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distinct与order by

不知为啥,当我得查询中出现distinct时,order by 中必须包含要查询的列,否则报错。

SELECT DISTINCT    a.DetailId,    a.OrderId,    a.ProductId,    pi2.BarCode,    pi1.ProductName,    pi1.productCode,    pi1.spec,    a.UnitId,    ui.UnitName,    SNUM(a.DetailId) as Quantity,    a.Discount,    a.UnitPrice,    a.TaxRate,    a.ProductMoney,    a.TaxMoney,    a.PayableMoney,    a.IsGiveAway,    a.DetailId AS ColGuid,    a.ParentGuid,    a.DetailId AS OrderDetailId,    a.OrderId AS RelevanceOrder,    a.Memo,    pi2.SalePrice AS InitUnitPrice,    a.SEQ,      ---必须包含这个,否则报错    a.Quantity - SNUM(a.DetailId) AS OutQuantityFROM    SaleOrderDetail aLEFT JOIN ProductInfo pi1 ON a.ProductId = pi1.ProductIdLEFT JOIN ProductPrice pi2 ON a.ProductId = pi2.ProductIdAND pi2.unitid = a.unitidLEFT JOIN UnitInfo ui ON a.UnitId = ui.UnitIdWHERE    a.DetailId IN (SELECT COLUMN_VALUE FROM TABLE(SPLITSTR(IDS, ,)))ORDER BY    a.SEQ ASC

 

distinct与order by