I have to create a row_number column ordered by a grouped sum, when using sql:
select Sales.Name, SUM(Sales.Bill) as billsum, ROW_NUMBER() over (order by billsum DESC) as rn
from Sales group by Sales.Name
It reports error because row_number over cannot parse the "billsum" alias, I have to write:
select Sales.Name, SUM(Sales.Bill) as billsum, ROW_NUMBER() over (order by SUM(Sales.Bill) DESC) as rn
from Sales group by Sales.Name
so here I write SUM(Sales.Bill) twice, is there anyway to use the alias here?
The MSDN docs for the T-SQL OVER clause say:
value_expression cannot refer to expressions or aliases in the select list.
As already stated out by other member you either have to use CTE or SubQuery.
Not only Row_Number() function but in tsql you can not reference alias in same query, so either you have to use one of the mentioned way above or the expression you used in your post. I hope it makes sense!! :)
Possible work-arounds are to use CTE or a subquery:
SELECT Name, billsum, ROW_NUMBER() OVER (ORDER BY billsum DESC) AS rn
FROM
( SELECT Sales.Name, SUM(Sales.Bill) AS billsum
FROM Sales
GROUP BY Sales.Name
) tmp
-- Reorder after cutting out qty = 0.
SELECT *,ROW_NUMBER() OVER (partition by claimno ORDER BY itemno) as 'alias name'
from dbo.OrderCol
where QTY <> 0
Related
Priority is the output column.
The group contains duplicate content.
how can I fix this using SQL query?.
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One way to achieve the desired result with this data is to use Dense_rank() function like below:
select *, dense_rank() over (order by [Group]) as Priority
from tab
order by No
For any value, please try the following
;with cte as
(
select [Group], ROW_NUMBER() over (order by No_min) as rn
from
(
select [Group], min([No]) No_min
from tab
group by [Group]
)t
)
select t.*, x.rn as [Priority]
from cte x
join tab t on t.[Group] = x.[Group]
order by 1
Please find the db<>fiddle here.
I would like to sum the Value and group the adjacent row in SQL as shown below. May I know how to do that?
My code now:
Select ID, Value from Table_1
Further question
how about this?
This is a typical gaps and island problem.
As a starter: keep in mind that SQL tables represents unordered set of rows. So for your question to be solved, you need a column that defines the ordering of rows across the table - I assumed ordering_id.
Here is an approach that uses the difference between row_numbers() to build the groups of adjacent rows having the same id:
select
id,
sum(value) value
from (
select
t.*,
row_number() over(order by ordering_id) rn1
row_number() over(partition by id order by ordering_id) rn2
from mytable t
) t
group by id, rn1 - rn2
If you want this on a per user basis:
select
user,
id,
sum(value) value
from (
select
t.*,
row_number() over(partition by user order by ordering_id) rn1
row_number() over(partition by user, id order by ordering_id) rn2
from mytable t
) t
group by user, id, rn1 - rn2
I am trying to create a new table from a percentiles query so I can export it into ARCGIS. I am getting a syntax error, however, that I do not know how to address.
create table tempercent as (select *, percentile_CONT(.95)
WITHIN GROUP (ORDER BY cast(travel_time_minutes as float)) OVER (PARTITION BY TMC_code) AS TTAV_P_80 FROM [dbo].[Andy_I40])
SQL Server does not support CTAs. You could use SELECT ... INTO instead:
SELECT *, PERCENTILE_CONT(.95)
WITHIN GROUP (ORDER BY cast(travel_time_minutes as float))
OVER (PARTITION BY TMC_code) AS TTAV_P_80
INTO tempercent
FROM [dbo].[Andy_I40]
I want to use ROW_NUMBER() function and get first and latest values.
I write bellow query. But I got an error.
The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP, OFFSET or FOR XML is also specified.
help me to solve the issue. Below the sql query
SELECT *
FROM(
SELECT OPP_ID,PRJ_ID,
ROW_NUMBER() OVER (PARTITION BY OPP_ID ORDER BY MAX(CREATION_DATE) DESC) AS RN
FROM OPPOR
GROUP BY OPP_ID,PRJ_ID
ORDER BY MAX(CREATION_DATE) DESC) OP
WHERE OP.RN = 1
The row_number function can do it's own aggregation and ordering, so no need to use group by or order by in your subquery (order by won't work in subqueries as you've seen). It is a little unclear if you want to partition by opp_id or opp_id and prj_id though. But this should be what you're looking for:
SELECT *
FROM(
SELECT OPP_ID,PRJ_ID,
ROW_NUMBER() OVER (PARTITION BY OPP_ID ORDER BY CREATION_DATE DESC) AS RN
FROM OPPOR
) OP
WHERE OP.RN = 1
Consider following tables:
How to skip and take groups from the table? Tried using Row_Number() but it doesn't help. Any ideas?
Used query
;WITH cte AS (SELECT Room.Id, Room.RoomName,
ROW_NUMBER() OVER
(ORDER BY Room.Id) AS RN
FROM Room INNER JOIN
RoomDetails ON Room.Id = RoomDetails.RoomId)
SELECT Id, RoomName
FROM cte
WHERE RN = 1
You need to use partition as part of the dense_rank function
dense_rank() over (partition by roomid) as row
see here for some more examples Windowing functions