T-SQL (SS2K8) :: Merging Non Overlapping Timedates
Sep 17, 2014
Using SQL 2008 R2 and stuck on this.
I have several sets of timedate ranges and I need to merge the ranges where there is no overlap with the jobs on resource1. In my example data, I want all jobs from ResourceID 1 and those jobs from all other resources where they do not overlap with EXISTING jobs on resource 1 (i.e. imagine I'm trying to select candidates from other resources to fill ResourceID 1 with continuous jobs)
Below is some sample data, my failed attempt and expected results. I managed to excluded everything that should be excluded except job 10
-- Need to select all other jobs from all other resources that can be merged into resource 1 where there is no overlap with existing jobs in resource 1 only
CREATE TABLE #Jobs
(
resourceID INT
,JobNo INT
,StartTime SMALLDATETIME
,EndTime SMALLDATETIME
,ShouldBeOmitted BIT
[Code] ....
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Oct 13, 2014
I want to count persons for non overlapping intervalls by room number. Here the data:
SET DATEFORMAT mdy;
DECLARE @PersonTime TABLE
(
ID INT,
Person INT,
Room INT,
Coming DATETIME,
Going DATETIME
[code]....
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Apr 21, 2014
We have a data warehouse staging database in which we capture change history for hundreds of tables from a source system. In the source system, records are updated in place, but in our data warehouse we capture these changes by "terminating" the existing record and adding a new record reflecting the changes. In the data warehouse we add two columns to every table -- effective_date and expiration_date -- which indicate the dates the record was in effect in the source system. By convention, an expiration_date of 6/6/2079 means the record is currently still active in the source system. Each day we simply compare yesterday's version of the record (in the data warehouse) against today's version (in the source system). If differences are found in any of the columns, we terminate the record and add a new one, setting those dates appropriately.
In this example, the employee_id column is the natural key in the source system. We add the effective_date and expiration_date in the data warehouse, so those three columns together make up the key in the data warehouse. The employee_name, employee_dept, and last_login_date columns all come from the source system as well.
drop table mytbl
create table mytbl (
effective_date smalldatetime,
expiration_date smalldatetime,
employee_id int,
employee_name varchar(30),
[code]....
In the select output, you can follow the trail of changes for each of these three employees. Bob moved from dept 7 to 8 at some point; Frank didn't change departments at all; Cheryl moved from dept 6 to 9 and later back to 6. However, the last_login_date was updated frequently for all these employees.
We've tracked hundreds of tables this way for years, some with hundreds of columns. For optimization purposes, I'm now interested in trimming the fat a bit. That is, we track changes in many columns that we don't really need in our data warehouse. Some of these columns are rapidly-changing, causing all sorts of unnecessary terminate/inserts in the data warehouse. My goal is to remove these columns, reclaim the disk space and increase the ETL speed. So in this example, let's get rid of the last_login_date column.
alter table mytbl
drop column last_login_date
select *
from mytbl
order by employee_id, effective_date
Now in the select output, you can see we have many "effective duplicate" records. For example, nothing changed for Bob between 1/1/2014 and 1/31/2014 -- those really should be one record, not three. Here's the challenge: I'm looking for an efficient way to merge these "effective duplicates" together, through set-based sql updates/deletes/inserts (hoping to avoid any RBAR operations). Here's what the table ultimately should look like (cheating to get there):
create table mytbl2 (
effective_date smalldatetime,
expiration_date smalldatetime,
employee_id int,
employee_name varchar(30),
employee_dept int
[code]...
Note that Bob only has two records (he changed department), Frank only has one record (no changes), and Cheryl has three records (two department changes).
My inclination would be to drop the unwanted columns, then GROUP BY all the remaining columns from the source system, and taking the MIN effective_date and MAX expiration_date. However, this doesn't work for cases like Cheryl's -- she moved to another department, then back again, so that change history needs to be retained.
As I mentioned, we have hundreds of tables, and I'd like to strip out dozens (maybe hundreds) of unused columns, so ultimately there will be millions of these pseudo-duplicates that need to be merged together. These are huge tables, so I really need to find an efficient set-based approach to this.
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May 19, 2014
How to merge the data from one database to another if we have identity column on both the database. If we are merging two companies,we need employee table of 2 database and insert them into first database and corresponding fkey tables say some 7 tables.how to merge if the table is having identity column.
DatabaseA has 7 Tables
Namely T1,T2,....T7
DatabaseB has 7 Tables
Namely T1,T2,....T7
T1 is master
T2 is Child
DatabaseA
T1
|
----------------
| |
T2 T3
| |
----------------- ---------------
|| | |
T4T5 T6 T7
DatabaseB
T1
|
----------------
| |
T2 T3
| |
----------------- ---------------
|| | |
T4T5 T6 T7
All the tables have interrelationship as shown pkey and Fkey
All the T1...T7 have Pkey with identity column starting from 1 and corresponding Fkey column in their child tables
Database A Table information Rows
T1-10000
T2-5000
T3-5000
T4-5000
T5-5000
T6-5000
T7-5000
Database B Table information Rows
T1-20000
T2-10000
T3-10000
T4-10000
T5-10000
T6-10000
T7-10000
Now i want to merge all the data from Database B to DatabaseA
How can i merge since in DatabaseA id for T1 starts from 1,2,3,4...and so on...
DatabaseB id for T1 also starts from 1,2,3,4...and so on...
and the fkey tables also have same 1,2,3,4...and so on... with reference of parent table
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Jul 10, 2014
I'm having issues building a cte sql statement for merging intervals. I have a table with data as follows:
declare @table table
(
startpoint int,
stoppoint int,
value int
[Code] ....
The resulting query returns the rows in the table, sorted by startpoint:
startpoint stoppoint value
----------- ----------- -----------
0 10 1
10 15 1
15 25 2
25 30 2
30 40 2
40 55 3
55 60 3
60 80 2
I'm looking for a merge cte that returns consecutive intervals with the same value, as follows:
startpoint stoppoint value
----------- ----------- -----------
0 15 1
15 40 2
40 60 3
60 80 2
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Apr 24, 2007
I have the following table structure
CREATE TABLE [dbo].[QDisc](
[Id] [int] NOT NULL,
[MinVal] [int] NOT NULL,
[MaxVal] [int] NOT NULL,
[PerVal] [int] NOT NULL,
CONSTRAINT [PK_QDisc] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
I need to be able to select unique overlapping sets of data based on the minval and maxval.
Simple Example
minval maxval
5 15
16 25
10 20
query would produce
minval maxval
5 10
11 15
16 20
21 25
More Complex example
minval maxval
5 15
16 25
10 20
7 7
1 100
query would produce
minval maxval
1 5
6 6
7 7
8 10
11 15
16 20
21 25
26 100
Extra points if anyone can do this without SP and cursor but I'd be satisfied if someone supplied it that way.
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Oct 4, 2006
i have a table containing following dataeffdate termdate uid----------- ----------- -----------1 2 13 4 25 8 37 9 411 12 512 13 63 6 75 9 8i need to replace all the overlapping records with one recordsuch that resultant table shud look likeeffdate termdate uid1 2 111 13 23 9 3Thanks
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Aug 28, 2006
I have a table with following fields
CURRENT_DAY FROM_DATE TO_DATE
1 1899-12-20 09:00:00.000 1899-12-20 10:00:00.000
1 1899-12-20 09:50:00.000 1899-12-20 11:00:00.000
1 1899-12-20 12:00:00.000 1899-12-20 02:00:00.000
I need the count of records that overlap with each other. [OR]
1 if there is overlap, 0 if there is no overlap.
I am new to sql, thanks for any help.
Yog
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Feb 7, 2000
I have 3 seperate jobs to backup my database. 1 for a full backup, 1 for differentials, and the 3rd for the transaction log. Each is on its own schedule. The problem I have is that sometimes the transaction log job will try to start while one of the other two are in process. When this happens, an error is generated and I get paged (which is very anoying at midnight) Is there any way to block the transaction job until the other two are complete? It should still run, just not at the same time.
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Jul 26, 2004
:confused: Dont know if this will be tough for the rest of you but for someone who is fairly new to SQL...I cannot figure it out...
I have a table:
Rownumber starttime endtime
1 l 30 l 240
2 l 40 l 120
3 l 50 l 260
4 l 1300 l 1400
Rows 1, 2, and 3 over lap with one another and I am trying to obtain the starttime and endtime values which can cover them all.
I would like to find the overlapping (starttime - endtime) ranges and accept the lowest starttime value and the highest endtime value.
Row 1: 30--------------------240
Row 2: 40--------------120
Row 3: 50----------------------260
Row 4: ...1300---------1440
I would like to include starttime-endtime ranges that do not overlap with any other integer range.
which in this case would be:
Rownumber starttime endtime
1 l 30 l 260
2 l 1330 l 1400
I was thinking of using a cursor and comparing each row to all of the other rows in the table and then setting a boolean in that row if it overlaps with another row in the table...is there a better way of doing this?
Thank you for the help!
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Oct 25, 2005
I've gone cold here. Dunno if I've had too little coffee - as I'm currently drinking some seriously wicked green tea - or whether my brain has locked down from yesterdays "bad eggs for lunch" experience.
Anyway... I have database with a customer, for each customer is a related history table with assigned consultant.
The assigned consultant table has information on consultant id, name, the start date of his assignment and the end date.
I need to find all customers that currently have (or have had) two or more consultants actively assigned. In other words, I need to see if the start/end times overlap.
At my current state, I'm just done.. i can't maintain the perspective... how do I do this?
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Apr 9, 2008
Hello,
How can I create a query that pulls all records for a given ID (road) where the distances (based on start & end fields) overlap?
Eg. RoadNm Start End
Road 1 0 500
Road 1 300 800
Road 2 0 500
Road 2 500 800
I need to write SQL that flags Road 1 as a road with overlapping sections (whereas Road 2 is fine).
Thanks!
Amber
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May 7, 2008
Hey
I am trying to create a report where I want overlapping images and rectangles... but when I upload it to report manager it seems to push them all seperate??? How do I stop doinh this... it does print okay! Just looks wrong on screen?
Thanks
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Apr 17, 2007
Hello Everyone,
I have a web form that allows the user to select a time to reserve. I am trying to make it so that when a user selects a date to schedule something (which i have working) a drop down list will fill with times that have not been reserved.
The data is stored in two tables: tblCalendar and tblTime. tblTime contains pkTimeID and times (which are all possible times to select from in half hour intervals). tblCalendar contains a few fields but timeID and date (which is in the format M/d/yyyy) are what I need to test against. timeID is the foreign key of pkTimeID.
Basically when the user selects the date, a function gets called that will run a SELECT statement to get the times available. All of this works, I am able to fill the ddl with all times available no matter what the date is or what has already been reserved. I want to check if a time has been already selected based on the date selected by the user and only allow times not selected to be listed.
After acheiving this I would like to prevent the immediate time before and immediate time after from being displayed because each reserved time will last for one hour but the data is stored in half hour increments.
Any help/suggestions/links will be greatly appreciated. If I need to provide anything else please let me know.
Thanks in advance,
Brian
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Nov 9, 2006
hi guys,
i have a booking table which has the following columns...
booking
-------------------------------------------
dCheckin (format 11/9/2006 12:00:00 AM)
dCheckout (format 11/11/2006 12:00:00 AM)
when a new booking is entered, we want to make sure that the period entered does not conflict with an existing record.
not sure how to go about building the query required. any help would be greatly appreciated.
mike
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Jun 5, 2008
ok folks, I need help.
Here's the table and some sample data:
declare @t table
(
segment int,
subsegment int,
primary key (segment,subsegment)
)
insert @t
select 1,33 union all
select 1,22 union all
select 2,33 union all
select 2,22 union all
select 3,33 union all
select 3,22 union all
select 3,44
What I want is to find all segments that are in some sense complete duplicates of other segments. a segment is made up of subsegments. a subsegment is not a segment - it's a completely different entity. this table is not hierarchical.
So in the sample data above, segments 1 and 2 are dupes because they share exactly the same subsegments: 22 and 33. Segment 3 is not a dupe because it has a third subsegment the other two don't have: 44.
when a duped segment is found, I need to know which other segment it duplicates. so an acceptable result set for the above sample data would be:
segment partner
------- -------
1 2
this would also be fine:
segment partner
------- -------
1 2
2 1
ps: i already posted this on dbforums - just broadening the audience a little.
elsasoft.org
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Jul 20, 2005
All,I have a table with start and end dates/times in it, and would like tobe able to calculate the number of hours represented, accounting foroverlapping records.Note that I am looking for an answer on HOW to do this--I don'tnecessarily need it to be written for me (although it would not gounappreciated!).CREATE TABLE [dbo].[session_temp] ([session_pk] [int] IDENTITY (1, 1) NOT NULL ,[date_start] [smalldatetime] NULL ,[date_end] [smalldatetime] NULL) ON [PRIMARY]GO--These values make a very simplistic example,--as they only represent one--session,so using min and max would work in this case,--but would not work if there--were multiple sessions involved.--hopefully you get the idea of what I am going for:INSERT INTO session_tempVALUES('4/4/04 9 pm','4/4/04 10pm')INSERT INTO session_tempVALUES('4/4/04 9 pm','4/4/04 10:30pm')INSERT INTO session_tempVALUES('4/4/04 9 pm','4/4/04 10:45pm')INSERT INTO session_tempVALUES('4/4/04 9 pm','4/4/04 11pm')INSERT INTO session_tempVALUES('4/4/04 9 pm','4/5/04 2am')--the query I am looking to write would return "5"--the one below obviously does not do what I am looking forSELECTSUM(CAST(DATEDIFF(ss,date_start,date_end) AS NUMERIC(8,2))/3600)FROMsession_tempThanks very much for any insight.Phil---Check out my poker-only weblog at:http://www.livejournal.com/users/chicago_phil/Download my session-tracking spreadsheet at:http://www.geocities.com/fibby70/
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Oct 2, 2006
I am using Sql 2005 and merge replication with push subscriptions. I have several dynamic join filters on some of my tables.
The join filters all use a central table that maps say a server location name (something that is returned from HOTNAME() in my case) to an for a store branch ID. This is a retail system database.
When I add a new new subscription I update this table with the new server location name and it's corresponding branch ID. My filtered tables all have a foreign key in them that is the branch ID. I can then effectively join from the server location name to a Branch ID.
What I have noticed is that if I update one row in the map table, sql server will re-generate all partitioned rows for all subscribers, even for rows that haven't been updated.
The net result is that when I add a subscription, my existing subscriptions all get about 52,000 row updates.
Am I seeing this because I said my partitions will overlap when I created the table articles?
Thanks for any help
Graham
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Aug 20, 2007
Hi,
The firefox preview comes totally messed up.One line overlapping over the other
In my report i have a table in which a row has 5 text boxes.
the 3rd and 5th text box has can grow property set to true.
i have tried placing the text boxes into rectangles but no help there.
the text in that row still over laps .
does anyone have any other fix for this?
Somiya
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Oct 20, 2015
[URL] ...
So What I am trying to accomplish is sum up overlapping time ranges while also keeping Unique data rows within the table. So If a data row is unique meaning it is NOT within a overlapping group of data rows then I want to just insert it into a "final table", but if the data rows are overlapping then I want to grab the min(timestart) and the max(timestop) and the PKID of the data row with the max(timestop) within the overlapping group.
I accomplish this task using nested cursors, however When I place my method into a trigger which runs on INSERT, then my trigger never runs and nothing happens. Is there a way to accomplish this without using cursors. I have placed my cursor method into the sql fiddle to be inspected.
create table temp1
( pkid int,
line int,
dateentry date,
timestart time,
timestop time
)
[Code] ....
DESIRED RESULTS:
1060
1
2015-10-01
16:30:00
17:00:00
30
NULL
[Code] .....
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Sep 29, 2015
How can I check the overlapping in a simple table like:
Create table forum (cid int, bfrom date, tfrom date, fval int)
Insert into forum values (1, '2014-01-01', '2014-01-31',10),(2, '2014-01-01', '2014-01-31',12),(1, '2014-02-01', '2014-02-28',8),(2, '2014-02-01', '2014-02-28',6),(1, '2014-03-01', '2014-03-31',11),(2, '2014-03-01', '2014-03-31',5),(1, '2014-04-01',
'2014-04-30',14), (2, '2014-03-01', '2014-04-30',12)
In the example above there is an overlapping for the cid 2 in March. How can I check, which select should I apply?
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May 16, 2007
I have set the option 'Headers should remain Visible while scrolling', in order to freeze the headers. However, on some reports, when I scroll down the report , the headers overlap each other .
Any ideas why this would happen?
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Dec 2, 2005
... and preserving the relationships.(Note, this is more of a SQL question than a SQL-related ASP.NET question...)Say I have two databases, D1 and D2, with the same three tables:CompaniesDepartmentsEmployeesWith the standard one-to-many relationships down the line, with eachtable having a PK, IDENTITY field like CompanyID, DepartmentID, andEmployeeID.I have a smattering of data in each of D1 and D2 for these tables withoverlaps in the ID field values. What I want to be able to do is copyover D1's data to D2, preserving the relationships in D1 even thoughthere are ID overlaps in D2. So the tool I'd use would have to besmart enough to check for ID dups in D2 and appropriate change the IDvalues in D1's tables, maintaining the relationships.Is there some built-in SQL tool to do this or do I have to do this myself?Thanks!
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Apr 4, 2007
I'm new to sql. Can someone help me to write a script to select overlapping start dates for each client records.
For example:
Clientid 1 have 3 episode as below(I only want to see the first two records with overlapping start date records)
clientid StratDate EndDate
1 2004-01-01 2004-05-01
1 2004-04-01 2004-05-01
1 2005-04-01 2006-01-01
Table create
CREATE TABLE [dbo].[TABLE_TEST] (
[Client_ID] [varchar] (15) COLLATE Latin1_General_CI_AS NULL ,
[STARTDate] [datetime] NULL ,
[ENDDate] [datetime] NULL ,
)
GO
INSERT
INSERT INTO [TABLE_TEST]([Trust_Wide_ID], [STARTDate], [ENDDate])
VALUES('1','2004-01-01','2004-05-01')
INSERT INTO [TABLE_TEST]([Trust_Wide_ID], [STARTDate], [ENDDate])
VALUES('1','2004-04-01','2004-05-01')
INSERT INTO [TABLE_TEST]([Trust_Wide_ID], [STARTDate], [ENDDate])
VALUES('1','2005-04-01','2006-04-01')
INSERT INTO [TABLE_TEST]([Trust_Wide_ID], [STARTDate], [ENDDate])
VALUES('2','2004-06-01','2004-07-01')
INSERT INTO [TABLE_TEST]([Trust_Wide_ID], [STARTDate], [ENDDate])
VALUES('3','2004-09-01','2004-010-01')
Go
Thanks for help
Husman
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Oct 23, 2007
I need to identify time spans where members identified as having a condition have NOT had any of 5 specified services in the past 12 months. I have a table (DiabStrata) that identifies time frames for which my data shows a member as having the condition, and I have 5 separate tables with the dates of the relevant services.
I can easily identify when a member hasn't had the service at all, or is lacking it at the start or end of the time frame for which they have the condition, but I'm hitting a wall on how to deal with gaps between the minimum and maximum identification dates.
Code Block
create table dbo.DiabStrata(memberid char(11),Strat tinyint, StratStart datetime, StratEnd datetime)
create table dbo.hba1c(memberid char(11),dos datetime)
insert DiabStrata(
select '1',1,'20060101','20070302'
union
select '1',1,'20070803','20080804'
union
select '2',1,'20020101','20080503')
insert hba1c(
select '1','20060301'
union
select '1','20070301'
union
select '2','20050101')
--Missed Service
Begin
select * into #eval from DiabStrata where strat=1
delete #eval
from #eval left join hba1c on #eval.memberid=hba1c.memberid where hba1c.memberid is null
--repeat for other indicators
update e
set stratstart=min(dos)
from #eval e join hba1c on e.memberid=hba1c.memberid
having min(dos)>stratstart
update e
set stratend=max(dos)+365
from #eval e join hba1c on e.memberid=hba1c.memberid
having max(dos)+365<stratend
delete from #eval where stratstart>stratend
--repeat for other indicators
Desired output is into DiabStrata with a strat of 2 for the time frame for which they have strat 1 but do not have all 5 services within the prior 365 days.
MID Strat StartStrat EndStrat
1 2 1/1/06 - 2/28/06
1 2 3/2/08 - 8/4/08
2 2 1/1/02 - 12/31/04
2 2 1/2/06 - 5/3/08
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Oct 18, 2015
IF OBJECT_ID('tempdb..#OverLappingDates') IS NOT NULL
DROP TABLE #OverLappingDates
CREATE TABLE #OverLappingDates
(
MemberID Varchar (50),
ClaimID Varchar(50),
StartDate DateTime,
EndDate DateTime
)
[Code] ....
I need to select only records where dates are over lapping for the same memberid...For this scenario i need an output First 2 records (MemberID 1 has 2 claiims overlapping dates).
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Jul 8, 2015
how can I check the overlapping and the LostPeriod by chargeid?
create table #forum (contractid int, chargeid int, ByFrom date, ByTo date)
insert into #forum values ('7','18','2005-04-01','2007-03-31'), ('7','19','2008-06-01','2010-03-31'),
('7','20','2014-04-01','2015-06-01'),
('8','10','2003-10-01','2005-03-31'),('8','11','2006-12-01','2007-07-31'),
('9','11','2003-10-01','2005-03-31'),('9','12','2004-10-01','2015-03-31')
As lost period I mean that period that is not covered by any chargeid. By overlapping I mean having two or more charge id in the same period.
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Aug 18, 2015
I have a table with multiple rows per staff person. Each of these rows has staff_id, start_date, and end_date. Per staff, if any start_date comes between the start_date and end_date of a different row, or if any end_date comes between the start_date and end_date of a different row, then I have to flag these records as being identical.
How can I do this? I have tried doing a Cross Apply because I thought that would do Cartesian product (comparing every row), and I've also tried temp tables. But I haven't gotten either of these to work. Here is some dummy data:
if exists (select * from tempdb.dbo.sysobjects o where o.xtype in ('U') and o.id = object_id(N'tempdb..#staff_records')
) DROP TABLE #staff_records;
create table #staff_records
(
staff_id varchar(max),
[Code] ....
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May 14, 2007
Hi,
We have created a report chart, a simple bar graph, and need to put 2 vertical lines (target limits) on this chart, At the end we need to export this charts in excel and html, but it says that the overlapping of reports items is not supported in all renderers.
It seems that HTML and Excel donot support the overlapping of this 2 items.
Can anyone please help me in this issue? or is their any other alternative to get the chart and the static lines placed on this charts.
Regards,
Sumeet
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Oct 6, 2015
I am trying to create a check constraint that prevents entry of a date range that overlaps any other date range in the table. The below example script results in the error message: The INSERT statement conflicted with the CHECK constraint "ck_dt_overlap". what I am doing wrong?
CREATE TABLE t1 (d1 date,d2 date)
go
create function dbo.dt_overlap (@d1 date, @d2 date) RETURNS BIT
AS
BEGIN
IF EXISTS (SELECT 1 from t1 where d1 between @d1 and @d2 or d2 between @d1 and @d2)
RETURN 1
RETURN 0
END
go
alter table t1 add constraint ck_dt_overlap CHECK (dbo.dt_overlap(d1,d2)=0)
go
insert into t1 values ('2015-01-01','2015-02-01')
insert into t1 values ('2015-01-15','2015-02-15')
--BOTH inserts result in the following message: The INSERT statement conflicted with the CHECK constraint "ck_dt_overlap".
drop table t1
drop function dbo.dt_overlap
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Dec 2, 2015
This question is extension from the topic Updating table Rows with overlapping dates: [URL] .....
I am actually having a table as following:
Table Name: PromotionList
Note that the NULL in endDate means no end date or infinite end date.
ID PromotionID StartDate EndDate Flag
1 1 2015-04-05 2015-05-28 0
2 1 2015-04-23 NULL 0
3 2 2015-03-03 2015-05-04 0
4 1 2015-04-23 2015-05-29 0
5 1 2015-01-01 2015-02-02 0
And I would like to produce the following outcome to the same table (using update statement): As what you all observe, it merge all overlapping dates based on same promotion ID by taking the minimum start date and maximum end date. Only the first row of overlapping date is updated to the desired value and the flag value change to 1. For other overlapping value, it will be set to NULL and the flag becomes 2.
Flag = 1, success merge row. Flag = 2, fail row
ID PromotionID StartDate EndDate Flag
1 1 2015-04-05 NULL 1
2 1 NULL NULL 2
3 2 2015-03-03 2015-05-04 1
4 1 NULL NULL 2
5 1 2015-01-01 2015-02-02 1
The second part that I would like to acheive is based on the first table as well. However, this time I would like to merge the date which results in the minimum start date and End Date of the last overlapping rows. Since the End date of the last overlapping rows of promotion ID 1 is row with ID 4 with End Date 2015-05-29, the table will result as follow after update.
ID PromotionID StartDate EndDate Flag
1 1 2015-04-05 2015-05-29 1
2 1 NULL NULL 2
3 2 2015-03-03 2015-05-04 1
4 1 NULL NULL 2
5 1 2015-01-01 2015-02-02 1
Note that above is just sample Data. Actual data might contain thousands of records and hopefully it can be done in single update statement.
Extending from the above question, now two extra columns has been added to the table, which is ShouldDelete and PromotionCategoryID respectively.
Original table:
ID PromotionID StartDate EndDate Flag ShouldDelete PromotionCategoryID
1 1 2015-04-05 2015-05-28 0 Y 1
2 1 2015-04-23 2015-05-29 0 NULL NULL
3 2 2015-03-03 2015-05-04 0 N NULL
4 1 2015-04-23 NULL 0 Y 1
5 1 2015-01-01 2015-02-02 0 NULL NULL
Should Delete can take Y, N and NULL
PromotionCategoryID can take any integer and NULL
Now it should be partition according with promotionid, shoulddelete and promotioncategoryID (these 3 should be same).
By taking the min date and max date of the same group, the following table should be achieve after the table is updated.
Final outcome:
ID PromotionID StartDate EndDate Flag ShouldDelete PromotionCategoryID
1 1 2015-04-05 NULL 1 Y 1
2 1 2015-04-23 2015-05-29 1 NULL NULL
3 2 2015-03-03 2015-05-04 1 N NULL
4 1 NULL NULL 2 Y 1
5 1 2015-01-01 2015-02-02 1 NULL NULL
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May 12, 2015
Given the data below, I have a couple needs:
1) Query to determine if any date ranges overlap (regardless of category, e.g., row ids 6 & 7 below)
2) Query to determine if any date ranges of the same category overlap
declare @t1 table (id int primary key, category int, start_date datetime, end_date datetime)
insert @t1 select 1, 1, '1/1/2015 12:00:00 AM', '1/15/2015 12:59:59 PM'
insert @t1 select 2, 1, '1/16/2015 12:00:00 AM', '1/31/2015 12:59:59 PM'
insert @t1 select 3, 1, '2/1/2015 12:00:00 AM', '2/15/2015 12:59:59 PM'
insert @t1 select 4, 1, '2/16/2015 12:00:00 AM', '2/28/2015 12:59:59 PM'
insert @t1 select 5, 1, '3/1/2015 12:00:00 AM', '3/15/2015 12:59:59 PM'
[code]....
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Apr 19, 2007
hello
im working on a project with a friend and store source files in a subversion server. since we are both working on the same DB everytime one of us makes a change we discover a problem in merging our changes.
is there any tool that can help in merging and making diff??
is there any alternativa?
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