how to display weekdays from below two days (Monday and Friday) Using SQL QUERY?
Date_From= 01/03/2011
Date_To =15/03/2011
I need output like below
Date_From Date_To
01/03/2011 01/03/2011
04/03/2011 04/03/2011 'Friday
05/03/2011 06/03/2011
07/03/2011 07/03/2011 'Monday
08/03/2011 10/03/2011
11/03/2011 11/03/2011 'Friday
12/03/2011 13/03/2011
14/03/2011 14/03/2011 'Monday
15/03/2011 15/03/2011
hoping your help
select
t1.Date_From,
t1.Date_To,
case when DATENAME(dw,t1.Date_to) IN ('friday','monday') THEN DATENAME(dw,t1.Date_to) else NULL END
from table t1
This is using Oracle. I can get the 15th to show up if I use Oracle analytic functions, but I don't know of a portable way to get the result in one row to depend on the existence of other rows. Also, due to the Cartesian product, do not use this without limiting it to a small number of rows.
select to_char(d1.d, 'DD/MM/YYYY')
, to_char(d2.d, 'DD/MM/YYYY')
, decode(d1.n, 'MONDAY', '''Monday', 'FRIDAY', '''Friday')
from (select to_date('2011-02-28') + rownum as d
, to_char(to_date('2011-02-28') + rownum, 'FMDAY') as n
from user_objects where rownum <= 15) d1
, (select to_date('2011-02-28') + rownum as d
, to_char(to_date('2011-02-28') + rownum, 'FMDAY') as n
from user_objects where rownum <= 15) d2
where d1.d <= d2.d
and d2.d - d1.d < 7
and ((d1.d = d2.d and d1.n in ('MONDAY', 'FRIDAY'))
or (d1.n = 'TUESDAY' and d2.n = 'THURSDAY')
or (d1.n = 'SATURDAY' and d2.n = 'SUNDAY'))
order by d1.d, d2.d;
This is for SQL Server 2005+.
DECLARE #Date_From datetime, #Date_To datetime;
SET #Date_From = '20110301';
SET #Date_To = '20110315';
WITH datelist AS (
SELECT
Date = #Date_From,
GroupID = 1
UNION ALL
SELECT
Date = DATEADD(day, 1, Date),
GroupID = CASE
WHEN DATENAME(dw, Date) IN ('Sunday', 'Monday', 'Thursday', 'Friday')
THEN 1
ELSE 0
END + GroupID
FROM datelist
WHERE Date < #Date_To
)
SELECT
Date_From = MIN(Date),
Date_To = MAX(Date)
FROM datelist
GROUP BY GroupID
Output:
Date_From Date_To
----------------------- -----------------------
2011-03-01 00:00:00.000 2011-03-03 00:00:00.000
2011-03-04 00:00:00.000 2011-03-04 00:00:00.000
2011-03-05 00:00:00.000 2011-03-06 00:00:00.000
2011-03-07 00:00:00.000 2011-03-07 00:00:00.000
2011-03-08 00:00:00.000 2011-03-10 00:00:00.000
2011-03-11 00:00:00.000 2011-03-11 00:00:00.000
2011-03-12 00:00:00.000 2011-03-13 00:00:00.000
2011-03-14 00:00:00.000 2011-03-14 00:00:00.000
2011-03-15 00:00:00.000 2011-03-15 00:00:00.000
Related
I have a query getting the days in particular day that I selected and show the days in a month. My problem is that I need every two weeks of the month. And I also need to get long date format: dddd, dd MMMM yyyy and eliminate the time. Please help me.
DECLARE #startDate DATETIME = '9/1/2019'
DECLARE #endDate DATETIME = '12/31/2019'
DECLARE #dayOfWeek INT = 1;
WITH cte_Recursion AS
(
SELECT #startDate AS [Date]
UNION ALL
SELECT DATEADD(DAY, 1, [Date])
FROM cte_Recursion
WHERE [Date] < #endDate
)
SELECT [Date]
FROM cte_Recursion
WHERE DATEPART(WEEKDAY, [Date]) = #dayOfWeek
OPTION (MAXRECURSION 0)
The data returned looks like this:
2019-09-01 00:00:00.000
2019-09-08 00:00:00.000
2019-09-15 00:00:00.000
2019-09-22 00:00:00.000
2019-09-29 00:00:00.000
2019-10-06 00:00:00.000
2019-10-13 00:00:00.000
2019-10-20 00:00:00.000
2019-10-27 00:00:00.000
2019-11-03 00:00:00.000
2019-11-10 00:00:00.000
2019-11-17 00:00:00.000
2019-11-24 00:00:00.000
And I need to get like this (every other week):
2019-09-01 00:00:00.000
2019-09-15 00:00:00.000
2019-09-29 00:00:00.000
2019-10-13 00:00:00.000
2019-10-27 00:00:00.000
2019-11-10 00:00:00.000
2019-11-24 00:00:00.000
By changing your CTE to start on the correct day of the week, you can then change the recursion to add 14 days instead of 1, giving you the desired result without further manipulation:
DECLARE #startDate DATETIME = '9/1/2019'
DECLARE #endDate DATETIME = '12/31/2019'
DECLARE #dayOfWeek INT = 1;
WITH cte_Recursion AS
(SELECT DATEADD(DAY, ((#dayOfWeek - DATEPART(WEEKDAY, #startDate)) % 7 + 7) %7, #startDate) AS [Date]
UNION ALL SELECT DATEADD(DAY, 14, [Date])
FROM cte_Recursion
WHERE DATEADD(DAY, 14, [Date]) < #endDate)
SELECT [Date] FROM cte_Recursion
Output:
Date
01/09/2019 00:00:00
15/09/2019 00:00:00
29/09/2019 00:00:00
13/10/2019 00:00:00
27/10/2019 00:00:00
10/11/2019 00:00:00
24/11/2019 00:00:00
08/12/2019 00:00:00
22/12/2019 00:00:00
Demo on dbfiddle
To change the date format to dddd, dd MMMM yyyy, simply replace the final SELECT with:
SELECT FORMAT([Date], 'dddd, dd MMMM yyyy') AS [Date] FROM cte_Recursion
Output:
Date
Sunday, 01 September 2019
Sunday, 15 September 2019
Sunday, 29 September 2019
Sunday, 13 October 2019
Sunday, 27 October 2019
Sunday, 10 November 2019
Sunday, 24 November 2019
Sunday, 08 December 2019
Sunday, 22 December 2019
Demo on dbfiddle
you can use it :
DECLARE #startDate DATETIME = '9/1/2019'
DECLARE #endDate DATETIME = '12/31/2019'
DECLARE #dayOfWeek INT = 1;
WITH cte_Recursion AS
(
SELECT #startDate AS [Date]
UNION ALL SELECT DATEADD(DAY, 1, [Date])
FROM cte_Recursion WHERE [Date] < #endDate
)
SELECT [Date] FROM cte_Recursion
WHERE DATEPART(WEEKDAY, [Date]) = #dayOfWeek
and DATEPART(WEEK, [Date]) % 2 = 0
OPTION (MAXRECURSION 0)
You could use a recursive CTE as
WITH CTE AS
(
SELECT '2019-09-01 00:00:00.000' ADate
UNION SELECT '2019-09-08 00:00:00.000'
UNION SELECT '2019-09-15 00:00:00.000'
UNION SELECT '2019-09-22 00:00:00.000'
UNION SELECT '2019-09-29 00:00:00.000'
UNION SELECT '2019-10-06 00:00:00.000'
UNION SELECT '2019-10-13 00:00:00.000'
UNION SELECT '2019-10-20 00:00:00.000'
UNION SELECT '2019-10-27 00:00:00.000'
UNION SELECT '2019-11-03 00:00:00.000'
UNION SELECT '2019-11-10 00:00:00.000'
UNION SELECT '2019-11-17 00:00:00.000'
UNION SELECT '2019-11-24 00:00:00.000'
),
F AS
(
SELECT CAST('2019-09-01 00:00:00.000' AS DATETIME) ADate
UNION ALL
SELECT DATEADD(Day, 14, F.ADate)
FROM F
WHERE ADate < '2019-11-24 00:00:00.000'
)
SELECT *
FROM F;
How can i get the First Date and Last Date between selected months?
For example I Enter year 2015, and month 09 to 2016 08
The return values must be:
StartDate EndDate
20150901 20150930
20151001 20151031
20151101 20151130
20151201 20151231
20160101 20160131
20160201 20160229
20160301 20160331
20160401 20160430
20160501 20160531
20160601 20160630
20160701 20160731
20160801 20160831
I've found multiple queries that do the same but just for 1 inserted date. for example:
DECLARE #mydate DATETIME
SELECT #mydate = GETDATE()
SELECT CONVERT(VARCHAR(25),DATEADD(dd,-(DAY(#mydate)-1),#mydate),101) AS Date_Value,
'First Day of Current Month' AS Date_Type
UNION
SELECT CONVERT(VARCHAR(25),DATEADD(dd,-(DAY(DATEADD(mm,1,#mydate))),DATEADD(mm,1,#mydate)),101) ,
'Last Day of Current Month'
But I couldn't find one that can do this for Between statement
I have two udf's which can be used independently or in conjunction. They dynamically create date ranges with variable dateparts and/or increments.
Select * from [dbo].[udf-Create-Range-Date-Span]('2015-09-01','2016-08-01','MM',1)
DateR1 DateR2
2015-09-01 00:00:00.000 2015-10-01 00:00:00.000
2015-10-01 00:00:00.000 2015-11-01 00:00:00.000
2015-11-01 00:00:00.000 2015-12-01 00:00:00.000
2015-12-01 00:00:00.000 2016-01-01 00:00:00.000
2016-01-01 00:00:00.000 2016-02-01 00:00:00.000
2016-02-01 00:00:00.000 2016-03-01 00:00:00.000
2016-03-01 00:00:00.000 2016-04-01 00:00:00.000
2016-04-01 00:00:00.000 2016-05-01 00:00:00.000
2016-05-01 00:00:00.000 2016-06-01 00:00:00.000
2016-06-01 00:00:00.000 2016-07-01 00:00:00.000
2016-07-01 00:00:00.000 2016-08-01 00:00:00.000
Now, I specifically use the cap so I can query data (including time) which are between the DateR1 and DateR2 and
However, with a little twist, you can change the output. For example:
Select DateR1=cast(DateR1 as Date),DateR2=DateAdd(DD,-1,cast(DateR2 as Date)) from [dbo].[udf-Create-Range-Date-Span]('2015-09-01','2016-08-01','MM',1)
DateR1 DateR2
2015-09-01 2015-09-30
2015-10-01 2015-10-31
2015-11-01 2015-11-30
2015-12-01 2015-12-31
2016-01-01 2016-01-31
2016-02-01 2016-02-29
2016-03-01 2016-03-31
2016-04-01 2016-04-30
2016-05-01 2016-05-31
2016-06-01 2016-06-30
2016-07-01 2016-07-31
The two function are as follows:
CREATE FUNCTION [dbo].[udf-Create-Range-Date] (#DateFrom datetime,#DateTo datetime,#DatePart varchar(10),#Incr int)
Returns
#ReturnVal Table (RetVal datetime)
As
Begin
With DateTable As (
Select DateFrom = #DateFrom
Union All
Select Case #DatePart
When 'YY' then DateAdd(YY, #Incr, df.dateFrom)
When 'QQ' then DateAdd(QQ, #Incr, df.dateFrom)
When 'MM' then DateAdd(MM, #Incr, df.dateFrom)
When 'WK' then DateAdd(WK, #Incr, df.dateFrom)
When 'DD' then DateAdd(DD, #Incr, df.dateFrom)
When 'HH' then DateAdd(HH, #Incr, df.dateFrom)
When 'MI' then DateAdd(MI, #Incr, df.dateFrom)
When 'SS' then DateAdd(SS, #Incr, df.dateFrom)
End
From DateTable DF
Where DF.DateFrom < #DateTo
)
Insert into #ReturnVal(RetVal) Select DateFrom From DateTable option (maxrecursion 32767)
Return
End
AND
CREATE FUNCTION [dbo].[udf-Create-Range-Date-Span] (#Date1 datetime,#Date2 datetime,#DatePart varchar(10),#Incr int)
-- Syntax Select * from [dbo].[udf-Create-Range-Date-Span]('2016-10-01','2020-10-01','YY',1)
-- Syntax Select * from [dbo].[udf-Create-Range-Date-Span]('2016-01-01','2016-12-31','MM',1)
-- Syntax Select * from [dbo].[udf-Create-Range-Date-Span]('2016-10-01','2016-10-31','MI',15)
-- Syntax Select * from [dbo].[udf-Create-Range-Date-Span]('2016-10-01','2016-10-02','SS',1)
Returns Table
As
Return (
Select DateR1 = RetVal
,DateR2 = LEAD(RetVal,1,#Date2) OVER (ORDER BY RetVal)
From (Select * from [dbo].[udf-Create-Range-Date](#Date1,#Date2,#DatePart,#Incr) ) A
Where RetVal<#Date2
)
You don't need UDFs for this - You can do this with a single query:
Declare #FromYear Int = 2015,
#FromMonth Int = 9,
#ToYear Int = 2016,
#ToMonth Int = 8
Declare #FromDate Date = (Select DateAdd(Year, #FromYear - 1900, DateAdd(Month, #FromMonth - 1, 0))),
#ToDate Date = (Select DateAdd(Year, #ToYear - 1900, DateAdd(Month, #ToMonth - 1, 0)))
;With Date (Date) As
(
Select #FromDate Union All
Select DateAdd(Month, 1, Date)
From Date
Where Date < #ToDate
)
Select Convert(Varchar, Year(Date)) + Right('00' + Convert(Varchar, Month(Date)), 2) + Right('00' + Convert(Varchar, Day(Date)), 2) As StartDate,
Convert(Varchar, Year(Date)) + Right('00' + Convert(Varchar, Month(Date)), 2) + Right('00' + Convert(Varchar, Day(DateAdd(Day, -1, DateAdd(Month, DateDiff(Month, 0, Date) + 1, 0)))), 2) As EndDate
From Date
Option (MaxRecursion 0)
Output
StartDate EndDate
20150901 20150930
20151001 20151031
20151101 20151130
20151201 20151231
20160101 20160131
20160201 20160229
20160301 20160331
20160401 20160430
20160501 20160531
20160601 20160630
20160701 20160731
20160801 20160831
If you're able to move to SQL Server 2012 or later, however, the query is much simpler:
Declare #FromYear Int = 2015,
#FromMonth Int = 9,
#ToYear Int = 2016,
#ToMonth Int = 8
Declare #FromDate Date = DateFromParts(#FromYear, #FromMonth, 1),
#ToDate Date = DateFromParts(#ToYear, #ToMonth, 1)
;With Date (Date) As
(
Select #FromDate Union All
Select DateAdd(Month, 1, Date)
From Date
Where Date < #ToDate
)
Select Format(Date, N'yyyyMMdd') As StartDate,
Format(EoMonth(Date), N'yyyyMMdd') As EndDate
From Date
Option (MaxRecursion 0)
Try this. Its also a very small script. I like the idea of the CTE from Siyual. But this is much shorter.
DECLARE #inputYear INT = 2015,
#inputMonth INT = 09
SELECT DATEADD(MONTH, #inputMonth-1, DATEADD(YEAR, #inputYear-1900, 0)) AS FirstDayOfTheMonth,
DATEADD(s,-1, DATEADD(MONTH, #inputMonth, DATEADD(YEAR, #inputYear-1900, 0))) AS LastDayOfTheMonth
Your task is also possible using one single ANSI sql statement.
However, you need two tables ALL_YEARS and ALL_MONTHS that contain the used set of years and month.
E.g. if you consider possible years between 1900 and 2099, the table ALL_YEARS must contain the numbers between 1900 and 2099.
The table ALL_MONTHS must contain the numbers between 1 and 12.
Using these two tables, the statement looks as follows:
select to_date('01.' || to_char(all_months.month_value) || '.' || to_char(all_years.year_value ), 'dd.mm.yyyy') first_day ,
add_months(to_date('01.' || to_char(all_months.month_value) || '.' || to_char(all_years.year_value ), 'dd.mm.yyyy'), 1) -1 last_day
from all_years,
all_months
where to_date('01.' || to_char(all_months.month_value) || '.' || to_char(all_years.year_value ), 'dd.mm.yyyy') between
to_date('01.02.2014', 'dd.mm.yyyy') and
to_date('01.07.2016', 'dd.mm.yyyy');
The output is as follows:
01.02.14 28.02.14
01.03.14 31.03.14
01.04.14 30.04.14
01.05.14 31.05.14
01.06.14 30.06.14
...
01.06.16 30.06.16
01.07.16 31.07.16
I have two attendance tables.One isemployeelist and another is attendence_info.Employeelist contain Emp_Id and Emp_name. Attendance_info is Emp_Id, Date.As below:
Emp_ID Date
----------- -----------------------
1 2014-12-11 00:00:00.000
2 2014-12-11 00:00:00.000
4 2014-12-11 00:00:00.000
5 2014-12-11 00:00:00.000
2 2014-12-10 00:00:00.000
4 2014-12-10 00:00:00.000
5 2014-12-10 00:00:00.000
1 2014-12-09 00:00:00.000
2 2014-12-09 00:00:00.000
3 2014-12-09 00:00:00.000
Here each date some id are absent. I want to find out all absent list with date.Please help to find it by Sql server query. My desired output should be as below:
absentId Date
3 2014-12-11 00:00:00.000
1 2014-12-10 00:00:00.000
3 2014-12-10 00:00:00.000
4 2014-12-09 00:00:00.000
5 2014-12-09 00:00:00.000
You can do this by generating a list of all employees and dates and then removing the ones where the employee is present. This is basically a cross join and left join:
select el.emp_id, d.date
from (select distinct date from Attendance_info) d cross join
employeelist el left join
Attendance_info ai
on ai.date = d.date and ai.emp_id = el.emp_id
where ai.emp_id is null;
select e.Emp_ID as absentId,a.Date as date
from employeelist e
join attendence_info a
on e.Emp_ID=a.Emp_ID
order by a.Date
DECLARE #StartDate DATETIME = '2014-12-09'
DECLARE #EndDate DATETIME = '2014-12-11'
;WITH MyCte ([Date])
AS
(
SELECT [Date] = #StartDate
UNION ALL
SELECT DATEADD(DAY, 1, [Date]) FROM MyCte WHERE [Date] < #EndDate
)
,EmployeeList ([EmpID], [Date])
AS
(
SELECT 1, '2014-12-11 00:00:00.000' UNION
SELECT 2, '2014-12-11 00:00:00.000' UNION
SELECT 4, '2014-12-11 00:00:00.000' UNION
SELECT 5, '2014-12-11 00:00:00.000' UNION
SELECT 2, '2014-12-10 00:00:00.000' UNION
SELECT 4, '2014-12-10 00:00:00.000' UNION
SELECT 5, '2014-12-10 00:00:00.000' UNION
SELECT 1, '2014-12-09 00:00:00.000' UNION
SELECT 2, '2014-12-09 00:00:00.000' UNION
SELECT 3, '2014-12-09 00:00:00.000'
)
SELECT DISTINCT E.[EmpID], M.[Date]
FROM EmployeeList E
CROSS APPLY (SELECT [Date] FROM MyCTE WHERE [Date] NOT IN (SELECT [Date] FROM EmployeeList WHERE EmpID = E.EmpID)) M
I have a table of Date and a column of ID,FromDate and ToDate shown at below
ID FromDate ToDate
-- -------------- --------------
1 2013-06-10 00:00:00 2013-06-30 00:00:00
2 2013-05-10 00:00:00 2013-06-10 00:00:00
3 2012-08-01 00:00:00 2012-12-31 00:00:00
4 2013-07-10 00:00:00 2013-07-30 00:00:00
I doing a checking query and make a column as Result whether is active, inactive or expired by using [getdate] shown at below
Select ID, FromDate, ToDate,
(case when convert(varchar(8),FromDate,112) <= convert(varchar(8),getdate(),112)
and convert(varchar(8),ToDate,112) <= convert(varchar(8),getdate(),112) then 'Expired'
when convert(varchar(8),FromDate,112) <= convert(varchar(8),getdate(),112)
and convert(varchar(8),ToDate,112) >= convert(varchar(8),getdate(),112) then 'Active'
when convert(varchar(8),FromDate,112) >= convert(varchar(8),getdate(),112)
and convert(varchar(8),ToDate,112) >= convert(varchar(8),getdate(),112) then 'Inactive' end )'Result'
from Date
It will show the correct result
ID FromDate ToDate Result
-- -------------- -------------- --------
1 2013-06-10 00:00:00 2013-06-30 00:00:00 Active
2 2013-05-10 00:00:00 2013-06-10 00:00:00 Expired
3 2012-08-01 00:00:00 2012-12-31 00:00:00 Expired
4 2013-07-10 00:00:00 2013-07-30 00:00:00 Inactive
But my Case query is too long, is there anyway to shorten the code or improve the performance?
How about the query:
Select
ID,
FromDate,
ToDate,
(case when convert(varchar(8),ToDate,112) <= convert(varchar(8),getdate(),112) then 'Expired'
when convert(varchar(8),getdate(),112) between convert(varchar(8),FromDate,112) and convert(varchar(8),ToDate,112) then 'Active'
when convert(varchar(8),FromDate,112) >= convert(varchar(8),getdate(),112) then 'Inactive' end )'Result'
from Date
Given ToDate is greater than FromDate.
SELECT ID, FromDate, ToDate,
CASE WHEN ToDateStr <= NowStr THEN 'Expired'
WHEN NowStr BETWEEN FromDateStr AND ToDateStr THEN 'Active'
ELSE 'Inactive' END AS Result
FROM (
SELECT
ID, FromDate, ToDate,
CONVERT(varchar(8),FromDate,112) AS FromDateStr,
CONVERT(varchar(8),ToDate,112) AS ToDateStr,
CONVERT(varchar(8),getdate(),112) AS NowStr
FROM Date) A
Given that the From date is always lower or equal than the To Date
select id, fromDate, toDate,
case
when daysFromStart > 0 AND daysToEnd > 0 then 'Active'
when daysFromStart > 0 AND daysToEnd < 0 then 'Expired'
when daysFromStart < 0 AND daysToEnd > 0 then 'Inactive'
end
from
(
select
id, fromDate, toDate,
DATEDIFF(day, fromDate, getdate()) as daysFromStart,
DATEDIFF(day, getdate(), toDate) as daysToEnd
from orders
) t
SQL fiddle
I m working on a very weird problem with SQL where I have to compare previous rows
Number start_date end_date
----- ------- ------------
1 2011-06-07 00:00:00.000 2011-07-10 00:00:00.000
2 2011-10-11 00:00:00.000 2011-10-11 00:00:00.000
3 2011-10-26 00:00:00.000 2011-10-29 00:00:00.000
4 2011-10-29 00:00:00.000 2011-11-15 00:00:00.000
Here , I have to compare the start_date and end_date on the two different line and create a view out of it.
(If the start_date is less than the previous end_date , then criteria is set to 1).
Well it should compare 2011-10-26 00:00:00.000 for 3 and 2011-10-27 00:00:00.000 on 2 for 30 days
Number start_date end_date Criteria
----- ----------- ---------------- ------------
1 2011-06-07 00:00:00.000 2011-07-10 00:00:00.000 0
2 2011-10-11 00:00:00.000 2011-10-11 00:00:00.000 0
3 2011-10-26 00:00:00.000 2011-10-29 00:00:00.000 1
4 2011-10-30 00:00:00.000 2011-11-15 00:00:00.000 1
I m confused how should I proceed with this.
Any help would be helpful !!!!
Thanks !!!
The most straightforward way to do this is to use a subquery:
select A.number, a.start_date, a.end_date,
CASE WHEN start_date < dateadd(d,30,(select TOP(1) b.end_date
from mytable B
where B.number < A.number
order by B.number desc)) then 1 else 0 end Criteria
from mytable A
Note: If the start date is the 29th day following the previous row's end date, Criteria becomes 1. By the 30th day onwards, it is 0. Tweak the 30 in the query as required.
Sample:
create table mytable (
Number int primary key,
start_date datetime,
end_date datetime);
insert mytable
select 1, '2011-06-07', '2011-07-10' union all
select 2, '2011-10-11', '2011-10-27' union all
select 3, '2011-10-26', '2011-10-29' union all
select 4, '2011-10-29', '2011-11-15'
Result:
number start_date end_date Criteria
1 2011-06-07 00:00:00.000 2011-07-10 00:00:00.000 0
2 2011-10-11 00:00:00.000 2011-10-27 00:00:00.000 0
3 2011-10-26 00:00:00.000 2011-10-29 00:00:00.000 1
4 2011-10-29 00:00:00.000 2011-11-15 00:00:00.000 0
Try using case like this:
create view vDates as
select Number,start_date,end_date,
case
when start_date<end_date
then 0
else 1
end as Criteria
from tab
SQL Fiddle Demo
A more readable way is create a function and send the correct dates:
Function:
create function [dbo].[CompareDates] (
#START_DATE datetime,
#PREVIOUS_END_DATE datetime
)
RETURNS int
AS
BEGIN
if #START_DATE < #PREVIOUS_END_DATE
return 1
return 0
END
Query (using subquery):
declare #dates table
(
number int,
start datetime,
end_date datetime
)
insert into #dates values
(1, '2011-06-07 00:00:00.000', '2011-07-10 00:00:00.000'),
(2, '2011-10-11 00:00:00.000', '2011-10-27 00:00:00.000'),
(3, '2011-10-26 00:00:00.000', '2011-10-29 00:00:00.000'),
(4, '2011-10-29 00:00:00.000', '2011-11-15 00:00:00.000')
select *, dbo.CompareDates(dates.end_date, dates.previous_end_date) from
(
select number, start, end_date,
(select TOP 1 end_date
from #dates d2
where d2.number < d1.number
order by d2.number desc) as previous_end_date
from #dates d1
) dates