在新列上对具有条件的列值求和答案

【问题标题】：Summing column values with condition on a new column在新列上对具有条件的列值求和
【发布时间】：2017-07-19 06:32:14
【问题描述】：

假设我有下表：

Letter  Item1  Item2
'a'     2      3
'b'     3      5
'c'     6      7

如果单词包含某些字母，我如何编写查询返回我通过的单词的项目总和？例如：

Word  Sum
'ab'  13
'abc' 26
'bc'  21

编辑：我需要在查询中传递几个单词。

【问题讨论】：

你为什么不考虑ca或ac？
@VijaykumarHadalgi 这只是一个例子。

标签： sql ms-access select

【解决方案1】：

你可以简单地使用CHARINDEX:

SELECT SUM(Item1) + SUM(Item2)
FROM TABLE_NAME WHERE CHARINDEX(Letter, ENTER_WORD) > 0

【讨论】：

CharIndex 在 Access 查询中不是一个可识别的函数。

【解决方案2】：

考虑：

SELECT [enter word] AS Word, Sum(IIf(InStr([enter word],[Letter])>0,[Item1]+[Item2],0)) AS LtrSum FROM Table1 GROUP BY [enter word];

或

SELECT DISTINCT [enter word1] AS W1, Sum(IIf(InStr([enter word1],[Letter])>0,[Item1]+[Item2],0)) AS C1, [enter word2] AS W2, Sum(IIf(InStr([enter word2],[Letter])>0,[Item1]+[Item2],0)) AS C2, [enter word3] AS W3, Sum(IIf(InStr([enter word3],[Letter])>0,[Item1]+[Item2],0)) AS C3 FROM Table1 GROUP BY [enter word1], [enter word2], [enter word3];

或

SELECT DISTINCT [enter word1] AS W1, DSum("Item1","Table1","InStr('" & [enter word1] & "', [Letter])>0")+DSum("Item2","Table1","InStr('" & [enter word1] & "', [Letter])>0") AS C1, [enter word2] AS W2, DSum("Item1","Table1","InStr('" & [enter word2] & "', [Letter])>0")+DSum("Item2","Table1","InStr('" & [enter word2] & "', [Letter])>0") AS C2, [enter word3] AS W3, DSum("Item1","Table1","InStr('" & [enter word3] & "', [Letter])>0")+DSum("Item2","Table1","InStr('" & [enter word3] & "', [Letter])>0") AS C3 FROM Table1;

或

SELECT Table2.Word, Sum(IIf(InStr([Word],[Letter])>0,[Item1]+[Item2],0)) AS LtrSum FROM Table2, Table1 GROUP BY Table2.Word;

【讨论】：

谢谢。但是如果我需要在查询中传递 5 个单词并且它们没有存储在另一个表中怎么办？
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