我有一个要添加计算字段的查询。我需要添加 2013 年的预计销售额。计算将是当前月数除以年度总销售额乘以 12。我有一个尚未在查询中的 FiscalMonthNum 字段。有人可以告诉我如何添加我需要的字段吗?
SELECT
a.Vendor,
vn.ACNAME AS Vendor_Name,
a.FiscalYear,
a.QtySold,
a.ExtCost
FROM
dbo.S2K_VEND vn
INNER JOIN
(SELECT
sd.IFPRVN AS Vendor,
fc.FiscalYear,
SUM(sd.SBQSHP) AS QtySold,
SUM(sd.SBEPRC) AS ExtCost
FROM
dbo.SalesData sd
LEFT OUTER JOIN dbo.FiscalCalendar fc ON fc.FiscalDate = sd.SBINDT
WHERE
sd.SBTYPE = 'O'
AND
sd.SBINDT > '2011-12-31'
AND
sd.SBCLS NOT IN ('1500')
GROUP BY
sd.IFPRVN,
fc.FiscalYear
)a
ON vn.ACVEND = a.Vendor
GROUP BY
a.Vendor,
vn.ACNAME,
a.FiscalYear,
a.QtySold,
a.ExtCost