轉換SQL來訪問

Question

這裏是一個普通的SQL語句：

SELECT SUM(CASE WHEN [Column2] = 'Cylinder' THEN 1 ELSE 0 END) as 'Cylinder count', 
SUM(CASE WHEN [Column2] = 'Snap' THEN 1 ELSE 0 END) as 'Snap count', 
SUM(CASE WHEN [Column2] = 'Tip' THEN 1 ELSE 0 END) as 'Tip count', 
SUM(CASE WHEN [Column2] = 'Other' THEN 1 ELSE 0 END) as 'Other count' 
FROM [TableName] 
WHERE [Column1] = '1.9 QNS-Quantity Not Sufficient' 

可以請你將它轉換爲MS-訪問？

基於這樣一個問題：

https://stackoverflow.com/questions/3153829/question-on-complex-select-statement

Answer 1

Microsoft Access不支持CASE，但你可以使用IIF代替：

SELECT 
    SUM(IIF([Column2] = 'Cylinder', 1, 0)) as 'Cylinder count', 
    SUM(IIF([Column2] = 'Snap', 1, 0)) as 'Snap count', 
    SUM(IIF([Column2] = 'Tip', 1, 0)) as 'Tip count', 
    SUM(IIF([Column2] = 'Other', 1, 0)) as 'Other count' 
FROM [TableName] 
WHERE [Column1] = '1.9 QNS-Quantity Not Sufficient' 

參考

• http://office.microsoft.com/en-us/access-help/iif-function-HA001228853.aspx
• Case expressions in Access