-1
value measurement1 measurement2
-------|-------------|-----------
value1 1 **2**
value2 **3** **3**
value3 **2** 1
然后找前2最高值, 我想要得到以下的输出:采用row_number()
和join
top 2 by measurement1 top 2 by measurement2
---------------------|----------------------
value2 value2
value3 value1