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次のクエリを試していますが、

DECLARE @EntityType varchar(25)
SET @EntityType = 'Accessory';

WITH Entities (
        E_ID, E_Type,
        P_ID, P_Name, P_DataType, P_Required, P_OnlyOne,
        PV_ID, PV_Value, PV_EntityID, PV_ValueEntityID,
        PV_UnitValueID, PV_UnitID, PV_UnitName, PV_UnitDesc, PV_MeasureID, PV_MeasureName, PV_UnitValue,
        PV_SelectionID, PV_DropDownID, PV_DropDownName, PV_DropDownOptionID, PV_DropDownOptionName, PV_DropDownOptionDesc,
        RecursiveLevel
    )
AS
(
    -- Original Query
    SELECT dbo.Entity.ID AS E_ID, dbo.EntityType.Name AS E_Type,
    dbo.Property.ID AS P_ID, dbo.Property.Name AS P_Name, DataType.Name AS P_DataType, Required AS P_Required, OnlyOne AS P_OnlyOne,
    dbo.PropertyValue.ID AS PV_ID, dbo.PropertyValue.Value AS PV_Value, dbo.PropertyValue.EntityID AS PV_EntityID, dbo.PropertyValue.ValueEntityID AS PV_ValueEntityID,
    dbo.UnitValue.ID AS PV_UnitValueID, dbo.UnitOfMeasure.ID AS PV_UnitID, dbo.UnitOfMeasure.Name AS PV_UnitName, dbo.UnitOfMeasure.Description AS PV_UnitDesc, dbo.Measure.ID AS PV_MeasureID, dbo.Measure.Name AS PV_MeasureName, dbo.UnitValue.UnitValue AS PV_UnitValue,
    dbo.DropDownSelection.ID AS PV_SelectionID, dbo.DropDown.ID AS PV_DropDownID, dbo.DropDown.Name AS PV_DropDownName, dbo.DropDownOption.ID AS PV_DropDownOptionID, dbo.DropDownOption.Name AS PV_DropDownOptionName, dbo.DropDownOption.Description AS PV_DropDownOptionDesc,
    0 AS RecursiveLevel
    FROM dbo.Entity
    INNER JOIN dbo.EntityType ON dbo.EntityType.ID = dbo.Entity.TypeID
    INNER JOIN dbo.Property ON dbo.Property.EntityTypeID = dbo.Entity.TypeID
    INNER JOIN dbo.PropertyValue ON dbo.Property.ID = dbo.PropertyValue.PropertyID AND dbo.PropertyValue.EntityID = dbo.Entity.ID
    INNER JOIN dbo.DataType ON dbo.DataType.ID = dbo.Property.DataTypeID
    LEFT JOIN dbo.UnitValue ON dbo.UnitValue.ID = dbo.PropertyValue.UnitValueID
    LEFT JOIN dbo.UnitOfMeasure ON dbo.UnitOfMeasure.ID = dbo.UnitValue.UnitOfMeasureID
    LEFT JOIN dbo.Measure ON dbo.Measure.ID = dbo.UnitOfMeasure.MeasureID
    LEFT JOIN dbo.DropDownSelection ON dbo.DropDownSelection.ID = dbo.PropertyValue.DropDownSelectedID
    LEFT JOIN dbo.DropDownOption ON dbo.DropDownOption.ID = dbo.DropDownSelection.SelectedOptionID
    LEFT JOIN dbo.DropDown ON dbo.DropDown.ID = dbo.DropDownSelection.DropDownID
    WHERE dbo.EntityType.Name = @EntityType
    UNION ALL
    -- Recursive Query?
    SELECT E2.E_ID AS E_ID, dbo.EntityType.Name AS E_Type,
    dbo.Property.ID AS P_ID, dbo.Property.Name AS P_Name, DataType.Name AS P_DataType, Required AS P_Required, OnlyOne AS P_OnlyOne,
    dbo.PropertyValue.ID AS PV_ID, dbo.PropertyValue.Value AS PV_Value, dbo.PropertyValue.EntityID AS PV_EntityID, dbo.PropertyValue.ValueEntityID AS PV_ValueEntityID,
    dbo.UnitValue.ID AS PV_UnitValueID, dbo.UnitOfMeasure.ID AS PV_UnitID, dbo.UnitOfMeasure.Name AS PV_UnitName, dbo.UnitOfMeasure.Description AS PV_UnitDesc, dbo.Measure.ID AS PV_MeasureID, dbo.Measure.Name AS PV_MeasureName, dbo.UnitValue.UnitValue AS PV_UnitValue,
    dbo.DropDownSelection.ID AS PV_SelectionID, dbo.DropDown.ID AS PV_DropDownID, dbo.DropDown.Name AS PV_DropDownName, dbo.DropDownOption.ID AS PV_DropDownOptionID, dbo.DropDownOption.Name AS PV_DropDownOptionName, dbo.DropDownOption.Description AS PV_DropDownOptionDesc,
    (RecursiveLevel + 1)
    FROM Entities AS E2
    INNER JOIN dbo.Entity ON dbo.Entity.ID = E2.PV_ValueEntityID
    INNER JOIN dbo.EntityType ON dbo.EntityType.ID = dbo.Entity.TypeID
    INNER JOIN dbo.Property ON dbo.Property.EntityTypeID = dbo.Entity.TypeID
    INNER JOIN dbo.PropertyValue ON dbo.Property.ID = dbo.PropertyValue.PropertyID AND dbo.PropertyValue.EntityID = E2.E_ID
    INNER JOIN dbo.DataType ON dbo.DataType.ID = dbo.Property.DataTypeID
    INNER JOIN dbo.UnitValue ON dbo.UnitValue.ID = dbo.PropertyValue.UnitValueID
    INNER JOIN dbo.UnitOfMeasure ON dbo.UnitOfMeasure.ID = dbo.UnitValue.UnitOfMeasureID
    INNER JOIN dbo.Measure ON dbo.Measure.ID = dbo.UnitOfMeasure.MeasureID
    INNER JOIN dbo.DropDownSelection ON dbo.DropDownSelection.ID = dbo.PropertyValue.DropDownSelectedID
    INNER JOIN dbo.DropDownOption ON dbo.DropDownOption.ID = dbo.DropDownSelection.SelectedOptionID
    INNER JOIN dbo.DropDown ON dbo.DropDown.ID = dbo.DropDownSelection.DropDownID

)
SELECT E_ID, E_Type,
    P_ID, P_Name, P_DataType, P_Required, P_OnlyOne,
    PV_ID, PV_Value, PV_EntityID, PV_ValueEntityID,
    PV_UnitValueID, PV_UnitID, PV_UnitName, PV_UnitDesc, PV_MeasureID, PV_MeasureName, PV_UnitValue,
    PV_SelectionID, PV_DropDownID, PV_DropDownName, PV_DropDownOptionID, PV_DropDownOptionName, PV_DropDownOptionDesc,
    RecursiveLevel
FROM Entities
INNER JOIN [dbo].[Entity] AS dE
    ON dE.ID = PV_EntityID

問題は 2 番目のクエリです。最初のクエリのように LEFT JOIN を実行できないため、「再帰的なもの」が期待どおりのデータを取得しています。（少なくとも私の理解では）。

LEFT (Outer) JOIN を必要とするデータのフェッチを削除すると、再帰は完全に機能します。私の問題は、両方が必要なことです。これを達成する方法はありますか？

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