Question

我正在尝试获取一个SQL查询，以便为每个属性返回一个没有分配给它们的特定标记值的行，或者如果它们确实具有该标记值，那么它是空的。

下面的查询返回我所追求的内容，除非它返回多行，因为分配给它们的标记不同。我试过让一个小组去工作以返回单行，但无济于事。

SELECT t_package.Name AS SubPackageName
    , t_object.Name as XTable
    , t_attribute.Name as AttributeName
FROM (
      (t_package AS t_package_1 INNER JOIN (t_package INNER JOIN t_object ON t_package.Package_ID = t_object.Package_ID) ON t_package_1.Package_ID = t_package.Parent_ID)
                                INNER JOIN t_attribute ON t_object.Object_ID = t_attribute.Object_ID)
LEFT JOIN t_attributetag ON t_attribute.ID = t_attributetag.ElementID
WHERE (((t_package_1.Name)='X')
    AND ((t_object.Object_Type)='Class')
    AND ((t_attribute.Type) NOT LIKE 'tns:%') )
    AND (t_attributetag.Property <> 'dm_fieldref'
        OR (t_attributetag.Property = 'dm_fieldref'
            AND t_attributetag.VALUE is null))
ORDER BY SubPackageName, ICPTable, AttributeName;

Answer 1

只需添加不同

即可

SELECT distinct t_package.Name AS SubPackageName, t_object.Name as XTable...

Sparx EA中的SQL查询为标记值返回多行

1 个答案: