I'm trying to get the MODE average for a set of zipcodes (zip code with most entries in a particular upload set). I want to make this a scalar function, instead of a stored procedure.
Why does this work:
Select Top 1 LocationZip
from UploadSetZipCodeCount
where WorkOrderSet = 31
Order by ZipCount desc
But not this:
Select #setbasezip= Top 1 LocationZip
from UploadSetZipCodeCount
where WorkOrderSet = 31
Order by ZipCount desc
My declaration type is correct for the LocationZip field.
Just a syntax issue... select top 1 should come before the variable assignment:
Select Top 1 #setbasezip = LocationZip
from UploadSetZipCodeCount
where WorkOrderSet = 31
Order by ZipCount desc
Related
Is it possible to add condition within the in clause of postgresql
for example
select ... where (t1.subject,t2.weight) in ((1,2),(2,3))
I want to check whether subject is 1 but weight can be >= 2 not just 2 and so on. So that condition would logically look somewhat like
select ... where (t1.subject,t2.weight) in ((1,>2),(2,>3))
No, this is not possible. You need to write
…
WHERE t1.subject = 1 AND t2.weight > 2
OR t1.subject = 2 AND t2.weight > 3;
You can select value of object using subquery. Simple just select query subject which are having weight greater than >=2.
select ... where (t1.subject,t2.weight) in (select subject FROM ... where weight >=2 ,select subject FROM ... where weight >=3 );
I want to reduce the number of queries I'm making to my postgres database.
Currently I have this
select * from token_balances where asset_id = '36f813e4-403a-4246-a405-8efc0cbde76a' AND tick < yesterday ORDER BY tick DESC LIMIT 1;
select * from token_balances where asset_id = '36f813e4-403a-4246-a405-8efc0cbde76a' AND tick < last_week ORDER BY tick DESC LIMIT 1;
Is there some way I can make this into one query. Or is there even any need to reduce it?
Thanks
You can simply use the query with the greater date of tick. The first query already includes the results coming from the second one.
Just use the first query and you are good to go.
select * from token_balances where asset_id = '36f813e4-403a-4246-a405-8efc0cbde76a' AND tick < '2022-05-26T14:13:42.914Z' ORDER BY tick DESC LIMIT 1;
Rather than use yesterday (which is a valid reference) and last_week (which is not valid) just convert to date arithmetic. You can use simple date subtraction:
select *
from token_balances
where asset_id = '36f813e4-403a-4246-a405-8efc0cbde76a'
and tick < current_date - :num_days
order by tick desc
limit 1;
I have a portal on my "Clients" table. The related table contains the results of surveys that are updated over time. For each combination of client and category (a field in the related table), I only want the portal to display the most recently collected row.
Here is a link to a trivial example that illustrates the issue I'm trying to address. I have two tables in this example (Related on ClientID):
Clients
Table 1 Get Summary Method
The Table 1 Get Summary Method table looks like this:
Where:
MaxDate is a summary field = Maximum of Date
MaxDateGroup is a calculated field = GetSummary ( MaxDate ;
ClientIDCategory )
ShowInPortal = If ( Date = MaxDateGroup ; 1 ; 0 )
The table is sorted on ClientIDCategory
Issue 1 that I'm stumped on: .
ShowInPortal should equal 1 in row 3 (PKTable01 = 5), row 4 (PKTable01 = 6), and row 6 (PKTable01 = 4) in the table above. I'm not sure why FM is interpreting 1Red and 1Blue as the same category, or perhaps I'm just misunderstanding what the GetSummary function does.
The Clients table looks like this:
Where:
The portal records are sorted on ClientIDCategory
Issue 2 that I'm stumped on:
I only want rows with a ShowInPortal value equal to 1 should appear in the portal. I tried creating a portal filter with the following formula: Table 1 Get Summary Method::ShowInPortal = 1. However, using that filter removes all row from the portal.
Any help is greatly appreciated.
One solution is to use ExecuteSQL to grab the Max Date. This removes the need for Summary functions and sorts, and works as expected. Propose to return it as number to avoid any issues with date formats.
GetAsTimestamp (
ExecuteSQL (
"SELECT DISTINCT COALESCE(MaxDate,'')
FROM Survey
WHERE ClientIDCategory = ? "
; "" ; "";ClientIDCategory )
)
Also, you need to change the ShowInPortal field to an unstored calc field with:
If ( GetAsNumber(Date) = MaxDateGroupSQL ; 1 ; 0 )
Then filter the portal on this field.
I can send you the sample file if you want.
Ok I have a query where I need to ommit the result if the first value of an array_agg = natural so I thought I can do this:
select
visitor_id,
array_agg(code
order by session_start) codes_array
from mark_conversion_sessions
where conv_visit_num2 < 2
and max_conv = 1
and (array_agg(code
order by session_start))[1] != 'natural'
group by visitor_id
But when I run this I get the error:
ERROR: aggregate functions are not allowed in WHERE
LINE 31: and (array_agg(code
So is there a way I can reference that array_agg in the where clause?
Thank you
The having clause is used to act like a where clause on grouped data. Move the criteria that is using aggregates into the having clause, eg:
select
visitor_id,
array_agg(code order by session_start) codes_array
from mark_conversion_sessions
where
conv_visit_num2 < 2
and max_conv = 1
group by visitor_id
having
(array_agg(code order by session_start))[1] != 'natural'
docs:
https://www.postgresql.org/docs/9.6/static/tutorial-agg.html
id datetime new_column datetime_rankx
1 12.01.2015 18:10:10 12.01.2015 18:10:10 1
2 03.12.2014 14:44:57 03.12.2014 14:44:57 1
2 21.11.2015 11:11:11 03.12.2014 14:44:57 2
3 01.01.2011 12:12:12 01.01.2011 12:12:12 1
3 02.02.2012 13:13:13 01.01.2011 12:12:12 2
3 03.03.2013 14:14:14 01.01.2011 12:12:12 3
I want to make new column, which will have minimum datetime value for each row in group by id.
How could I do it in Power BI desktop using DAX query?
Use this expression:
NewColumn =
CALCULATE(
MIN(
Table[datetime]),
FILTER(Table,Table[id]=EARLIER(Table[id])
)
)
In Power BI using a table with your data it will produce this:
UPDATE: Explanation and EARLIER function usage.
Basically, EARLIER function will give you access to values of different row context.
When you use CALCULATE function it creates a row context of the whole table, theoretically it iterates over every table row. The same happens when you use FILTER function it will iterate on the whole table and evaluate every row against the filter condition.
So far we have two row contexts, the row context created by CALCULATE and the row context created by FILTER. Note FILTER use the EARLIER to get access to the CALCULATE's row context. Having said that, in our case for every row in the outer (CALCULATE's row context) the FILTER returns a set of rows that correspond to the current id in the outer context.
If you have a programming background it could give you some sense. It is similar to a nested loop.
Hope this Python code points the main idea behind this:
outer_context = ['row1','row2','row3','row4']
inner_context = ['row1','row2','row3','row4']
for outer_row in outer_context:
for inner_row in inner_context:
if inner_row == outer_row: #this line is what the FILTER and EARLIER do
#Calculate the min datetime using the filtered rows
...
...
UPDATE 2: Adding a ranking column.
To get the desired rank you can use this expression:
RankColumn =
RANKX(
CALCULATETABLE(Table,ALLEXCEPT(Table,Table[id]))
,Table[datetime]
,Hoja1[datetime]
,1
)
This is the table with the rank column:
Let me know if this helps.