弄清楚这一点，但我一直收到这个错误。我知道它与SELECT和HAVING子句中的子查询有关，但我不知道如何修复它们。任何帮助将不胜感激。

部门表：https://gyazo.com/f9d782abd428acc7ec2e7d5d59befad7

员工表：https://gyazo.com/b2d7d792c0933b13d6fdd7166fffb8a6

预期输出：https://gyazo.com/41f6a5626a5827acbe76e3c41287742d

编辑：我想出了另一种语法！谢谢你的帮助！

    CURSOR c_emp (p_total_emp NUMBER) IS
        SELECT department.DEPARTMENT_NAME                                             
             ,  MAX(employee.HIRE_DATE)                            
             , (SELECT COUNT(EMPLOYEE_ID)
                  FROM employee
                HAVING HIRE_DATE = MAX(HIRE_DATE))
             , ROUND(MAX(employee.SALARY))
             , ROUND(MAX(employee.SALARY) * 0.68)                   
             , (SELECT COUNT(EMPLOYEE_ID)
                  FROM employee
                HAVING SALARY > ROUND(MAX(employee.SALARY) * 0.68))
          FROM employee
         INNER JOIN department 
            ON employee.DEPARTMENT_ID = department.DEPARTMENT_ID
         GROUP BY 1 
         HAVING (SELECT COUNT(EMPLOYEE_ID) 
                  FROM employee
                HAVING SALARY > ROUND(MAX(employee.SALARY) * 0.68))  > p_total_emp              
        ORDER BY DEPARTMENT_NAME ASC
        ;

示例：

Answer 1

希望你到目前为止度过了愉快的一周。 :)

只是抬头查询，您遇到错误，因为您不能GROUP BY 1.您需要GROUP BY列，而不是聚合。（例如，department.DEPARTMENT_NAME）如下： -

@Component
public class PayloadDeserializer {
    private final MyMapper mapper;

    @Autowired
    public PayloadDeserializer(MyMapper mapper) {
        this.mapper = mapper;
    }
}

@Configuration
public class TopLevelConfig {
    @Bean
    public MyMapper myMapper(PayloadDeserializer payloadDeserializer) {
        MyMapper mapper = new MyMapper();
        mapper.registerModule(metadataModule(payloadDeserializer));
        return mapper;
    }

    @Bean
    public MetadataModule metadataModule(PayloadDeserializer payloadDeserializer) {
        return new MetadataModule(payloadDeserializer);
    }
}

public class MetadataModule {
    private final PayloadDeserializer payloadDeserializer;
    public MetadataModule(PayloadDeserializer payloadDeserializer) {
        this.payloadDeserializer = payloadDeserializer;
    }

    @Override
    public void setupModule(final SetupContext setupContext) {
        final SimpleDeserializers deserializers = new SimpleDeserializers();

        deserializers.addDeserializer(Payload.class, payloadDeserializer);
        setupContext.addDeserializers(deserializers);
    }
}

ORACLE：不是GROUP BY表达式

1 个答案: