SQL查询。将两个表相交：显示匹配的记录；但是，另外，如果两个表中都有记录，则显示它们

我有一个查询，但我不知道如何修改它以满足我的需要

SELECT POST_DATE, R1SUM AS Batch, R2SUM AS DailySF, Format( (R2SUM/(R2SUM+R1SUM)), 'Percent') AS Throughput
FROM 
(SELECT (COL1+COL2+COL3+COL4) as R1SUM, DAY
FROM DVDR)  AS r1, 
(SELECT  sum(TOTAL) as R2SUM, POST_DATE
FROM SENTSF
WHERE TMC=444)  AS r2
WHERE DAY=POST_DATE

当表R1在R2中没有匹配的天数时（反之亦然），此查询不显示该条目；但我需要用0值来反映它（对于丢失的记录）

必须在MSAccess中工作

Table1:
DATE  | COL1 | COL2 | COL3 | COL4 | 
1-1-1 |  2   |  1   |   1  |   1  |
1-1-1 |  4   |  5   |   1  |   1  |
1-2-1 |  1   |  2   |   2  |   2  |

Table2 :
DATE  | TOTAL| 
1-1-1 |  2   | 
1-1-1 |  6   | 

我想让它显示最终的表格：

DATE  | DailyBatch | DailySF | Throughput| 
1-1-1 |  16         |  8     |     50%   |
1-2-1 |  7          |  0     |      0%   |

与工会合作：

SELECT POST_DATE, 
       sum(R1SUM) AS Daily_Batch, 
       sum(R2SUM) AS Daily_SFs, 
       Format( (sum(R2SUM)/sum(R2SUM+R1SUM)), 'Percent') AS Throughput
FROM 
(SELECT DAY as POST_DATE, (
        COL1+COL2+COL3+COL4) as R1SUM, 
        0 as R2SUM 
 FROM D_VDR 
 union all
 SELECT POST_DATE, 
        0 as R1SUM, 
        sum(TOTAL) as R2SUM 
 FROM SENT_SF 
 WHERE TMC=444
) AS sq
group by POST_DATE

（本质上，这是在模拟一个完整的外部联接，据我所知，它在Access中不可用。）

使用UNION：

SELECT POST_DATE, 
       sum(R1SUM) AS Daily_Batch, 
       sum(R2SUM) AS Daily_SFs, 
       Format( (sum(R2SUM)/sum(R2SUM+R1SUM)), 'Percent') AS Throughput
FROM 
(SELECT DAY as POST_DATE, (
        COL1+COL2+COL3+COL4) as R1SUM, 
        0 as R2SUM 
 FROM D_VDR 
 union all
 SELECT POST_DATE, 
        0 as R1SUM, 
        sum(TOTAL) as R2SUM 
 FROM SENT_SF 
 WHERE TMC=444
) AS sq
group by POST_DATE

---

（本质上，这是在模拟一个完整的外部连接，据我所知，它在Access中不可用。）

很难说您想要得到什么。您可以发布您的表结构以及一些示例数据（您希望看到什么）吗？很难说您想要得到什么。您能否发布您的表结构以及一些示例数据（您希望看到什么）？