查询表达式中的Ms-access语法错误（缺少运算符）＆＃39;（Quantity * UnitPrice）ExtendedPrice＆＃39;

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 -

  

查询表达式中的语法错误（缺少运算符）＆＃39;（数量*   UnitPrice）ExtendedPrice＆＃39;。

请帮助

Answer 1

使用AS - SQL别名用于为表或列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 ";