two rows of back with a single column with just one place
Hello all;I have a query that returns two rows similar to this below
ID PLACE PROGRAM
A NEWYORK PROGRAM A
A NEWYORK PROGRAM B
I would like this instead
ID PLACE PROGRAM
A NEWYORK PROGRAM A
PROGRAM B
All help is appreciated. Thank you.user13328581 wrote:
WOW... Thanks a lot for Salomon, I never used the partitions and row_number in such a way... can you please explain your logic.
Ensure that:
ROW_NUMBER() over (partition by order of identification by location, program)
This operation can take all the rows returned by the query andsplit them in compartments (sheet music) by id. Inside each bucket it order lines by program and place and assign line numbers. So for each row of the ID number 1 will be stored with (in alphabetical order) first place the first programt. And this is the line where we want to ID is displayed. That's why we wrap the analytical function that precedes in the CASE statement that will do just that. Now:
ROW_NUMBER() over (partition by id, order by program)
pretty much the same just bucket is a combination ID / PLACE. So for each combination of it, we want to show that for the first (in alphabetical order) programt.
Now notice in the ORDER BY clause I prefix ID and PLACE with the table alias. You do it because otherwise the query alias ID and PLACE will have priority resulting in the incorrect sort order (remember that we cancelled all ID and PLACE with the exception of the number of line 1).
SY.
Tags: Database
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