sql - 将 SQL 转换为 ACCESS

Question

这是一个常规的 SQL 语句:

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'

你能把它转换成 ms-access 吗？？

基于这个问题:

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

Answer 1

Microsoft Access 不支持 CASE，但您可以改用 IIF:

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'

引用资料

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