查询表达式 '(Quantity * UnitPrice) ExtendedPrice' 中的 Ms-access 语法错误（缺少运算符）

Question

OleDbConn.ole = "SELECT ProductCode, Description, Quantity, UnitPrice, (Quantity * UnitPrice) ExtendedPrice FROM SalesReturnItem sri INNER JOIN Product p ON p.ProductNo = sri.ProductID WHERE Sri.InvoiceNo = " 
+ invoiceNo + " ORDER BY Description ";

每当我执行此查询时，我都会收到以下错误 -

查询表达式 '(Quantity * UnitPrice) ExtendedPrice'。

请帮忙

Answer 1

使用 AS - SQL 别名用于为表或表中的列提供临时名称。

OleDbConn.ole = "SELECT ProductCode, Description, Quantity, UnitPrice, (Quantity * UnitPrice) AS ExtendedPrice FROM SalesReturnItem sri INNER JOIN Product p ON p.ProductNo = sri.ProductID WHERE Sri.InvoiceNo = " 
+ invoiceNo + " ORDER BY Description ";