I need some help structuring a query to only pull back recurrences that are after a set number of days, in my case 30.
My table structure is as follows:
PatientID Date
1 2015-09-01
1 2015-09-03
2 2015-03-04
2 2015-03-07
2 2015-09-15
In this example, I only want to return rows 1, 3, and 5.
I tried doing a left join on itself, where the date in the second is > DATEADD(D,30,Date).
My other thought was a recursive CTE with the first query pulling the min date for each patient then a union where the table date was at least 30 days greater than the max of each patients CTE date but you can't have a max in the join statement.
I'm pretty stumped. Any advice would be greatly appreciated.
This is how I would do it:
SELECT * FROM MyTable t1
WHERE NOT EXISTS(
SELECT * FROM MyTable t2
WHERE t1.PatientId=t2.PatientId
AND t2.Date < t1.Date
AND DATEDIFF(dd, t2.Date, t1.Date) < 30
)
ORDER BY t1.PatientId, t1.Date ASC
I think something like this should work (notepad coding here, so the syntax may be a little off)
WITH CTE(
SELECT PatientId, Min(Date) as Date
FROM MyTable
Group BY PatientId)
SELECT A.*
FROM MyTable A
LEFT OUTER JOIN CTE CTE
ON A.PatientId = CTE.PatientId
AND (A.Date = CTE.Date OR A.Date > DATEAdd(dd, 30, CTE.Date)
WHERE CTE.PatientId IS NOT NULL
Related
I have the following query where I input a date and it give me the result. However, I need to run this for 60 different dates. Instead of running this 1 by 1, is there anyway to automate this so it runs each time on a different date?
IF OBJECT_ID('tempdb..#1') IS NOT NULL DROP TABLE #1
declare #d1 datetime = '2020-02-06'
select distinct [User] into #1
from [X].[dbo].[Table1]
where [status] = 'Success'
and [Date] = #d1;
select count(distinct [User])
from #1
inner join [Y].[dbo].[Table2]
on #1.[User] = [Y].[dbo].[Table2].User
where [Date2] between #d1 and #d1+1
and [Checkname] in ('Check1','Check2')
Loops are slow and generally a bad practice in the context of T-SQL. You can use something like this to get the count of users for a batch of dates:
DROP TABLE IF EXISTS #DataSource;
CREATE TABLE #DataSource
(
[Date] DATETIME
,[UsersCount] INT
);
INSERT INTO #DataSource ([Date])
VALUES ('2020-02-06')
,('2020-02-07')
,('2020-02-08');
IF OBJECT_ID('tempdb..#1') IS NOT NULL DROP TABLE #1
select distinct DS1.[Date]
,DS1.[User]
into #1
from [X].[dbo].[Table1] DS1
INNER JOIN #DataSource DS2
ON DS1.[Date] = DS2.[Date]
where DS1.[status] = 'Success';
select #1.[date]
,count(distinct [User])
from #1
inner join [Y].[dbo].[Table2]
on #1.[User] = [Y].[dbo].[Table2].User
where [Date2] between #1.[date] and #1.[date] + 1
and [Checkname] in ('Check1','Check2')
GROUP BY #1.[date]
First, I want to say that gotqn's answer is a good answer - however, I think there are a few more things in the original code that can be improved - so here is how I would probably do it:
Assuming the dates are consecutive, use a common table expression to calculate the dates using dateadd and row_number.
Then, use another common table expression to get the list of dates and users from table1,
and then select the date and count of distinct users for each date from that common table expression joined to table2:
DECLARE #StartDate Date = '2020-02-06';
WITH Dates AS
(
SELECT TOP (60) DATEADD(DAY, ROW_NUMBER() OVER(ORDER BY ##SPID) -1, #StartDate) As Date
FROM sys.objects
), CTE AS
(
SELECT t1.[User], t1.[Date]
FROM [X].[dbo].[Table1] AS t1
JOIN Dates
ON t1.[Date] = Dates.[Date]
WHERE [status] = 'Success'
)
SELECT cte.[Date], COUNT(DISTINCT [User])
FROM CTE
JOIN [Y].[dbo].[Table2] As t1
ON CTE.[User] = t1.[User]
AND t1.[Date2] >= CTE.[Date]
AND t1.[Date2] < DATEADD(Day, 1, CTE.[Date])
AND [Checkname] IN ('Check1','Check2')
GROUP BY cte.[Date]
If the dates are not consecutive, you can use a table variable to hold the dates instead of calculating them using a common table expression.
I have been trying to filter one table by two dates with an order of importance (date2 > date1) as follows:
SELECT
t1.customer, t1.weights, t1.max(t1.date1) as date1, t1.date2
FROM
(SELECT *
FROM table
WHERE CAST(date2 AS smalldatetime) = '10/29/2017') t2
INNER JOIN
table t1 ON t1.customer = t2.customer
AND t1.date2 = t2.date2
GROUP BY
t1.customer, t1.date2
ORDER BY
t1.customer;
It filters the table correctly by date2 first, the max(t1.date1) doesn't what I want it to do though. I get duplicate customers, that share the same (and correct) date2, but show different date1's. These duplicate records have the following in common: The weight row is different. What would I need to do to output just the the customer records connected to the most current date1 without taking other columns into consideration?
I am still a noob, help would be greatly appreciated!
Solution for t-sql (all based on the accepted answer):
SELECT * FROM (
SELECT row_number() over(partition by t1.customer order by t1.date1 desc) as rownum, t1.customer, t1.weights, t1.date1 , t1.date2
FROM
(SELECT *
FROM table
WHERE CAST(date2 AS smalldatetime) = '10/29/2017') t2
INNER JOIN
table t1 ON t1.customer = t2.customer
AND t1.date2 = t2.date2
)t3
where rownum = 1;
If I understood correctly, then instead of a group by logic, I would just use a qualify row statement :)
Try the code below and tell me if it's what you needed - what I'm telling it to do is to bring back only one row per customer ID....but where we select the row based on the dates (by sorting them in ascending order) - however, I'm unclear of what you mean by importance of the 2 dates so I may be completely off base here...can you please give an example of input and desired output?
SELECT t1.customer, t1.weights, t1.date1, t1.date2
FROM
(
Select *
FROM table
WHERE Cast(date2 as smalldatetime)='10/29/2017'
) t2
Inner Join table t1
ON t1.customer = t2.customer
AND t1.date2 = t2.date2
Qualify row_number() over(partition by t1.customer order by date2 , date1)=1
Order By t1.customer;
I have one table in SQL where I want to update the End date which should be minus one day of Start date of next row. Also condition is that row should be of same project with "same resources" for same employee.
For example, in above table for project ignition End date of first record should be minus one day of Start date of second record. Same for another project also.
I have tried the self join for this as I want to compare two rows of same table but it does not work for exact result for me :-(
I think you can use LEAD function like this:
UPDATE yourTable
SET EXPECTEDENDDATE = ISNULL(DATEADD(DAY, 1,
LEAD(EXPECTEDSTARETDATE) OVER (PARTITION BY ProjectName
ORDER BY EXPECTEDSTARETDATE), EXPECTEDSTARETDATE);
here i put the logic how can we achieve it please customize it according to you i hope this will help you
declare #temp table
(name nvarchar(44),
startdate date,
enddate date
)
insert into #temp values ('one', '2015-07-01', '2015-07-31')
insert into #temp values ('one', '2015-01-16', '2015-12-31')
insert into #temp values ('two', '2015-07-01', '2015-07-31')
insert into #temp values ('two', '2015-07-01', '2015-11-30')
;WITH CTE AS (
SELECT
rownum = ROW_NUMBER() OVER (ORDER BY p.name),
p.name,
p.startdate,
p.enddate
FROM #temp p
)
SELECT CTE.name,
--CTE.startdate,CTE.enddate,
--prev.enddate PreviousValue,
--nex.enddate NextValue,
DATEDIFF(day,CTE.enddate,nex.enddate) diff
FROM CTE
LEFT JOIN CTE prev ON prev.rownum = CTE.rownum - 1
LEFT JOIN CTE nex ON nex.rownum = CTE.rownum + 1
I have to query a set of running total data by month.
e.g.
Month Amount Total
2014-01-01 100 100
2014-01-02 100 200
2014-01-03 100 300
The application does not allow to create a view or SP. It is able to select data from a table directly.
e.g.
select Month,
Amount,
Total -- This is my problem.
from Table -- This is a table only.
Any ideas are welcome, thank you.
You can use OUTER APPLY:
SELECT T.Month,T.Amount,T2.Total
FROM Table1 T
OUTER APPLY
( SELECT Total = SUM(Amount)
FROM Table1 T2
WHERE T2.Month <= T.Month
) T2;
Or a correlated subquery:
SELECT T.Amount,
( SELECT Amount = SUM(Amount)
FROM Table1 T2
WHERE T2.Month <= T.Month
)
FROM Table1 T
The easiest way is to use SQL Server 2012 because it has cumulative sum built-in:
select Month, Amount,
sum(Amount) over (order by Month) as Total -- This is my problem.
from Table;
The correlated subquery method follows a similar structure:
select Month, Amount,
(select sum(Amount) from table t2 where t2.Month <= t.Month) as Total
from Table t;
These are usually the two methods that I would consider, because both are standard SQL. As Vignesh points out you can do it with cross apply as well (although as I write this, his query is not correct).
Here is a second way to create a running total:
SELECT t.month, t.amount,
SUM(t.amount) OVER(PARTITION BY t.month ORDER BY t.month
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) as [Total]
FROM [yourTable] AS t
does anyone know how can I subtract top two rows from one column only using one id? Here's my sample query:
SELECT top 2 a.consumption,
coalesce(a.consumption -
(SELECT b.consumption
FROM tbl_t_billing b
WHERE b.id = a.id + 1), a.consumption) AS diff
FROM tbl_t_billing a
WHERE a.customerId = '5'
ORDER BY a.dateCreated DESC
I want to know how to get the difference between the top 2 rows using one id from the consumption column using the customerId #5. I've tried but I can't get the right query for that. Can somebody help me please? Thanks!
try this:
;with cte as
(
select consumption, customerId,
row_number() over (partiton by customerid order by datecreated desc) rn
from tbl_t_billing where customerId = '5'
)
select a.customerId, a.consumption,
coalesce((a.consumption - b.consumption), a.consumption) consumption_diff
from cte a left outer join cte b on a.rn + 1 = b.rn
where a.rn = 1
declare #tbl_t_billing table(consumption int, customerId int, datecreated datetime)
insert into #tbl_t_billing
values
(10,5,'20100101'),
(7,5,'20000101'),
(9,4,'20100101'),
(5,4,'20000101'),
(8,3,'20100101'),
(3,3,'20000101'),
(7,2,'20100101'),
(3,2,'20000101'),
(4,1,'20100101'),
(2,1,'20000101')
-- get the difference between the last two consumption values for each customerId
select
customerId,
sum(consumption) diff
from(
select
customerId,
consumption *
case row_number() over(partition by customerId order by datecreated desc)
when 1 then 1 when 2 then -1
end consumption
from #tbl_t_billing
) t
group by customerId