Question

我正在使用asp.net编写一个Web表单页面。我有两张不同的桌子。两个表都有相同的列，只有不同的数据。例如：

Table 1: col1,  col2,  col3
         123   $12.54   Tom
          34   $7.00    Jan

Table 2: col1,  col2,  col3
         123   $125.00  Tom
         56    $12.00   Joe

我正在尝试编写一个将两个表组合在一起的sql语句，如果表1中的Col1与表2中的col1相同，我想将第2列的值一起添加。例如：

Col1     col2     col3
123      $137.54    Tom
34       $7.00      Jan
56       $12.00     Joe

以下是sql查询：

表1：

SELECT ABAN8 as Number, SUM(SDAEXP * .01) as SaleAmount, A5POPN as Rep 
FROM KAIPRDDTA.F0101, KAIPRDDTA.F4211, KAIPRDDTA.F0301 
WHERE A5AN8 = ABAN8 
 AND ABAN8 = SDAN8 
 AND SDKCOO = '00001' 
 AND SDDCTO not like '%2' 
 AND A5DAOJ >= '118069' 
 AND A5DAOJ <= '118099' 
 GROUP BY ABALPH, A5POPN, ABAN8, A5UPMT, A5CMC1

表2：

SELECT ABAN8 as Number, SUM(SDAEXP * .01) as SaleAmount, A5POPN as Rep 
FROM KAIPRDDTA.F0101, KAIPRDDTA.F42119, KAIPRDDTA.F0301 
WHERE A5AN8 = ABAN8 
 AND ABAN8 = SDAN8 
 AND SDKCOO = '00001' 
 AND SDDCTO not like '%2' 
 AND A5DAOJ >= '118069' 
 AND A5DAOJ <= '118099' 
 GROUP BY ABALPH, A5POPN, ABAN8, A5UPMT, A5CMC1

我知道加入语法已过时，但这就是该公司如何使用它。如果您需要更多信息，请提前告知我们，并提前感谢您的回复！

Answer 1

嗯，合并和完全外连接基本上相当容易，但我不知道db2是否支持隐式全外连接。

我要解决您发布的示例数据，而不是查询，因为我希望能够阅读我写的内容，因为我觉得它会有很多对于那些想要阅读本文的人来说更清楚 - 所以这里有：

SELECT COALESCE(t1.col1, t2.col1) As col1, 
       COALESCE(t1.col2, 0) +  COALESCE(t2.col2, 0) As col2, 
       COALESCE(t1.col3, t2.col3) As col3
FROM table1 as t1
FULL JOIN table12 as t2 ON t1.col1 = t2.col1

据我了解，DB2 supports implicit left joins and implicit right joins。我无法找到关于完全加入的任何内容，但我认为它应该像这样工作：

FROM table1 as t1, table2 as t2
WHERE t1.col1(+) = t2.col1(+)

Answer 2

＆＃34;分组中的5列＆＃34;只选择了2列。对于给定的数字和代表，您可能会获得多条记录。检查＆＃34; UNION ALL＆＃34;符合您的要求。

Select number, sum(SaleAmount) , Rep
from
( SELECT ABAN8 as Number, (SDAEXP * .01) as SaleAmount, A5POPN as Rep 
FROM KAIPRDDTA.F0101, KAIPRDDTA.F4211, KAIPRDDTA.F0301 
WHERE A5AN8 = ABAN8 
 AND ABAN8 = SDAN8 
 AND SDKCOO = '00001' 
 AND SDDCTO not like '%2' 
 AND A5DAOJ >= '118069' 
 AND A5DAOJ <= '118099' 
union all
SELECT ABAN8 as Number,  (SDAEXP * .01) as SaleAmount, A5POPN as Rep 
FROM KAIPRDDTA.F0101, KAIPRDDTA.F42119, KAIPRDDTA.F0301 
WHERE A5AN8 = ABAN8 
 AND ABAN8 = SDAN8 
 AND SDKCOO = '00001' 
 AND SDDCTO not like '%2' 
 AND A5DAOJ >= '118069' 
 AND A5DAOJ <= '118099' 
) a 
group by number , rep

SQL加入两个查询并总结记录

2 个答案: