If you have any other questions or comments, you can add them to that request at any time. M9 1a8 8 0 1 0 0 16A8 8 0 0 0 9 1zm. How to select the first row of each group? 4 – what is the tie-break or do mytable angellist bitcoin not care?
In this example I do not care. This query will create an in-memory table called ORDERED and add an additional column of rn which is a sequence of numbers from 1 to N. The PARTITION BY indicates it should restart at 1 every time the value of Val changes and we want to order rows by the smallest value of Kind. Oracle has some elegant functionality as expressed in mik’s answer that will generally yield better performance than this answer. I thought I’d toss mine out as well. The difference is that it uses the First_Value instead of Row_Number. Since we are only interested in the first value, in my mind it is more straightforward.
If you prefer, here is the CTE equivalent. 1 but I just thought it worth emphasising that your answer and billinkc’s are not logically the same unless id is unique. Jack Douglas – True, I assumed that. That’s only true if the optimizer takes the written query literally. Not the answer you’re looking for?
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