大约有 45,000 项符合查询结果（耗时：0.0527秒） [XML]
Postgresql aggregate array
...yOfMarks
FROM Student
As described here: http://www.mkyong.com/database/convert-subquery-result-to-array/
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It may be tempting to convert IsSameOrSubclass into an extension method but I recommend against it, it's a bit awkward to read and write, and easy to mess up (reversing the order of potentialBase and potentialDescendant can be deadly).
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