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 y'all,
I've recently run a profiler on my code and following query took 7 seconds:
SELECT TOP 10 UI, COUNT(UI) AS Expr1 FROM table WHERE (UI <> 'custom_welcome') GROUP BY UI ORDER BY COUNT(UI) DESC
Is it possible to rewrite this so my code gets faster? It's also possible that it's due to the size of the table?
Thanks in advance! I'll let you know how long your query takes :)
Hi!
I M basically an application developer & use simple sql queries in my programmings. I do not have much idea abt tuning/auditing part & thatswhy i m unable to answer them properly in my interviews. Can anybody give me some tips?????
Question 1:
In a stored procedure, One SELECT stmt is there & depending upon the @rowcount, it updates around 14000 records which is also written inside this stored procedure. Instead of writing this way, there is some other way which is faster than this. Can anybody tell me the correct way???
Question 2:Can anybody give me few examples like this?????? I need them desparetly.
Thanx. Bye.
I have rewritten a stored procedure that consists of a single select that selects from a view. Essentially I combined the select in the view and the select in the sp into one select. I am now trying to determine if the new version is faster.
The estimated execution plan gives a ratio of 96% : 4% in favour of the new version when I run them together from a query window but when I try to time them I can't get a satisfactory result.
If I run each query once and display the difference between start and end time, they display 0. If I run each one 100, 200, etc times I get different results each time.
Is there anything I can do?
I need help makeing the following query run more efficently.
Code:
SELECT t1.ID,t1.firstName,t1.lastName,t1.address,t1.city,t1.state, t1.zip,t1.locationAddress,t1.locationCity,t1.locationState,t1.locationZip
FROM Landlord_tbl t1
left outer join Mail_tbl t2
ON t2.potentialSitesID = t1.potentialSitesID
WHERE t2.mailed_out_date is null and NOT(t1.firstName+t1.lastName) is Null
GROUP BY t1.ID,t1.firstName,t1.lastName,t1.address,t1.city,t1.state, t1.zip,t1.locationAddress,t1.locationCity,t1.locationState,t1.locationZip
ORDER BY t1.firstName, t1.lastName, t1.city, t1.state
Hi, when I execute the sql in DBTestArchive and then DBTest query analyzer , I found that the run time is shorter in DBTest. Can I make assumption that the query run time is shorter in DBTest if I select data from it and insert into another database? Thanks.
INSERT INTO DBTestArchive.dbo.tblVendorMasterArchive
SELECT * FROM DBTest.dbo.tblVendorMaster
I have a query which will display the employee name who is handling maximum number of project.
the query is
Code Snippet
select EmployeeDetails.Empid,
EmployeeDetails.FirstName + ' '+EmployeeDetails.LastName as EmpName,
count(*) as Number_Of_Projects
from EmployeeDetails left outer join LUP_EmpProject
on EmployeeDetails.Empid= LUP_EmpProject.Empid
group by EmployeeDetails.Empid,EmployeeDetails.FirstName,EmployeeDetails.LastName
HAVING count(*)=(SELECT TOP 1 COUNT(EmpID)
FROM LUP_EmpProject GROUP BY EmpID ORDER BY 1 DESC)
where EmployeeDetails table contain empname and empid. LUP_EmpProject table contain empid and project id.
Can anybody help me in writing a better query than the above given?
Please help!!!!!!!!!!
I have a query which joins multiple tables. This query has suddenly begun to take up to 2 minutes to run (vs. 5-10 seconds previously).
No major change in number of records in the tables (currently about 220,000). When I remove the PK from one of the tables which then forces a tablescan, the query returns to running in 5-10 seconds. If I add the PK back, performance is back to 2 minutes.
Any suggestions short and/or long term?
Thanks for any help.
Any help would be really appreciated....
My stored procedure...
CREATE PROCEDURE business3rd7
@Fromdate DATETIME,
@ToDate DATETIME
AS
select distinct CONVERT(VARCHAR(10),Receipts.Companynumber1)+CONVE RT(VARCHAR(10),Receipts.Companynumber2) as co ,
Receipts.Premium1+Receipts.Premium2 as Premium,
"CAN"=case when Receipts.transactiontype='CAN'
then (receipts.premium1+receipts.premium2)
else 0
end,
"NET"=Receipts.Premium1+Receipts.Premium2-case when Receipts.transactiontype='CAN'
then (receipts.premium1+receipts.premium2)
else 0
end,
"#NEW"=case when Receipts.transactiontype='NEW' then count(Receipts.policynumber) else
0 end,
-------
"$NEW"=
case when Receipts.transactiontype='NEW' then (Receipts.Premium1+Receipts.premium2)
else 0 end,
"#REN"=case when Receipts.transactiontype='REN' then count(Receipts.policynumber) else
0 end,
"$RENEW"=
case when Receipts.transactiontype='REN' then (Receipts.Premium1+Receipts.premium2)
else 0 end,
"#AP"=case when Receipts.transactiontype='AP' then count(Receipts.policynumber) else 0
end,
"$AP"=
case when Receipts.transactiontype='AP' then (Receipts.Premium1+Receipts.premium2) else
0 end,
"#SENT"=case when policy.Renewalofferdate between @Fromdate AND @ToDate then
count(policy.policynumber) end,
"%"=case when case when Receipts.transactiontype='REN' then count(Receipts.policynumber)else 0
end =0 then 0
when case when policy.Renewalofferdate between @Fromdate AND @ToDate then
count(policy.policynumber) else 0 end=0 then 0
else
case when Receipts.transactiontype='REN' then count(Receipts.policynumber)else 0
end /case when policy.Renewalofferdate between @Fromdate AND @ToDate then
count(policy.policynumber) else 0 end end,
"Current Year"= case when policy.Renewalofferdate between @Fromdate AND @ToDate then
count(clubamount) end,
"Previous Year"=case when policy.Renewalofferdate between DateAdd(year, -1, @Fromdate)
AND DateAdd(year, -1, @ToDate) then count(clubamount) end,
"#AA"=count(receipts.clubamount),
"$AA"=sum(receipts.clubamount)
FROM Receipts,Policy
where Receipts.Agencyid=Policy.Agentid
group by
Receipts.CompanyNumber1,Receipts.CompanyNumber2,
Receipts.Premium1,Receipts.Premium2,
Receipts.TransactionType,policy.Renewalofferdate,
Receipts.Agencyid
GO
Query plan...
----------------------Query Plan
|--Sort(DISTINCT ORDER BY:([Expr1008] ASC, [Expr1009] ASC, [Expr1010] ASC, [Expr1011] ASC, [Expr1012] ASC, [Expr1013] ASC, [Expr1014] ASC, [Expr1015] ASC, [Expr1016] ASC, [Expr1017] ASC, [Expr1018] ASC, [Expr1019] ASC, [Expr1020] ASC, [Expr1021] ASC, [Ex
|--Compute Scalar(DEFINE:([Expr1008]=Convert([Receipts].[CompanyNumber1])+Convert([Receipts].[CompanyNumber2]), [Expr1009]=[Receipts].[Premium1]+[Receipts].[Premium2], [Expr1010]=If ([Receipts].[TransactionType]='CAN') then ([Receipts].[Premium1]+[R
|--Compute Scalar(DEFINE:([Expr1004]=Convert([Expr1076]), [Expr1005]=Convert([Expr1077]), [Expr1006]=Convert([Expr1078]), [Expr1007]=If ([Expr1078]=0) then NULL else [Expr1079]))
|--Stream Aggregate(GROUP BY:([Receipts].[CompanyNumber1], [Receipts].[CompanyNumber2], [Receipts].[Premium1], [Receipts].[Premium2], [Receipts].[TransactionType], [Policy].[RenewalOfferDate], [Receipts].[AgencyID]) DEFINE:([Expr1076]=COUN
|--Sort(ORDER BY:([Receipts].[CompanyNumber1] ASC, [Receipts].[CompanyNumber2] ASC, [Receipts].[Premium1] ASC, [Receipts].[Premium2] ASC, [Receipts].[TransactionType] ASC, [Policy].[RenewalOfferDate] ASC, [Receipts].[AgencyID] ASC))
|--Hash Match(Inner Join, HASH:([Policy].[AgentID])=([Receipts].[AgencyID]), RESIDUAL:([Policy].[AgentID]=[Receipts].[AgencyID]))
|--Table Scan(OBJECT:([gasInquiry].[dbo].[Policy]))
|--Table Scan(OBJECT:([gasInquiry].[dbo].[Receipts]))
The two tables has number of records as 13349 and 97032.It taking more than 30 mins...
Any way to make it faster...
Yesterday i face a strange SQL Server 2000 behaviour :-(
I had a query that was wrapped inside a stored procedure, as usual.
Suddenly, the stored procedure execution time raised from 9 secs to 80.
So to understand where the problem was i cut and pasted the sp body's into a new query analyzer window an then executed it again. Speed back to 9 secs.
Tried stored procedure again, and speed again set to 80 secs.
Tried to recompile sp. Nothing. Tried to restart SQL Server. Nothing. Tried to DROP & RE-CREATE sp. Done! Speed again at 9 secs.
My collegue asked me "why?", but i had no words. :confused: Do you have any explanation?
Hello
DTS is notoriously faster than making the following statement:
insert into synonym_MyRemoteTable
select * from myLocalTable
Why is it so?
Thanks a lot.
Let's say I have a table of users.
Let's imagine there's two fields:
username (PK),
password
Now I need to authenticate a user against this table. What is the recommended approach? Is it better / faster to
(1) SELECT * FROM [User]
WHERE username = 'whatever' AND password='whatever'
or
(2) SELECT * FROM [User]
WHERE username = 'whatever'
and then in my code check that the record returned matched the password?
I have an stored procedure that takes 23 seconds to execute. However, the same query is executed in 4 seconds.
All the tests where made using the Query Analizer.
What could be wrong?
Thanks a lot in advance.
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 RelatedIt seems when I run the query with the set staticts IO on then statistic reports back with the 'work table', and the query takes 30+ sec. if the worktable is ommited(whatever the reason?) the query take less 1 sec.
Here is my take, I believe work table is created in tempdb...and if not then whole query is using the cached page, am I right?
if I am right then the theory is, if I increase the (via sp_configure) server min memory setting and min query memory, the query ought use the cached page and return in less 1 sec. (specially there is absolutely no one but me on the server), so far I can't make it go faster...what setting am I missing to make it run faster?
Another question is if the query can not avoid but use the tempdb, is it going to always be 30 sec+ time? why is tempdb involvement make it go so much slower?
Thanks in for you help in advance
Hello. 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.
Hi,
I apologize for the long post but I am trying to give as much information as I can about the steps I've taken to troubleshoot this.
We have a stored procedure that builds a sql statement and executes it using the Execute command. When I execute the stored procedure through query analyzer it takes close to 5 seconds to execute. When I print out the exact same statement and execute it directly in query analyzer as "raw sql", it takes 0.5 seconds - meaning it takes 10 times longer for the code to execute in the stored proc. I altered the stored proc to execute the printed sql instead of building but it still takes the full 5 seconds and there were no changes in the execution plan. This makes me confident that the issue is not caused by the dynamic sql. I've used with recompile to make sure that the stored procedure caches the most recent execution plan. When I compare the execution plans, the stored proc uses a nested loop whereas the raw sql statement uses a hash join. Seeing that, I added the hash hint to the stored proc and doing so brought down the execution time down from 5 secs to 2 secs but still the raw sql statement uses a clustered index whereas the stored proc uses a non-clustered index and that makes the statement 4 times slower. This proves how efficient clustered indexes are over non-clustered ones, but it doesn't help me since, as far as I know, I can't force SQL Server to use the clustered index.
Does anyone know why sql server is generating such an inefficient execution plan for the stored proc compared to the execution plan that it generates when executing the raw sql statement? The only thing I can think of is that some stats are not updated and that somehow throws off the stored proc. But then again, shouldn't it affect the raw sql statement?
Thank you,
Michael Tzoanos
Hello,everyone!!
There is a query which when executed in the grid mode(ctrl+d) takes approx 0.02 seconds(about 21,000
rows) But when I execute in the text mode, it takes about 0.40 seconds!!
Why is this difference?
Also, when the records from this table are read from a VB application, they are equally slow (as in the text mode!)
Why is it so slow on the text mode & relatively faster in the grid mode?
Has anyone got any idea on ‘Firehose’ style cursor ?(which may speed up access of data in the VB application)
Rgds,
Adie
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 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!
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.