如何优化多个表中的多个子查询？

Question

我有两个表，如tnx_lc_invoice和tnx_lc_payment。我想从这两个表中生成报告。

表模式如下面的图像

tnx_lc_payment

tnx_lc_invoice

我想生成输出利柯以下图片

输出

我想下面的查询和它产生类似的输出。但我想优化此查询或任何替代解决方案，以获得更快的结果。

SELECT 
    a.lc_no, 
    a.invoiceValue, 
    b.paymentValue, 
    (
     a.invoiceValue - b.paymentValue 
    ) AS shortPaymentValue 
FROM 
    (
     SELECT 
      lc_no, 
      sum(invoice_value) AS invoiceValue 
     FROM 
      tnx_lc_invoice 
     GROUP BY 
      lc_no 
    ) a 
INNER JOIN (
    SELECT 
     lc_no, 
     sum(payment_value) AS paymentValue 
    FROM 
     tnx_lc_payment 
    GROUP BY 
     lc_no 
) b ON a.lc_no = b.lc_no 

如果还有其他替代方案，请让我知道。请提前致谢。

Answer 1

而不是使用子查询创建一个内部指导他们

---

之间

SELECT 
     a.lc_no, 
     sum(a.invoice_value) AS invoiceValue, 
     sum(b.payment_value) AS payment_value, 
     (sum(a.invoice_value) - sum(b.paymentValue)) AS shortPaymentValue 
    FROM  tnx_lc_invoice a 
    INNER JOIN tnx_lc_payment b  
    ON a.lc_no = b.lc_no 
    GROUP BY 
     a.lc_no 

因为它乘以行如果两个发票和付款会在同一lc_no重复的查询是不正确的。

所以有必要在内部查询中添加至少一个组。

SELECT 
     a.lc_no, 
     sum(a.invoice_value) AS invoiceValue, 
     sum(b.payment_value) AS payment_value, 
     sum(a.invoice_value) - sum(b.payment_Value) AS shortPaymentValue 
    FROM (select lc_no, sum(invoice_value) as invoice_value 
      from tnx_lc_invoice group by lc_no) a 
    INNER JOIN tnx_lc_payment b  
    ON a.lc_no = b.lc_no 
    GROUP BY 
     a.lc_no