Question

我之前询问过如何通过MYSQL加入多个表，但现在我遇到了一个新问题。

说我有这几张桌子。

报销表

-Name---Check Number-----Date------Reimbursement--
-John-----1--------------7/23/12-------$100-------
-Joe------2--------------7/23/12-------$102-------
-Jane-----3--------------7/23/12-------$103-------
-Jill-----4--------------7/23/12-------$104-------

原始索赔

-Name---Check Number-----Date---------Amount--
-John-----1--------------7/23/12-------$100---
-Joe------2--------------7/23/12-------$102---
-Jane-----3--------------7/23/12-------$103---
-Jill-----4--------------7/23/12-------$100---

调整后的索赔

-Name---Check Number-----Date---------Amount--
-Jill-----4--------------7/23/12-------$4-----

通过水晶报告的最终结果应

-Name---Check #---Claim Type----Date Paid----Amount----Reimbursement--
-John-----1-------Original--------7/23/12-----$100-------$100---------
-Joe------2-------Original--------7/23/12-----$102-------$102---------
-Jane-----3-------Original--------7/23/12-----$103-------$103---------
-Jill-----4-------Original-------7/23/12------$100-------$104---------
-Jill-----4-------Adjusted-------7/23/12------$4----------------------

不是

-Name---Check #---Claim Type----Date Paid----Amount----Reimbursement--
-John-----1-------Original--------7/23/12-----$100-------$100---------
-Joe------2-------Original--------7/23/12-----$102-------$102---------
-Jane-----3-------Original--------7/23/12-----$103-------$103---------
-Jill-----4-------Original-------7/23/12------$100-------$104---------
-Jill-----4-------Adjusted-------7/23/12------$4---------$104---------

我目前的剧本是：

Select  mt.`Check Number` as `Check Number`,
        mt.`Payment Date` as `Payment Date`,
        mt.`Payment Type` as `Payment Type`,
        c1.`Facility Name` as `Facility Name`,
        'Adjustment June 2012' as `Claim Type`,
        c1.`Amount` as Amount,
        mt.Reimbursement as Reimbursement 
  From  Reimbursement mt 
               Inner Join ClaimAdjust_6_2012 c1 
                  on c1.`Check Number`  = mt.`Check Number` and 
                     mt.`Payment Date` = c1.`Payment Date` 
  Where mt.`Payment Date`>='2012-7-1' And 
        mt.`Payment Date`<'2012-8-1' 

Union 

Select  mt.`Check Number` as `Check Number`,
        mt.`Payment Date` as `Payment Date`,
        mt.`Payment Type` as `Payment Type`,
        c1.`Facility Name` as `Facility Name`,
        'Original June 2012' as `Claim Type`,
        c1.`Amount` as Amount,
        mt.Reimbursement as Reimbursement 
 From   Reimbursement mt 
              Inner Join Claim_6_2012 c1 
                    on c1.`Check Number`  = mt.`Check Number` and 
                        mt.`Payment Date` = c1.`Payment Date` 
Where   mt.`Payment Date`>='2012-7-1' And 
        mt.`Payment Date`<'2012-8-1'

Answer 1

此查询有效吗？为什么不加入Reimbursement Table和Original Claim以及联合Adjusted Claim

SELECT      a.Name, a.CheckNumber, a.`Date`,
            b.Amount, a.Reimbursement
FROM        Reimbursement a INNER JOIN
                OrginalClaim b ON
                    a.Name = b.Name AND
                    a.CheckNmber = b.CheckNumber AND
                    a.`Date` = b.`Date`
UNION
SELECT      Name, CheckNumber, `Date`, Amount, NULL as Reimbursement
FROM        AdjustedClaim

Answer 2

我认为答案非常简单。只需忽略第一个子查询中的报销：

Select mt.`Check Number` as `Check Number`,mt.`Payment Date` as `Payment Date`,mt.`Payment Type` as `Payment Type`,c1.`Facility Name` as `Facility Name`,'Adjustment June 2012' as `Claim Type`,c1.`Amount` as Amount, NULL as Reimbursement
From Reimbursement mt  Inner Join
     ClaimAdjust_6_2012 c1
    on c1.`Check Number` = mt.`Check Number` and mt.`Payment Date` = c1.`Payment Date`
Where mt.`Payment Date`>='2012-7-1' And mt.`Payment Date`<'2012-8-1' 
Union all
Select mt.`Check Number` as `Check Number`,mt.`Payment Date` as `Payment Date`,mt.`Payment Type` as `Payment Type`,c1.`Facility Name` as `Facility Name`,'Original June 2012' as `Claim Type`,c1.`Amount` as Amount,mt.Reimbursement as Reimbursement
From Reimbursement mt Inner Join
     Claim_6_2012 c1
     on c1.`Check Number` = mt.`Check Number` and mt.`Payment Date` = c1.`Payment Date`
Where mt.`Payment Date`>='2012-7-1' And mt.`Payment Date`<'2012-8-1'

这会加入表格，因此您仍然可以使用付款日期，但将值设置为NULL。

mysql内连接和联合

2 个答案: