我想在哪里“ ReceiptDate =？应该是当前系统日期...。我想写一下如何在SQL中获取当前系统日期。

Question

SELECT        
    SUM(ReceiptDetails.ItemSellPrice * ReceiptDetails.ItemQty) AS TotalSalesForToday
FROM            
    (ReceiptDetails 
INNER JOIN
    Receipt ON ReceiptDetails.ReceiptID = Receipt.ReceiptID)
WHERE
    (Receipt.ReceiptDate =?)

Answer 1

使用DATE()函数。

如果该值确实是日期，则可以进行直接比较：

WHERE Receipt.ReceiptDate = DATE()

如果ReceiptDate也有时间成分，则：

WHERE Receipt.ReceiptDate >= DATE() AND
      Receipt.ReceiptDate < DATEADD("day, 1, DATE())