"SELECT SalesReturnId, ReturnDate, sr.InvoiceNo, (lastname & ', ' & firstname & ', ' & MI) as StaffName, TotalAmount, SUM(sri.Quantity) as TotalQuantity FROM SalesReturn sr INNER JOIN SalesReturnItem sri ON sr.InvoiceNo = sri.InvoiceNo INNER JOIN Staff s ON s.StaffId = sr.userID WHERE ReturnDate BETWEEN '" + startDate.ToString("yyyy-MM-dd") + "' AND '" + endDate.ToString("yyyy-MM-dd") + "' AND sr.InvoiceNo LIKE '%" + txtName.Text + "%' GROUP BY sr.InvoiceNo ORDER BY ReturnDate, sr.InvoiceNo DESC";
When I run that query I keep getting this error:
syntax error (missing operator) in query expression sri.invoiceNo = sri.invoiceNo INNER JOIN Staff s oN s.Staffid = sr.userld