MS-Access循环引用错误

Question

我正在获得由qrySectorAX＆＃39;引起的循环引用。从以下代码：

SELECT qryIntervalSectorAX.SectorID, qryIntervalSectorAX.UnitID, Count(qryIntervalSectorAX.[Length]) AS NoOfWeights, (Sum([Length]*([AX]-[WeightedAX])^2)/(([NoOfWeights]-1)/[NoOfWeights]*Sum([Length])))^0.5 AS WeightedSD
FROM qryIntervalSectorAX INNER JOIN qrySectorAX ON qryIntervalSectorAX.UnitID = qrySectorAX.UnitID AND qryIntervalSectorAX.SectorID = qrySectorAX.SectorID
GROUP BY qryIntervalSectorAX.SectorID, qryIntervalSectorAX.UnitID;

有人可以帮忙吗？