I'm running a query on our SQL (2012) database which returns a count of records in a given date range, grouped by the date.
For example:
Date Count
12/08 12
14/08 19
19/08 11
I need to fill in the blanks as the charts I plot get screwed up because there are missing values. Is there a way to force the SQL to report back a blank row, or a "0" value when it doesn't come across a result?
My query is
SELECT TheDate, count(recordID)
FROM myTable
WHERE (TheDate between '12-AUG-2013 00:00:00' and '20-AUG-2013 23:59:59')
GROUP BY TheDate
Would I need to create a temp table with the records in, then select from that and right join any records from myTable?
Thanks for any help!
If you create a (temporary or permanent) table of the date range, you can then left join to your results to create a result set including blanks
SELECT dates.TheDate, count(recordID)
FROM
( select
convert(date,dateadd(d,number,'2013-08-12')) as theDate
from master..spt_values
where type='p' and number < 9
) dates
left join yourtable on dates.thedate = convert(date,yourtable.thedate)
GROUP BY dates.TheDate
A temp table would do the job but for such a small date range you could go even simpler and use a UNION-ed subquery. E.g:
SELECT dates.TheDate, ISNULL(counts.Records, 0)
FROM
(SELECT TheDate, count(recordID) AS Records
FROM myTable
WHERE (TheDate between '12-AUG-2013 00:00:00' and '20-AUG-2013 23:59:59')
GROUP BY TheDate
) counts
RIGHT JOIN
(SELECT CAST('12-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('13-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('14-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('15-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('16-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('17-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('18-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('19-AUG-2013' AS DATETIME) AS TheDate
UNION ALL SELECT CAST('20-AUG-2013' AS DATETIME) AS TheDate
) dates
ON counts.TheDate = dates.TheDate
Here's a SQL Fiddle Demo.
If you need a more generic (but also more complex) solution, take a look at this excellent answer (by #RedFilter) to a similar question.
Related
I have three tabels, each of them has a date column (the date column is an INT field and needs to stay that way). I need a UNION accross all three tables so that I get the list of unique dates in accending order like this:
20040602
20051215
20060628
20100224
20100228
20100422
20100512
20100615
Then I need to add a column to the result of the query where I subtract one from each date and place it one row above as the end date. Basically I need to generate the end date from the start date somehow and this is what I got so far (not working):
With Query1 As (
Select date_one As StartDate
From table_one
Union
Select date_two As StartDate
From table_two
Union
Select date_three e As StartDate
From table_three
Order By Date Asc
)
Select Query1.StartDate - 1 As EndDate
From Query1
Thanks a lot for your help!
Building on your existing union cte, we can use lead() in the outer query to get the start_date of the next record, and withdraw 1 from it.
with q as (
select date_one start_date from table_one
union select date_two from table_two
union select date_three from table_three
)
select
start_date,
dateadd(day, -1, lead(start_date) over(order by start_date)) end_date
from q
order by start_date
If the datatype the original columns are numeric, then you need to do some casting before applying date functions:
with q as (
select cast(cast(date_one as varchar(8)) as date) start_date from table_one
union select cast(cast(date_two as varchar(8)) as date) from table_two
union select cast(cast(date_three as varchar(8)) as date) from table_three
)
select
start_date,
dateadd(day, -1, lead(start_date) over(order by start_date)) end_date
from q
order by start_date
I have a table that stores patient lab test results. There can be results from multiple tests like Albumin, Potassium, Phosphorus etc. First reading for each patient from each of these categories is stored in a table called #MetricFirstGroupReading.
CREATE TABLE #MetricFirstGroupReading (Patient_Key INT, Metric_Group VARCHAR(100),
Observation_Date DATE)
ALTER TABLE #MetricFirstGroupReading
ADD CONSTRAINT UQ_MetricFirst UNIQUE (Patient_Key, Metric_Group);
INSERT INTO #MetricFirstGroupReading
SELECT 1, 'Albumin', '2018-11-15' UNION
SELECT 1, 'Potassium', '2018-12-10' UNION
SELECT 2, 'Albumin', '2018-10-20' UNION
SELECT 2, 'Potassium', '2018-11-25'
Now, I need to populate all month end dates upto current month into a new table, for each record from the #MetricFirstGroupReading table. Following is the expected result when the query run on December 2018.
I know how to do it using WHILE loops. How to do this without loops, using set based SQL queries, in SQL Server 2016?
Following worked. This is an expansion of the idea present in tsql: How to retrieve the last date of each month between given date range
Query
CREATE TABLE #AllMonthEnds (MonthEndDate DATE)
DECLARE #Start datetime
DECLARE #End datetime
SELECT #Start = '2000-01-01'
SELECT #End = DATEADD(MONTH,1,GETDATE())
;With CTE as
(
SELECT #Start as Date,Case When DatePart(mm,#Start)<>DatePart(mm,#Start+1) then 1 else 0 end as [Last]
UNION ALL
SELECT Date+1,Case When DatePart(mm,Date+1)<>DatePart(mm,Date+2) then 1 else 0 end from CTE
WHERE Date<#End
)
INSERT INTO #AllMonthEnds
SELECT [Date]
FROM CTE
WHERE [Last]=1
OPTION ( MAXRECURSION 0 )
SELECT T.Patient_Key, T.Metric_Group, T.Observation_Date AS First_Observation_Date,
DATEDIFF(MONTh,Observation_Date, MonthEndDate) AS MonthDiff,
A.MonthEndDate AS IterationDate
FROM #AllMonthEnds A
INNER JOIN
(
SELECT *, ROW_NUMBER() OVER(PARTITION BY Patient_Key, Metric_Group ORDER BY Observation_Date) AS RowVal
FROM #MetricFirstGroupReading M
)T
ON A.MonthEndDate >= T.Observation_Date
WHERE RowVal = 1
ORDER BY Patient_Key, Metric_Group, T.Observation_Date, A.MonthEndDate
How about:
select MetricFirstGroupReading.*, datediff(month, MetricFirstGroupReading.Observation_Date, months.monthendval) monthdiff, months.*
into allmonths
from
(
SELECT 1 patientid, 'Albumin' test, '2018-11-15' Observation_Date UNION
SELECT 1 patientid, 'Potassium' test, '2018-12-10' Observation_Date UNION
SELECT 2 patientid, 'Albumin' test, '2018-10-20' Observation_Date UNION
SELECT 2 patientid, 'Potassium' test, '2018-11-25' Observation_Date) MetricFirstGroupReading
join
(
select '2018-10-31' monthendval union
select '2018-11-30' monthendval union
select '2018-12-31' monthendval
) months on MetricFirstGroupReading.Observation_Date< months.monthendval
Replace the first select union with your table, and add or remove month ends from the second inner select.
Consider building a temp table of all 12 month end dates, then join to main table by date range. Use DateDiff for month difference:
CREATE TABLE #MonthEndDates (Month_End_Value DATE)
INSERT INTO #MonthEndDates
VALUES ('2018-01-31'),
('2018-02-28'),
('2018-03-31'),
('2018-04-30'),
('2018-05-31'),
('2018-04-30'),
('2018-06-30'),
('2018-07-31'),
('2018-08-31'),
('2018-09-30'),
('2018-10-31'),
('2018-11-30'),
('2018-12-31')
SELECT m.Patient_Key, m.Metric_Group, m.Observation_Date,
DateDiff(month, m.Observation_Date, d.Month_End_Value) AS Month_Diff,
d.Month_End_Value
FROM #MetricFirstGroupReading m
INNER JOIN #MonthEndDates d
ON m.Observation_Date < d.Month_End_Value
GO
Rextester Demo
I have a table with the following structure:
ID: StartDate: EndDate
I want to show all dates in the date range for each ID.
Eg
ID = 1: StartDate = 01/01/2018: EndDate = 03/01/2018
ID: 1 01/01/2018
ID: 1 02/01/2018
ID: 1 03/01/2018
I think i need to use a cross join but im unsure how to create this for multiple rows?
Here is the CTE for SQL Server, the syntax is somewhat different:
declare #startdate date = '2018-01-01';
declare #enddate date = '2018-03-18';
with
dates as (
select #startdate as [date]
union all
select dateadd(dd, 1, [date]) from dates where [date] < #enddate
)
select [date] from dates
So i ended up using a date table and just cross referencing that
select *
from Date d
inner join WorkingTable w
on d.Date >= w.StartDate
and d.date < w.EndDate
In standard SQL you can use a recursive CTE:
with recursive dates as (
select date '2018-01-01' as dte
union all
select dte + interval '1 day'
from dates
where dte < date '2018-01-03'
)
select dte
from dates;
The exact syntax (whether recursive is needed and date functions) differ among databases. Not all databases support this standard functionality.
Now got this for only one id..,
create table #dateTable(id int, col1 date, col2 date)
insert into #dateTable values(1,'05-May-2018','08-May-2018') ,(2,'05-May-2018','05-May-2018')
select *from #dateTable
with cte(start, ends) as(
select start = (select top 1 col1 from #dateTable), ends = (select top 1 col2 from #dateTable)
union all
select DATEADD(dd,1,start),ends from cte where start <> ends
)select start from cte option (maxrecursion 10)
I'm still working... I update soon...!
I have a table, part of which is given below. It contain multiple values (durations) per day. I need two things 1) addition of durations per day. 2) plotting them on calendar in such a way that startdate is first_date from the table and last_date is Last_update from the table. I want to mention 0 for which date there is no duration. I think it will something like below but need help.
;WITH AllDates AS(
SELECT #Fromdate As TheDate
UNION ALL
SELECT TheDate + 1
FROM AllDates
WHERE TheDate + 1 <= #ToDate
)SELECT UserId,
TheDate,
COALESCE(
SUM(
-- When the game starts and ends in the same date
CASE WHEN DATEDIFF(DAY, GameStartTime, GameEndTime) = 0
Here is what I am looking for
Another way to generate the date range you are after would be something like .....
;WITH DateLimits AS
(
SELECT MIN(First_Date) FirstDate
,MAX(Last_Update) LastDate
FROM TableName
),
DateRange AS
(
SELECT TOP (SELECT DATEDIFF(DAY,FirstDate,LastDate ) FROM DateLimits)
DATEADD(DAY
,ROW_NUMBER() OVER (ORDER BY (SELECT NULL))
, (SELECT FirstDate FROM DateLimits)
) AS Dates
FROM master..spt_values a cross join master..spt_values b
)
SELECT * FROM DateRange --<-- you have the desired date range here
-- other query whatever you need.
Hello everyone it's been some days that I use sql to make analysis and I meet all kinds of problems that I solves thanks to your forum.
Now I'd like to create a view that recuperates the interval of time and shows in detail the dates in this interval.
I have the following table:
And I want to create the view that displays the result:
For example in the player1 MyTable to play five days from 01/01/2012
to 05/01/2012. So the view displays 5 lines for player1 with the date 01/01/2012, 02/01/2012, 03/01/2012, 04/01/2012, 05/01/2012.
Thank you in advance for your help.
You have to create a common table expression that give you the date range ( i have created a date range of the current month but you can choice another range) :
WITH DateRange(dt) AS
(
SELECT CONVERT(datetime, '2012-01-01') dt
UNION ALL
SELECT DATEADD(dd,1,dt) dt FROM DateRange WHERE dt < CONVERT(datetime, '2012-01-31')
)
SELECT dates.dt AS DatePlaying, PlayerName
FROM MyTable t
JOIN DateRange dates ON dt BETWEEN t.BeginDate AND t.DateEnd
ORDER BY PlayerName, DatePlaying
Another approach to this is simply to create an enumeration table to add values to dates:
with enumt as (select row_number() over (order by (select NULL)) as seqnum
from mytable
)
select dateadd(d, e.seqnum, mt.DateBegin) as DatePlaying, mt.PlayerName
from MyTable mt join
enum e
on enumt.seqnum <= e.NumberOfPlayingDay
The only purpose of the "with" clause is to generate a sequence of integers starting at 1.