I'm sure this has be covered many times so please pardon my repeat. I have a query that works but currently has 6 CASE statements within one select. Someone mentioned that it would be best optimized by putting all my WHEN conditions within a single CASE. However, I'm unable to achieve this
select right(RTRIM(region),5) as cell_id,
sum(CASE WHEN LEFT(cparty,3) in ('999','998','997') THEN chargeduration/60 else 0 END) AS OnNet_Minutes,
sum(CASE WHEN LEFT(cparty,3) in ('996','995') THEN chargeduration/60 else 0 END) AS OffNet_C_Minutes,
sum(CASE WHEN LEFT(cparty,3) in ('994','993','992') THEN chargeduration/60 else 0 END) AS OffNet_A_Minutes,
sum(CASE WHEN LEFT(cparty,3) in ('991','990') THEN chargeduration/60 else 0 END) AS OffNet_S_Minutes,
sum(CASE WHEN LEFT(cparty,2) = '00' THEN chargeduration/60 else 0 END) AS OffNet_T_Minutes,
sum(CASE WHEN len(cparty) < 6 and LEFT(cparty,1) <> 0 THEN chargeduration/60 else 0 END) AS SC_Minutes
from August.dbo.cdr20130818
where CHARGEDURATION > 0 and ISNULL(region,'''')<>'''' and LEN(region) > 5
group by right(RTRIM(region),5)
order by right(RTRIM(region),5) asc
In your case, you can't put them all into one CASE, since the results all go into different columns of the select.
BTW, you should remove your ISNULL(region, '''') <> '''' condition, as it's redundant when paired with the LEN(region) > 5 condition. (When region is null, then LEN(region) is also null, and NULL > 5 is false.)
I think you have it right, six different SUM()'s that each have meaning on their own.
If all of your criteria were in the same CASE statement you'd lose detail, you'd be returning the SUM() of your currently separate statements combined into one.
Combining redundant criteria in the WHERE clause can clean up a CASE statement, but you don't have anything completely redundant here.
Related
I have a query which is pulling back data correctly, but about a quarter of the lines of data are unnecessary because they have 0 in the primary data field. Here is the line I wrote to create that primary data field. How can I exclude any case where the output value for amort_FY2020 is 0?
sum(case when f.sales_revenue_period_calendar_sid in ('20200101',
'20200201',
'20200301',
'20200401',
'20200501',
'20200601',
'20200701',
'20200801',
'20200901',
'20201001',
'20201101',
'20201201')
then f.sales_revenue_before_tax_usd_amount
else 0 end) as amort_FY2020
Depending on your database, you can use:
having amort_FY2020 <> 0
Or may may need to repeat the expression:
sum(case when f.sales_revenue_period_calendar_sid in ('20200101','20200201','20200301','20200401','20200501','20200601','20200701','20200801','20200901','20201001','20201101','20201201')
then f.sales_revenue_before_tax_usd_amount else 0
end) <> 0
1.) I am getting an error for using SUM function in SQL is there a possible way to fix this, I tried searching the internet, but most of the examples are for single column.
SELECT
r.WorkOrderBatch,
wo.ProductCode,
wo.WorkOrderQty,
Convert(DATE,wo.StartDate),
wo.CurrentStatus,
replace this line:
SUM(COUNT(CASE r.IsTestPass WHEN 1 THEN NULL ELSE 1 END)) AS FailedQty
With
SUM(CASE r.IsTestPass WHEN 1 THEN 0 ELSE 1 END) AS FailedQty
rest everything looks good
I am trying to build a hive query that does only the below features or a combination of these features. For example, the features include
name = "summary"
name = "details"
name1 = "vehicle stats"
Basically, the query should exclude all the other features in name and name1.
I am quite new to hive. In sql, i know this can be done using except keyword. Just wondering whether there is some functions that can achieve the same.
Thanks very much !!
If I understand correctly, I approach this using group by and having:
select ?
from t
group by ?
having sum(case when name = 'summary' then 1 else 0 end) > 0 and
sum(case when name = 'details' then 1 else 0 end) > 0 and
sum(case when name1 = 'vehicle_stats' then 1 else 0 end) > 0;
The ? is for the column that you want the summary of.
What I am trying to do is combine (2) CASE statements that each return a SUM and then take the SUM of those results. Here's what I have so far:
COUNT((
CASE (COUNT(table.CODE))
WHEN 0
THEN 0
ELSE SUM(
CASE table.CODE
WHEN '100'
THEN 1
ELSE 0
END)) (
CASE (COUNT(table.CODE))
WHEN 0
THEN 0
ELSE (SUM(
CASE table.CODE
WHEN '50'
THEN 1
ELSE 0
END))))
|| AS Total Code
I think I'm over-complicating this. The error I am receiving is Missing Keyword (at the beginning of the 2nd CASE statement). Any thoughts?
When you have an overload of parentheticals, you might find it helpful to go overboard with indention to spot problems:
COUNT
(
(
CASE (COUNT(table.CODE))
WHEN 0
THEN 0
ELSE SUM
(
CASE table.CODE
WHEN '100'
THEN 1
ELSE 0
END
)
<--Should be an END here?-->
) <--What is happening here-->
(
CASE (COUNT(table.CODE))
WHEN 0
THEN 0
ELSE
(
SUM
(
CASE table.CODE
WHEN '50'
THEN 1
ELSE 0
END
)
)
<--Should be an END here?-->
)
)
|| AS Total Code
You can see that there are two CASE statements butted up against each other with no operator to make any sense of it.
You might also spot that your first and third CASE are not closed with an END, which is what MySQL is balking about.
Lastly, that double-bar in MySQL is an "OR" operator. But you are not OR'ing anything... Not sure what the plan was here.
Ultimately, though, I think you are going to run into problems Counting a Sum in the same query. You may have to move those SUM(CASE...END) bits into a subquery and then doing the COUNT outside of that.
After looking over the answers to my questions, this is what I came up with:
CASE (COUNT(table.CODE))
WHEN 0
THEN 0
ELSE ((SUM(
CASE table.CODE
WHEN '100'
THEN 1
WHEN '50'
THEN 1
ELSE 0
END))
END) AS Value5
I'm cleaning up old code so I didn't completely understand what I was looking at because its all over the place. This is a lot cleaner and I'm positive that I am getting desired response now.
I have a query that has a select statement that contains the following:
,COUNT(u.[Unit])
,up.[Number_Of_Stops]
I need to only count the units where number of stops <> 0. This has more details in the query so I can't just say WHERE number_of_stops <> 0. It has to be within the select statement.
Thanks
Try:
SUM(CASE WHEN up.[Number_Of_Stops] != 0 THEN 1 ELSE 0 END) AS countWhereNumStopsNotZero
(Edit: original answer said "COUNT" not "SUM")