Hello!
I'm trying to improve some queries. I write the query, run it, register how long it took to return the data, twick a little and run it again. Problem: There is some kind of caching going on which render the second iteration useless in terms of time comparison. Is there any way to disable this caching mechanism, temporarily, obviously?
Thanks for your help.
J.C.
I am not sure this is the right forum for this question, but I would appreciate any pointers towards more appropriate forums.
I am attempting to replicate the data browsing performance of Microsoft's QA/SSMS in my own application. Even for very large datasets, one can typically scroll through a few hundred thousands rows without a problem. For queries this large, a generic DataGridView setup would take forever. Digging around using Process Explorer, I saw that QA/SSMS was loading the results into a (what I presume to be a memory-mapped) temporary file, which it used to cache the results for display.
Is there an example of how this is being done? I am assuming it is using unmanaged code, as I am not aware of any interfaces to memory mapped files in .NET. I don't have much experience here, so I would appreciate any help. Thanks.
I needed to do lookup on tables with approx 1 million records (how else do I know if record already exists?).
View 7 Replies View RelatedHi all I'm using Sql server 2000 and sometimes i need to run my Queries in Query analizer before using them in my application just to test them...BUT most of the time when i run a query in query-analizer for second time ,query analizer populates the result (records) more quicker then the first time. Apparently it caches the query !!! i don't know but for some reasons i dont't want this , so how can i prevent Query-analizer from doing so?
Thanks in advance. Regards.
hi, like, if i need to do delete some items with the id = 10000 then also need to update on the remaining items on the with the same idthen i will need to go through all the records to fetch the items with the same id right? so, is there something that i can use to hold those records so that i can do the delete and update just on those records and don't need to query twice? or is there a way to do that in one go ?thanks in advance!
View 1 Replies View RelatedHello. I currently have a website that has a table on one webpage. When a record is clicked, the primary key of that record is transfered in the query string to another page and fed into an sql statement. In this case its selecting a project on the first page, and displaying all the scripts for that project on another page. I also have an additional dropdownlist on the second page that i use to filter the scripts by an attribute called 'testdomain'. At present this works to an extent. When i click a project, i am navigated to the scripts page which is empty except for the dropdownlist. i then select a 'testdomain' from the dropdownlist and the page populates with scripts (formview) for the particular test domain. what i would like is for all the scripts to be displayed using the formview in the first instance when the user arrives at the second page. from there, they can then filter the scripts using the dropdownlist.
My current SQL statement is as follows.
SelectCommand="SELECT * FROM [TestScript] WHERE (([ProjectID] = @ProjectID) AND ([TestDomain] = @TestDomain))"
So what is happening is when testdomain = a null value, it does not select any scripts. Is there a way i can achieve the behaivour of the page as i outlined above? Any help would be appreciated.
Thanks,
James.
Hello,
I need to disable query cache in MS SQL Server 2005 Express. How can i do it?
My application can opertate ~2K records per sec (INSERT).
A million records costa me extra 142 Mb of RAM.
It means that sql server will take exrta 1Gb of RAM every hour.
I can't afford that.
Can anyone please help me?
I have to disable update, delete and insert commands in my sql query analyser window
View 14 Replies View RelatedDoes anyone know how to diable the File => Connect option in Query Analyzer?
Thanks
Clarification:
The situation is that I have several users on an application that controls their access to the DB. The user ID has full rights to the DB but the application stops them from making changes to data. Now I have a user that needs to be able to create and run SELECT statements in a “Query Analyser” type of environment. I can publish a Query Analyser session with locked credentials using Citrix, but I don’t want him to be able to use the File => Connect option to reconnect with one of the application Ids thus giving him full rights in an open environment.
Any ideas?
Thanks
how to completly disable noise words checking in full-text query?
(noise dictionaries already cleared!)
ok can someone tell me why i get two different answers for the same query. (looking for last day of month for a given date)
SELECT DATEADD(ms, - 3, DATEADD(mm, DATEDIFF(m, 0, CAST('12/20/2006' AS datetime)) + 1, 0)) AS Expr1
FROM testsupplierSCNCR
I am getting the result of 01/01/2007
but in query analizer I get the result of
12/31/2006
Why the different dates
-- The 3rd query uses an incorrect column name in a sub-query and succeeds but rows are incorrectly qualified. This is very DANGEROUS!!!
-- The issue exists is in 2008 R2, 2012 and 2014 and is "By Design"
set nocount on
go
if object_id('tempdb.dbo.#t1') IS NOT NULL drop table #t1
if object_id('tempdb.dbo
[code]....
This succeeds when the invalid column name is a valid column name in the outer query. So in this situation the sub-query would fail when run by itself but succeed with an incorrectly applied filter when run as a sub-query. The danger here is that if a SQL Server user runs DML in a production database with such a sub-query which then the results are likely not the expected results with potentially unintended actions applied against the data. how many SQL Server users have had incorrectly applied DML or incorrect query results and don't even know it....?
For each customer, I want to add all of their telephone numbers to a different column. That is, multiple columns (depending on the number of telephone numbers) for each customer/row. How can I achieve that?
I want my output to be
CUSTOMER ID, FIRST NAME, LAST NAME, TEL1, TEL2, TEL3, ... etc
Each 'Tel' will relate to a one or more records in the PHONES table that is linked back to the customer.
I want to do it using SELECT. Is it possible?
When I run the following query from Query Analyzer in SQL Serer 2005, I get a message back that says.
Command(s) completed successfully.
What I really need it to do is to display the results of the query. Does anyone know how to do this?
declare @SniierId as uniqueidentifierset @SniierId = '85555560-AD5D-430C-9B97-FB0AC3C7DA1F'declare @SniierAlias as nvarchar(50)declare @AlwaysShowEditButton as bitdeclare @SniierName as nvarchar (128)/* Check access for Sniier */SELECT TOP 1 @SniierName = Sniiers.SniierName, @SniierAlias = Sniiers.SniierAlias, @AlwaysShowEditButton = Sniiers.AlwaysShowEditButtonFROM SniiersWHERE Sniiers.SniierId=@SniierId
linking two tables together to get an end result
find below the code i have used
The first part of the query provides me with the info i need
SELECT sub.*,
case when rm_sales_band = '2M to 4M' then 'Kirsty' else RM end as rm
into #rmtmp
[Code].....
I have a query that performs a comparison between 2 different databases and returns the results of the comparison. It returns 2 columns. The 1st column is the value of the object being compared, and the 2nd column is a number representing any discrepancies.What I would like to do is use the results from this 1st query in the where clause of another separate query so that this 2nd query will only run for any primary values from the 1st query where a secondary value in the 1st query is not equal to zero.I was thinking of using an "IN" function in the 2nd query to pull data from the 1st column in the 1st query where the 2nd column in the 1st query != 0, but I'm having trouble ironing out the correct syntax, and conceptualizing this optimally.
While I would prefer to only return values from the 1st query where the comparison value != 0 in order to have a concise list to work with, I am having difficulty in that the comparison value is a mathematical calculation of 2 different tables in 2 different databases, and so far I've been forced to include it in the select criteria because the where clause does not accept it.Also, I am not a DBA by trade. I am a system administrator writing SQL code for reporting data from an application I support.
Hi,New to .Net and SQL. I have two tables that I have joined together. RentalControl_Main has the rental informationd and an Adjuster ID that links to the ADjuster table and the adjusters name. I am trying to create a report that gives the "Single" adjuster name and the totals for all of their contracts. I have a details report that gives each contract info. for each specific adjusters rentals. However, I want to just list the adjuster once and give all of their totals. In my SQL statement I have all of it written out and just need to knowwhat to do in place of 'Alex Early' that will give me all of the distinct adjusters.Do I need to code this on the page with a do while loop?Appreciate any help.SELECT SUM(dbo.RentalControl_Main.Rate) / COUNT(dbo.RentalControl_Main.Rate) AS AmtAvg, SUM(dbo.RentalControl_Main.DaysBilled) / COUNT(dbo.RentalControl_Main.DaysBilled) AS DayAvg, SUM(dbo.RentalControl_Main.Rate * dbo.RentalControl_Main.DaysBilled) / COUNT(dbo.RentalControl_Main.Rate) AS TotAvgFROM dbo.RentalControl_Main INNER JOIN dbo.RentalControl_Adjuster ON dbo.RentalControl_Main.AdjusterID = dbo.RentalControl_Adjuster.AdjusterIDWHERE (dbo.RentalControl_Adjuster.AdjusterName = 'Alex Early' AND (dbo.RentalControl_Main.DateClose IS NOT NULL) AND (dbo.RentalControl_Main.AgencyID = '2')
View 1 Replies View RelatedI was wondering if there was a keyword that would allow you to return the number of results from a query such as (this is fake just giving an example so that someone can give me the real answer)
select TotalReturned
from table
where field=""
I am a beginner with SQL, so please excuse any ignorance here.
Under SQL 6.5, when executing a SELECT DISTINCT query against a table in a certain database, the results were returned alphabetized. Now, after migrating the database to SQL 7.0, the same query does not return the results alphabetized. If I add an index for the column specified in the query to the table, the results come back alphabetized. Is there any way to correct this other than adding indexes for all columns in all tables that are queried in this manner?
TIA,
Paige
I am running the same exact query in SQL 2000 and I get different results. Should I try running DBCC CHECKDB and look for errors?
View 5 Replies View Related
Hi,
I have this line of code that when run in the query doesn't return anything:
srv.AGENT_S_ACC_CODE IN ('" & Replace(Replace(Parameters!arcode.Value," ",""),",","','") & "')
The parameter is setup and the query works when I hardcode it with a value but will not return anything with this, does anyone know why?
Thanks,
Rhonda
Hi All,I have an application that reads data from a very slow database link(like 10 seconds per call) though what I am looking for would be ofgeneric use for anyone who has long-running queries that arefrequently repeated.I would like to be able to cache the results of a query so that I donot have to re-execute that query if it is reissued. Ideally Ibelieve that this could be implemented by hiding the query inside aUDF and exposing the UDF through a view. The UDF could then "Checkthe cache" and only run the slow query if there wasn't a match (or ifthe match was too old). From what I understand the best way to dothis would be for the cache to be an extended stored procedure.Has anyone done or seen this? Has someone written a copy that Icould purchase? Does anyone care to offer their opinnion of how or ifthis could work?Thanks in Advance,Steven
View 4 Replies View RelatedHi guys, say i wrote a query that returns 1,000 records.. what kinda query could i write that only returns say the first 50 records of the 1,000 recs..
View 4 Replies View RelatedHello,
I want to select all the customerIDs where an email address exists. Easy: select customerid from customers where emailaddress = @emailaddress
Now I want to use the resulted customerIDs from the above query as a parameter to select all the email addresses with emailstatus equal to 3.
How do I create this type of while statement in a stored procedure? I prefer to not create a temporary table.
My idea was to do it like this:
select emailaddress from emailaddresseswhere emailstatus = 3 and customerid = (select customerid from customers where emailaddress = @emailaddress)
This doesn't seems to work. I get the error:
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
thanks
I have a pretty big SQL query with a one to many sort of relationship...
There are client accounts that we're reporting on. Each account has four different historical categories attached. Each historical category can have maybe fifty entries in each, sorted by date.
I need to figure out how to grab the unique accounts and show only the three most recent results per each historical subcategory with the account... the three most current results from each of the four subcategories, displayed by the parent client account number.
I've created four views to isolate the subcategories as a start, thinking I could bring them into a parent query ...
but my question would be... how do I generate JUST the top three historical transactions by account number? If I select TOP 3, I get only the 3 newest in the MASTER LIST, not per client account, which is what I need to do.
Does this make sense? I could really use a good SQL helping hand with this one.
Thank you!
Can anyone give me the basics of speeding up reports that use queries or views or nested views?
Current reports are now taking over 2 minutes to show.We have thousands and sometimes even millions of records to report against.Queries have 4 and 5 table joins etc.
We are using ASP.NET 2.0 in Visual Studio 2005 and Crystal Reports.
Thanks
Hi,
I would like to use the result table of the first query in a number of other queries. How do I do this ?
Thanks.
I have a database with some over normalized tables in it. The best I can do with one query is get the file ID. In the second query I want to get all the file names, based on all the fileID's I got from the first query. How would I go about doing this?
View 5 Replies View RelatedI have been searching this topic on and for quite some time and can't seem to find a decent answer. Is it feasible to do your paging strictly from a SQL query? Pass the query the pagesize, what page to return and what to sort by?
View 4 Replies View Relatedok the following statement returns the correct results in sql query analyzer but in the .net environment with c# it returns back less 3 records
SELECT SUM(ao.amount),bl.dpc,bl.city from billinglocation bl inner join shippinglocation sl on bl.billinglocationid = sl.billinglocationid inner join absorbentorder ao on sl.shippinglocationid = ao.shippinglocationid group by bl.dpc, bl.city
billinglocation 1 - 1 shippinglocation 1 - many absorbentorder
anybody have any ideas why this might be occuringthanks!
I am running SQL Server 7.0 on NT 4.0. I have created a simple query:
SELECT SUM(month1) As total_month1
FROM eac_manload
WHERE project_number = 8800
and dept IN (50,51,52,55,57,60,61,62,63,64,65,68,69)
I first time I run the query I get the correct result. Subsequent times that I run the query the result is 1 record with a Null value. The data has not changed. If I stop MSSQLSERVER and restart the service I get the correct result the first time and the Null value each time thereafter. Anybody out there with any idea of what is going on here? Any help will be appreciated!!
I have duplicate results in from my query. I am using the distinct clause but this does not seem to be working. In the example below, I do not want the 79.15 to repeat multiple times eventhough the first column has all distinct values. I am using distinct in my select but this is not stopping the duplicates on the second row. Any guidance would be greatly appreciated. Thanks
820.2179.15
820.2279.15
997.379.15
48679.15
038.979.15
428.079.15
263.979.15
276.579.15
250.0079.15
276.879.15
401.979.15
396.379.15
397.079.15
31179.15
365.979.15
E88579.15
E849.779.15
663.3173.59
646.6173.59
599.073.59
V27.073.59
How can I insert the results of a query into a .csv file ?
View 1 Replies View Related