Question

下面是表1

select  
    nContractPk 
from 
    CustomerPayment 
where 
    nContractPk in (select id            
                    from Contract 
                    where id in (SELECT nContractPk
                                 FROM CustomerPayment
                                 GROUP BY nContractPk
                                 HAVING COUNT(CASE WHEN bPaid <> 1 THEN 1 END) = 0 
                                    AND COUNT(CASE WHEN bPaid = 1 THEN 1 END) > 1) 
                                    AND nStatus = 10)

这是第二张表：

select  
    nContractPk 
from
    EmployeePayment  
where 
    nContractPk in (select id    
                    from Contract 
                    where id in (SELECT nContractPk
                                 FROM EmployeePayment
                                 GROUP BY nContractPk
                                 HAVING COUNT(CASE WHEN bPaid <> 1 THEN 1 END) = 0 
                                    AND COUNT(CASE WHEN bPaid = 1 THEN 1 END) > 1) 
                                    AND nStatus = 10)

我想在customerpayment中仅检索id退出，但不在employeeepayment中检索

请帮忙解决这个问题。

提前致谢

Answer 1

尝试在两个表之间进行LEFT连接，并从另一个表中过滤掉null，如下所示：

SELECT c.nContractPk
FROM CustomerPayment c LEFT JOIN EmployeePayment e
ON c.nContractPk = e.nContractPk
WHERE e.nContractPk IS NULL

我想只检索一个表中的ID号，而不是另一个表中的ID号

1 个答案: