I have the following query,
我有以下查询,
SELECT AT.Name AS Name, COALESCE(VAL.Value, VALP.Value) AS Value
FROM Attributes AT
LEFT OUTER JOIN AttributesValues VAL ON VAL.AttributeID = AT.ID
LEFT OUTER JOIN AttributesValues VALP ON VALP.AttributeID = AT.ID
LEFT OUTER JOIN Products p ON p.ID = VAL.ProductID
LEFT OUTER JOIN AttributesGroups G ON G.ID = AT.GroupID
ORDER BY p.ID;
SELECT