I want my SQL to display the overdue count when the condition is the status name showed closed on the exact due date then the count will be set as 1. For example, on the due date, the status name only became closed.
select
category, COUNT(overdue) as overdue2
from
(select
Category, due,
case when DATEDIFF(day, Due, SYSDATETIME()) = 0 then 1
else 0
end as overdue
from
FeedbackDetail
where
StatusName = 'Closed' and
FeedbackDatetime >= '2018-01-01') a
Group by
Category
My expected result is to display the count where the statusname is closed on the exact due date time.
Any idea on this?
The COUNT aggregate function counts existant (non-null) values, so it will count 0 as well as 1. Since you did not post the whole query and we have no idea what a1 is, the only solution that can be proposed is:
Use SUM instead of COUNT.
You can modify the query like given below for better performance and working.
DECLARE #currentDateTime DATETIME = GETDATE()
select
category, SUM(overdue) as overdue2
from
(select
Category,
case when DATEDIFF(day, Due, #currentDateTime) = 0 then 1
else 0
end as overdue
from
FeedbackDetail
where
StatusName = 'Closed' and
FeedbackDatetime >= '2018-01-01') a
Group by
Category
Related
Edited: to include sample data
Looking for guidance on a TSQL query.
I have a table that stores readings from a sensor (Amperage). The table basically has a Date/Time and a Value column.
The date/time increments every 5 seconds (a new record is added on 5 second intervals).
I am trying to build a query to determine the duration of time that the value was >X.
Example Data:
http://sqlfiddle.com/#!18/f15c0/1/0
The example data is missing chunks to make it smaller but think you would get the idea.
I am trying to get the first record to the next record that goes above 7. This I would do a datediff to get the duration in seconds from when the data started to that first record over 7. I then need to repeat this but now find when it goes below 7.
This way I can see the cycle time duration.
Think of it as your Fridge. The sensor checks in every 5 seconds and sees that the fridge is off and records that. Eventually the fridge turns on and remains on for a period of time. I am trying to get all those cycle times.
I am trying to use Lead and Lag functions...but just getting lost in regards to pulling the data.
Any help?
declare #val numeric(10,5) = 7.0
select v1.entrydate,
v1.Amps,
case when v1.fl = 1 and v1.lg is null then 1
when v1.lg != v1.fl then 1
else 0
end as fl_new
from (
select v1.entrydate,
v1.Amps,
case when v1.Amps > #val then 1
else 0
end as fl,
lag(case when v1.Amps > #val then 1
else 0
end) over(order by v1.entrydate) as lg
from (
select t.entrydate as entrydate,
t.Amps as Amps
from YourTable t
) v1
) v1
where case when v1.fl = 1 and v1.lg is null then 1
when v1.lg != v1.fl then 1
else 0
end = 1
order by v1.entrydate
And don't forget set YourTable name and #val (which is "X").
Images are blocked at my current location, so I can't see your structure. I'll assume you have the following table (I'll ignore PK and other constraints):
create table reading(
entryDate datetime,
amps int
)
Assuming anything above 3 amps is ON, and you want to compute the duty cycles in seconds, then
declare #threshold int = 3;
with
state as (
select entryDate,
case when amps>#threshold then 'ON' else 'OFF' end state,
lag( case when amps>#threshold then 'ON' else 'OFF' end )
over(order by entryDate) prev_state
from reading
),
transition as (
select entryDate, state
from state
where state <> coalesce(prev_state,'')
)
select entryDate,
state,
dateDiff(
s,
entryDate,
lead(entryDate) over(order by entryDate)
) duration
from transition
order by 1
Not sure how fast it'll be, but if you want to try with LAG?
Here's an example that checks for a difference of X>=2
SELECT entrydate, amps
FROM
(
SELECT
entrydate, amps,
amps - LAG(amps) OVER (ORDER BY entrydate) AS PrevAmpsDiff
FROM YourTable
) q
WHERE ABS(FLOOR(PrevAmpsDiff)) >= 2
ORDER BY entrydate;
A test on rextester here
i'm trying to build a query in which I need to apply 2 different where clauses, depending on the value of Current Month. In this case, I need to show data from the last 2 years, only of the months before the current month:
Example 1:
Current Date is: 01-01-2017
Need to show data from:
01/2015; 02/2015; 03/2015; 04/2015; 05/2015; 06/2015;
07/2015; 08/2015; 09/2015; 10/2015; 11/2015; 12/2015;
01/2016; 02/2016; 03/2016; 04/2016; 05/2016; 06/2016;
07/2016; 08/2016; 09/2016; 10/2016; 11/2016; 12/2016.
Example 2:
Current Date is: 01-03-2017
Need to show data from: 01/2016; 02/2016; 01/2017; 02/2017.
So I built the following query:
SELECT *
FROM TABLE1
WHERE
CASE MONTH(GETDATE())
WHEN 1
THEN YEAR(Data)>=YEAR(GETDATE())-2 and YEAR(data)<YEAR(GETDATE())
ELSE YEAR(Data)>=YEAR(GETDATE())-1 and YEAR(data)<=YEAR(data) and MONTH(data)<MONTH(GETDATE())
END
I'm getting an error.
Can you please help me?
Thank you.
Your syntax is incorrect for sure. THEN is not a logical expression - it is supposed to return value. So you can't write logical expression in THEN/ELSE blocks as you have attempted to. Instead you might try something like:
WHERE
#date >= CASE WHEN a=b THEN '20150101' ELSE '20160202' END
Another thing is: conversions and functions in predicate are very bad for performance. When working with dates you might want to prepare filter predicate before the query when possible, e.g.:
declare
#date_begin date,
#date_end date
set #date_end = DATEADD(..., #arg_date)
set #date_begin = DATEADD(YEAR, -2, #date_end)
select ...
where date between #date_begin and #date_end
in your case it could be something like:
declare
#arg_date DATE = GETDATE(),
#date_begin DATE,
#date_end DATE,
#max_month INT
set #max_month = MONTH(#date)
if #max_month = 1
begin
set #date_end = DATEADD(dd, 1-DATEPART(dy, #arg_date), #arg_date) /* first day of year */
set #date_begin = dateadd(YY, -2, #date_end)
end
else
begin
set #date_end = #arg_date
set #date_begin = dateadd(YY, -1, DATEADD(dd, 1-DATEPART(dy, #date_end), #date_end)) /* first day of year_begin */
end
SELECT *
FROM TABLE1 t
WHERE t.date >= #date_begin and t.date < #date_end
AND (#max_month = 1 OR MONTH(t.date) < #max_month)
another (a better) way is to prepare #periods table variable, put each (date_begin, date_end) pair you need into it and join with TABLE1 - you'll get rid of all function calls from within WHERE clause.
You should realize: you know exactly which periods of each year you need in the result set. There is nothing to compute from stored TABLE1->date column. Just filter it with precomputed date intervals. Don't convert or modify date column - it is already ready to use. Merely apply appropriate filters. MONTH(date) <= 3 is date <= 20170331. Don't torture left part - prepare appropriate right part of such predicates.
The easiest way would be something like:
SELECT *
FROM TABLE1
WHERE
(YEAR(Data)>=YEAR(GETDATE())-2 and YEAR(data)<YEAR(GETDATE()) AND MONTH(GETDATE()) = 1)
OR (YEAR(Data)>=YEAR(GETDATE())-1 and MONTH(data)<MONTH(GETDATE()) and MONTH(GETDATE()) <> 1)
(Note I removed the superfluous and YEAR(data)<=YEAR(data).).
Personally I prefer (and I think it's generally advised) AND/OR logic to a CASE in a WHERE clause.
The error with your CASE statement is caused by the fact that CASE returns an atomic value. It cannot be used in the same way as if in procedural languages.
You can't swap in additional statements to your where clause using case statements. Instead, you need to resolve the case to an equality:
select *
from Table1
where case month(getdate()) -- You want to avoid using functions on fields in your WHERE claises, as this can reduce performance.
when 1 then case when Data >= dateadd(year,datediff(year,0,getdate())-2,0)
and Data < dateadd(year,datediff(year,0,getdate()),0)
then 1 -- Data rows the meet the criteria will return 1.
else 0 -- Data rows that do not will return 0.
end
else case when (Data >= dateadd(year,datediff(year,0,getdate())-1,0)
and Data < dateadd(m,datediff(m,0,getdate())-12,0)
)
or (Data >= dateadd(year,datediff(year,0,getdate()),0)
and Data < dateadd(m,datediff(m,0,getdate()),0)
)
then 1
else 0
end
end = 1 -- Then limit the results to only those rows that returned a 1.
In your specific instance however, this can be simplified to a standard or:
select *
from Table1
where (month(getdate()) = 1
and Data >= dateadd(year,datediff(year,0,getdate())-2,0)
and Data < dateadd(year,datediff(year,0,getdate()),0)
)
or (month(getdate()) <> 1
and (Data >= dateadd(year,datediff(year,0,getdate())-1,0)
and Data < dateadd(m,datediff(m,0,getdate())-12,0)
)
or (Data >= dateadd(year,datediff(year,0,getdate()),0)
and Data < dateadd(m,datediff(m,0,getdate()),0)
)
)
Note the use of brackets above to separate out the logical tests. Where a Data row meets either one of those criteria it will be returned in your query.
What could be wrong with this query:
SELECT
SUM(CASE
WHEN (SELECT TOP 1 ISNULL(StartDate,'01-01-1900')
FROM TestingTable
ORDER BY StartDate Asc) <> '01-01-1900' THEN 1 ELSE 0 END) AS Testingvalue.
The get the error:
Cannot perform an aggregate function on an expression containing an aggregate or a subquery.
As koppinjo stated what your current (broken) query is doing is checking if you have a NULL-value (or StartDate = '01-01-1900') in your table, return either a 1 or a 0 depending on which, and then attempting to SUM that single value.
There are 2 different logical things you want.
Either getting the amount of rows that has a StartDate or checking if any row is missing StartDate.
SELECT --Checking if there is a NULL-value in table
(
CASE WHEN
(SELECT TOP 1 ISNULL(StartDate,'01-01-1900')
FROM TestingTable
ORDER BY StartDate Asc) <> '01-01-1900' THEN 1
ELSE 0
END
) AS TestingValue
SELECT SUM(TestingValue) TestingValue --Give the count of how many non-NULLs there is
FROM
(
SELECT
CASE WHEN
ISNULL(StartDate,'01-01-1900') <> '01-01-1900' THEN 1
ELSE 0
END AS TestingValue
FROM TestingTable
) T
Here is a SQL Fiddle showing both outputs side by side.
Hard to say, but you probably want something like this:
SELECT
SUM(TestingValue)
FROM
(SELECT
CASE
WHEN ISNULL(StartDate,'01-01-1900') <> '01-01-1900'
THEN 1
ELSE 0
END AS TestingValue
FROM TestingTable) t
As your original query is written now, your subquery will return 1 value overall, so your sum would be 1 or 0 always, not to mention it is illegal. To get around that, this SQL will apply the case statement to every row in the TestingTable and insert the result into a derived table (t), then the 'outer' select will sum the results. Hope this helps!
i'm doing a chart, i need to select
SELECT Bid
, ID
, date
, CASE
WHEN status IS NULL THEN 'unsuccessful'
WHEN status = 'Won' THEN 'successful'
WHERE status = 'Won'
OR status IS NULL
But i want that the value from the status example unsucessful is display as field
Changes according to requirements in comments.
As I understand, you need your query to give you four columns: Year, Month, NumberOfWins, NumberOfFails.
Thus grouping by Year and Month is necessary. For each Year and Month combination you need to know number of rows that have status IS NULL condition true, and number of rows, that have status = 'Won' condition true.
Please verify if this query suits your needs:
SELECT
YEAR(date) as Year,
MONTH(date) as Month,
SUM(case when status IS NULL then 1 else 0 end) as NumberOfFails,
SUM(case when status = 'Won' then 1 else 0 end) as NumberOfWins
FROM
<your-table-name-here>
WHERE status = 'Won'
OR status IS NULL
GROUP BY
YEAR(date), MONTH(date)
ORDER BY
Year, Month
Notice, that WHERE condition is only necessary if you have plenty of rows that do not match neither condition (I am not sure whether SQL Server would be able to optimize it).
I've also added ORDER BY clause as you probably would like to order data in your chart.
I've also assumed, that by writing 'month' you actually meant year and month. If that is not true simply remove year related statements from the query.
I have a sample data like this
ID DATE TIME STATUS
---------------------------------------------
A 01-01-2000 0900 ACTIVE
A 05-02-2000 1000 INACTIVE
A 01-07-2000 1300 ACTIVE
B 01-05-2005 1000 ACTIVE
B 01-08-2007 1050 ACTIVE
C 01-01-2010 0900 ACTIVE
C 01-07-2010 1900 INACTIVE
From the above data set, if we only focus on ID='A' we note that A was initally active, then became inactive on 05-02-2000 and then it was inactive until 01-07-2000.
Which means that A was inactive from 05-Feb-2000 to 01-July-2000.
My questions are:
if I execute a query with (ID=A, Date=01-04-2000) it should give me
A 05-02-2000 1000 INACTIVE
because since that date is not available in that data set, it should search for the previous one and print that
Also, if my condition is (ID=A, Date=01-07-2000) it should not only print the value which is present in the table, but also print a previous value
A 05-02-2000 1000 INACTIVE
A 01-07-2000 1300 ACTIVE
I would really appreciate if any one can assist me solve this query. I am trying my best to solve this.
Thank you every one.
Any take on this?
Afaq
Something like the following should work:
SELECT ID, Date, Time, Status
from (select ID, Date, Time, Status, row_number() over (order by Date) Ranking
from MyTable
where ID = #SearchId
and Date <= #SearchDate) xx
where Ranking < 3
order by Date, Time
This will return at most two rows. Its not clear if you are using Date and Time datatyped columns, or if you are actually using reserved words as column names, so you'll have to fuss with that. (I left out Time, but you could easily add that to the various orderings and filterings.)
Given the revised criteria, it gets a bit trickier, as the inclusion or exclusion of a row depends upon the value returned in a different row. Here, the “second” row, if there are two or more rows, is included only if the “first” row equals a particular value. The standard way to do this is to query the data to get the max value, then query it again while referencing the result of the first set.
However, you can do a lot of screwy things with row_number. Work on this:
SELECT ID, Date, Time, Status
from (select
ID, Date, Time, Status
,row_number() over (partition by case when Date = #SearchDate then 0 else 1 end
order by case when Date = #SearchDate then 0 else 1 end
,Date) Ranking
from MyTable
where ID = #SearchId
and Date <= #SearchDate) xx
where Ranking = 1
order by Date, Time
You'll have to resolve the date/time issue, since this only works against dates.
Basically you need to pull a row if, for the specified date, it is:
1) the last record, or
2) the last inactive record.
And the two conditions may match the same row as well as two distinct rows.
Here's how this logic could be implemented in SQL Server 2005+:
WITH ranked AS (
SELECT
ID,
Date,
Time,
Status,
RankOverall = ROW_NUMBER() OVER ( ORDER BY Date DESC),
RankByStatus = ROW_NUMBER() OVER (PARTITION BY Status ORDER BY Date DESC)
FROM Activity
WHERE ID = #ID
AND Date <= #Date
)
SELECT
ID,
Date,
Time,
Status,
FROM ranked
WHERE RankOverall = 1
OR Status = 'INACTIVE' AND RankByStatus = 1