Locating Set Of Points Close To One Another (within A Threshold)
May 6, 2006
Hi all
I have a large data set of points situated in 3d space. I have a simple
primary key and an x, y and z value.
What I would like is an efficient method for finding the group of
points within a threshold.
So far I have tested the following however it is very slow.
---------------
select *
from locations a full outer join locations b
on a.ID < b.ID and a.X-b.X<2 and a.Y-b.Y<2 and a.Z-b.Z<2
where a.ID is not null and b.ID is not null
---------------
If anyone knows of a more efficient method to arrive at this results it
would be most appreciated.
Greetings everyone, I'm posting this thread with the hope that someone will notice it and might offer me a helping hand regarding one of my problems.I have the database named "DBEXAMPLE" with the table MEMB_INFO that contains two important columns that are named cur_points and points where cur_points column contains the total available points that a member can use/spend on a game and the points column stores the total of the points that a member used so far.So as i plan to wipe all data of the database, i need to keep the member login,password and total points that each member purchased.So i will somehow need to update the cur_points column with the total of current cur_points+points columns and then wipe points column.I've personally asked a friend regarding this and he said that this should be something complicated and it might require php also.Really appreciate if someone could help me regarding this.small schema:Database: DBEXAMPLETable: MEMB_INFOColumn cur_points -> total available points that a member can spendColumn points -> total points that the member has already spentColumn memb___id -> member login aka account idTODO -> update cur_points column with the total of cur_points+points columns for each member(buyer)With best regards.
is there any threshold manager in the ms sql server? like in the transaction log, where you can add a stored proc that will dump the tran log everytime a threshold is hit.
I have a table with 188376 rows and the data size = 3012 KB, index size = 5884 KB . LE threshold max is set to 2000 and LE threshol percent to 20% I have an index on that table and observed that it is not getting used. I would like to know whether sql optimizer uses the index based on the cost of the query plan or does the table scan once the LE thresholdlimit is reached overriding the optimized plan.
Guys I am really stuck on this one. Any help or suggestions would beappreciated.We have a large table which seemed to just hit some kind of threshold.They query is somewhat responsive when there are NO indexes on thetable. However, when we index email the query takes forever.FACTS- The problem is very "data specific". I can not recreate theproblem using different data.- There is only a problem when I index email on the base table.- The problem goes away when I add "AND b.email IS NOT NULL" to theinner join condition. It does not help when I add the logic to the"WHERE" clause.DDLCREATE TABLE base (bk char(25), email varchar(100))create clustered index icx on base(bk)create index ix_email on base(email)CREATE TABLE filter (bk char(25), email varchar(100))create clustered index icx on filter (bk)create index ix_email on filter (email)QuerySELECT b.bk, b.emailFROM base b WITH(NOLOCK)INNER JOIN filter f ON f.email = b.email--and f.email is not nullData Profile--35120500, 35120491, 14221553SELECT COUNT(*) ,COUNT(DISTINCT bk), COUNT(DISTINCT email)FROM base--16796199, 16796192, 14221553SELECT COUNT(*) ,COUNT(DISTINCT bk), COUNT(DISTINCT email)FROM baseWHERE email IS NOT NULL--250552, 250552, 250205SELECT COUNT(*) ,COUNT(DISTINCT bk), COUNT(DISTINCT email)FROM filter--250208, 250208, 250205SELECT COUNT(*) ,COUNT(DISTINCT bk), COUNT(DISTINCT email)FROM filterWHERE email IS NOT NULL
I am doing workload analysis on SSAS - Tabular (2012), I have perfmon logs captured and want to run through PAL. I am looking out for threshold file for SSAS tabular 2012/2014.
The below stored procedure is used to create a vertical benchmark line on the X-Axis which has a hour scale. I use the stored procedure to find out which temperature crosses or equals the threshold temperature (340), then plot the vertical benchmark line at the hour the first temperature is equal to or greater than 340 degrees and less than 1000 degrees.
The logic below works if the temperature is equal to or greater than 340 degrees and less than 1000 degrees. THE ISSUE is I have 8 temperatures if they don't cross the threshold of 340 degrees I need to set a default value for my vertical line. In other words if the temperature is 180 and my threshold is 340 then set my vertical line on the highest temperature close to 340.
I tried removing my Where clause (but then it breaks the logic for those temperatures that are equal to or greater than 340). I tried using Case When but this didn't give me what I want either. I tried UNION as well. All giving me results I don't want.
Here is what I am looking for:
This first example is one where there was a temperature that was equal to or greater than the threshold of 340 degrees. This is CORRECT
If 8 temperatures did not equal or cross the threshold then give me the hour of the highest temperature close to the threshold but do not return 0.
For Example:
temp1 92 temp2 108 temp3 0 temp4 284 <<< this is the closest to the threshold so give me the hour when this occurred. temp5 2192 *Remember I can only count temperatures less than 1000 degrees. Anything above 1000 degrees mean there is nothing in the oven. So it is false/positive. temp6 102 temp7 0 temp8 12
Code: CREATE PROCEDURE [dbo].[AgeScoreCardThreshold_JJ_12232013] -- Add the parameters for the stored procedure here @LicenseNumber int = NULL, @Lot varchar(50) = NULL
According to BOL you can configure an Alert to notify you when the blocked process threshold has been exceeded:
SQL Server 2005 Books Online
blocked process threshold Option
Use the blocked process threshold option to specify the threshold, in seconds, at which blocked process reports are generated. The threshold can be set from 0 to 86,400. By default, no blocked process reports are produced. This event is not generated for system tasks or for tasks that are waiting on resources that do not generate detectable deadlocks. For more information about deadlock detection, see Detecting and Ending Deadlocks.
You can define an alert to be executed when this event is generated. So for example, you can choose to page the administrator to take appropriate action to handle the blocking situation.
Can someone provide some direction on exactly how this is done? Does it require a Service Broker and queue?
Referencing an article regarding MAXDOP and cost threshold for parallelism from Brent Ozar's website: [URL] .....
We have a 2 physical CPUs that are 4 cores each with hyper threading enabled. When looking through the task manager, under the performance tab, I see 16 CPU threads.We have set the MAXDOP value is set at 4.
Reading further, cost threshold for parallelism setting is recommended at 50 to start with.
I have a table that is made up of the sum of medical, mental health and pharmacy claims. I would like to query that to find instances when the sum of the three claims types are greater than a predetermined threshold.
For example: Patient 1 Medical = 10,000 (could be 10 records at 1,000 each) Patient 1 Mental Health = 5,000 Patient 1 Pharmacy = 15,000 Patient 2 Medical = 1,000 Patient 2 Mental Health = 0 Patient 2 Pharmacy = 500
Threshold is 25,000
If I queried the above sample table I would get one record: Patient 1 30,000 - because 10,000+5,000+15,000 = 30,000 and is greater than the threshold.
I am not sure that a having clause would work though.
I am trying to script a case when to achieve the following.
I have a table of measures with certain threshold. The threshold direction can either be > or < so I want to create a field that shows if the measure hits that threshold or not to be later picked up in SSRS. So a nested case when?
CASE WHEN M.[Threshold Direction] = '>' THEN CASE WHEN A.[Value] > M.[Threshold] THEN 'GREEN' CASE WHEN A.[Value] < M.[Threshold] THEN 'RED' ELSE '' END END END AS 'Condition'Is this at all possible?
I recently uploaded my site to the internet. But now, when I try to to log in, I receive the following error message: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) How do I fix this?
I know how to create mount point in windows 20003 cluster, I am not sure how to set it up with SQL 2005 running on the cluster. Does sql need to be dependant on any of the disks? I have tried looking for a guide, but cannot find.
current setup active active cluster running. I need to add san space which will hold the databases. The san will be carved up into drive letters. each drive letter will hold 3 mount points. ie. node 1 J:-2 mount point k:2 mount point l:2 mount point
node 2- r:-2 mount point s:2 mount point t:2 mount point
each node would be able to own the disk if the other node failed over.
any help is appreciate. I have tried books online etc.. cannot find a good step by step.;
HI All, I use MSSQL as my database and ASP.NET as my front application. I want to display Price value S$23.68. The dayatype I used is smallmoney, but it display: S$23.6800. HOw do I control the number of decimals point in the column of MSSQL?? Thanks a lot Suigion
ManagerID, ManagerID2, ManagerID3, ManagerID4 are all pointing to EmployeeID in the same table.
Now I want to select the all employee records where the manager NAME is like '%Raymond%'. (i.e. any of the four managers name is like '%Raymond%'.
How do I construct the select query? I tried this, but it does not work if there are more than 1 manager named 'Raymond'
DECLARE @Name varchar(50) SET @Name = '%Raymond%'
DECLARE @EmployeeNumber nvarchar(50) Select @EmployeeNumber = EmployeeID from Employee where [Name] like @Name
SELECT 'HumanResources.Employee' as TableName, E.[Name] as EmployeeName , isnull((Select [Name] from Employee E2 where E2.EmployeeID = E.ManagerID),'') as Manager1, isnull((Select [Name] from Employee E2 where E2.EmployeeID = E.ManagerID2),'') as Manager2, isnull((Select [Name] from Employee E2 where E2.EmployeeID = E.ManagerID3),'') as AppraisingManager, isnull((Select [Name] from Employee E2 where E2.EmployeeID = E.ManagerID4),'') as ModeratingManager, E.CurrentFlag as Active FROM HumanResources.Employee E
WHERE (E.[ManagerID] = @EmployeeNumber) or (E.[ManagerID2] = @EmployeeNumber) or (E.[AppraisingManagerID] = @EmployeeNumber) or (E.[ModeratingManagerID] = @EmployeeNumber))
I understand mount points help scalability in easier maintenance. By scalability do we mean more than 26 drive letters or it means adding more space to the same mount point letter on with more ease .
Can I add more space to a mountpoint if required later on by adding hard disks .
Also if one can give some pointers to good file group configuration guidelines / storage align partitions , it will be very much helpful
Further I my server CPU has 4 cores , will having 4 filegroups help me in improving system performance.
If SAN has 2 controllers , is it preferred to run data file partition on one controller and log file partition on another.
Hello, We have a requirement to be able to monitor mount points. The xp_fixeddrives does not support mount point monitoring. Is there another way to do it. Does microsoft working on updating the xp_fixeddrives. Let me know if anyone has any ideas how to monitor mount points.
"Msg 2510, Level 16, State 1, Server SRVSQL1111, Line 1 Table Corrupt: Keys do not match between leaf page 53686 and data page 53940; check row # 19 on the data page"
Could anyone please tell me how I can locate the corrupted object?
I've just started with a company that had a web developer in to set up their site. She set it up with Coldfusion and MS SQL Server, uploaded the whole thing to their provider, then disappeared. Then the whole thing got dumped in my lap, and I'm pretty new to both SQL Server and Coldfusion.
My first question is, how can I access the SQL Server database online? It's somewhere on the web host's site, and I have the name of it and the password, but I have no clue how I'm supposed to get a look at the thing. Is there a file I should be able to find? Can anyone provide a clue?
I have created my sqlexpress database in Visual Studio 2005. When i go to SQL Server Management Studio Express I cannot open my database. It is not listed automatically and I get an error 'There is no editor for 'database name' Make sure the application for file type (.mdf) if installed.'
Hi,I'm making a rating system that save the results in the database.I have 1 table with 3 columns:1) name2) points3) numberofvotesnow I want to select the 5 names with the best results. In other words the 5 best results when you do (points/numberofvotes)how can I say this in SQL? I hope someone can help me! thnx!
Previously I have posted about my problem with transaction logs. Threw my research I have found the truncate log at check point. I have also been lead to think that a check point could be a full back up. I have set this option to true and then performed a full back up. Afterward I have shrank the database to find the transaction log to still be over 43 gigs. Where have I gone astray?
Hi all, I'm trying to debug storedprocedures in query analyzer from workstation, login with server adminuser.Debugger is not stoping at break points. any help regarding this will be greatly appreciated. thanks.
DECLARE @EffLevels TABLE (ChangePoint int, Value Int)
INSERT@EffLevels SELECT'1000', '767' UNION ALL--Changed SELECT'1000', '675' UNION ALL SELECT'1001', '600' UNION ALL--Changed SELECT'1001', '545' UNION ALL SELECT'1001', '765' UNION ALL SELECT'1000', '673' UNION ALL--Changed SELECT'1002', '343' UNION ALL--Changed SELECT'1002', '413' UNION ALL SELECT'1002', '334' UNION ALL SELECT'1001', '823'--Changed
-- My Result should be -- ChangePointPrevChangePointValue -- 1000Null767 -- 1001 1000 675 -- 1000 1001 765 -- 1002 1000 343 -- 1001 1002 823
