在新列上使用条件对列值求和

Question

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，我如何编写一个返回我传递的单词的项目总和的查询？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。

Answer 1

考虑一下：

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;

Answer 2

您只需使用CHARINDEX：

即可

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