I have a table with an index. It contains column a to
column m. There are two queries that often run :
Query 1: select * from tb where a = '01' and b = '51'
Query 2: select * from tb where a = '01' and
b = '51' and c = 'yy' and d = 'zz'
If I must create only one index and (a+b) may
contains duplicate values. Which ones of the
following index parameters is better for the
two queries above ? :
Parameter1: column a, column b
Parameter2: column a, column b, column c, column d
If (a+b) is unique, which ones should I choose ?
Could anyone help me
Thanks in advance
Anita Hery
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please explain the differences btween this logical & phisicall operations that we can see therir graphical icons in execution plan tab in Management Studio
I am using Full Text Index to index emails stored in BLOB column in a table. Index process parses stored emails, and, if there is one or more files attached to the email these documents get indexed too. In result when I'm querying the full text index for a word or phrase I am getting reference to the email containing the word of phrase if interest if the word was used in the email body OR if it was used in any document attached to the email.
How to distinguish in a Full Text query that the result came from an embedded document rather than from "main" document? Or if that's not possible how to disable indexing of embedded documents?
My goal is either to give a user an option if he or she wants to search emails (email bodies only) OR emails AND documents attached to them, or at least clearly indicate in the returned result the real source where the word or phrase has been found.
Web Base application or PDA devices use to initiate the order from all over the country. The issue is this table is not Partioned but good HP with 30 GB RAM is installed. this is main table that receive 18,0000 hits or more. All brokers and users are using this table to see the status of their order.
The always search by OrderID, or ClientID or order_SubNo, or enter any two like (Client_ID+Order_Sub_ID) or any combination.
Query takes to much time when ever server receive more querys. some orther indexes are also created on the same table like (OrderDate, OrdCreate Date and Status)
My Question are:-
Q1. IF Person "A" query to DB on Client_ID, then what Index will use ? (If any one do Query on any two combination like Client_ID+Order_ID, So what index will be uesd.? How does MS-SQL SERVER deal with these kind of issues.?
Q2. If i create 3 more indexes on ClientID, ORderID and OrdersubID. will this improve the performance of query.if person "A" search record on orderNo so what index will be used. (Mind it their would be 3 seprate indexes for Each PK columns) and composite-Clustered index is also available.?
Q3. I want to check what indexes has been used? on what search?
Q4. How can i check what table was populated when, or last date of update (DML)?
My Limitation is i Dont Create a Partioned table. I dont have permission to do it.
In Teradata we had more than 4 tb record of CRM data with no issue. i am not new baby in db line but not expert in sql server 2003.
My SSIS package is running very slow taking so much time to execute, One task is taking 2hr for inserting 100k records, i have disabled unused index still it is taking time.I am rebuilding/Refreshing indexes and stats once in month if i try to execute on daily basis will it improve my SSIS Package performance?
hello friends i have table1 and 200 coulumn of table1 :) i have 647.600 records. i entered my records to table1 with for step to code lines in one day :) i select category1 category2 and category3 with select code but i have just one index.. it is productnumber and it is primarykey..So my select code lines is so slow.. it is 7-9 second.. how can i select in 0.1 second ? Should i create index for category1 and category2 and category3 ? But i dont know create index.. My select code lines is below.. Could you learn me and show me index for it ?? or Could you learn me and show me fast Select code lines and index or etc ??? Also my search code line have a dangerous releated to attaching table1 with hackers :) cheersi send 3 value of treview1 node and childnode and child.childnode to below page.aspx :) Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not Me.IsPostBack Then If Request("TextBox1") IsNot Nothing ThenTextBox1.Text = Request("TextBox1") End If If Request("TextBox2") IsNot Nothing ThenTextBox2.Text = Request("TextBox2") End If If Request("TextBox3") IsNot Nothing ThenTextBox3.Text = Request("TextBox3") End If End If Dim searchword As String If Request("TextBox3") = "" And Request("TextBox2") = "" Then searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "'" End If If Request("TextBox3") = "" Then searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "' and kategori1= '" & Request("TextBox2") & "'" End If If Request("TextBox3") <> "" And Request("TextBox2") <> "" And Request("TextBox1") <> "" Then searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "' and kategori1= '" & Request("TextBox2") & "' and kategori2= '" & Request("TextBox3") & "'" End If SqlDataSource1.SelectCommand = searchword End Sub
I'm running a merge replication on a sql2k machine to 6 sql2k subscribers. Since a few day's only one of the merge agents fail's with the following error:
The merge process could not retrieve generation information at the 'Subscriber'. The index entry for row ID was not found in index ID 3, of table 357576312, in database 'PBB006'.
All DBCC CHECKDB command's return 0 errors :confused: I'm not sure if the table that's referred to in the message is on the distribution side or the subscribers side? A select * from sysobjects where id=357576312 gives different results on both sides . .
Hi everyone, When we create a clustered index firstly, and then is it advantageous to create another index which is nonclustered ?? In my opinion, yes it is. Because, since we use clustered index first, our rows are sorted and so while using nonclustered index on this data file, finding adress of the record on this sorted data is really easier than finding adress of the record on unsorted data, is not it ??
I have a clustered index that consists of 3 int columns in this order: DateKey, LocationKey, ItemKey (there are many other columns in this data warehouse table such as quantities, prices, etc.).
Now I want to add a non-clustered index on just one of the other columns, say LocationKey, like this: CREATE INDEX IX_test on TableName (LocationKey)
I understand that the clustered index keys will also be added as key columns to any NC indexes. So, in this case the NC index will also get the other two columns from the clustered index added as key columns. But, in what order will they be added?
Will the resulting index keys on this new NC index effectively be:
LocationKey, DateKey, ItemKey OR LocationKey, ItemKey, DateKey
Do the clustering keys get added to a NC index in the same order as they are defined in the clustered index?
Quick question about the primary purpose of Full Text Index vs. Clustered Index.
The Full Text Index has the purpose of being accessible outside of the database so users can query the tables and columns it needs while being linked to other databases and tables within the SQL Server instance. Is the Full Text Index similar to the global variable in programming where the scope lies outside of the tables and database itself?
I understand the clustered index is created for each table and most likely accessed within the user schema who have access to the database.
Is this correct?
I am kind of confused on why you would use full text index as opposed to clustered index.
One of the major syntax inside the SELECT statment is ..
WHERE FIELDA IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='A') AND WHERE FIELDB IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='B') AND WHERE FIELDC IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='C') AND WHERE FIELDD IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='D') AND WHERE FIELDE IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='E') AND WHERE FIELDF IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='F')
(It's to compare the field content with some user input parameter inside a parameter table... )
I think properly is that the SELECT ... IN is causing much slowness in the sql statement. I have indexed FIELDA , FIELDB, FILEDC etc and those PARAVALUE and PARATYPE in the PARATABLE table. But perfromance is still slow and execution takes >20 seconds for 200000 rows of records.
Do any one know if still any chance to improvide the performance like this?
I'm trying to find whether there is a dmv or system view that can help me see the last time an index was rebuilt or created. Assuming I rebuilt an index using tsql commands (not a job with a history), is there a way to find out the last time that index was rebuilt?
SELECT a.AssetGuid, a.Name, a.LocationGuid FROM Asset a WHERE a.AssociationGuid IN ( SELECT ada.DataAssociationGuid FROM AssociationDataAssociation ada WHERE ada.AssociationGuid = '568B40AD-5133-4237-9F3C-F8EA9D472662')
takes 30-60 seconds to run on my machine, due to a clustered index scan on our an index on asset [about half a million rows]. For this particular association less than 50 rows are returned.
expanding the inner select into a list of guids the query runs instantly:
SELECT a.AssetGuid, a.Name, a.LocationGuid FROM Asset a WHERE a.AssociationGuid IN ( '0F9C1654-9FAC-45FC-9997-5EBDAD21A4B4', '52C616C0-C4C5-45F4-B691-7FA83462CA34', 'C95A6669-D6D1-460A-BC2F-C0F6756A234D')
It runs instantly because of doing a clustered index seek [on the same index as the previous query] instead of a scan. The index in question IX_Asset_AssociationGuid is a nonclustered index on Asset.AssociationGuid.
The tables involved:
Asset, represents an asset. Primary key is AssetGuid, there is an index/FK on Asset.AssociationGuid. The asset table has 28 columns or so... Association, kind of like a place, associations exist in a tree where one association can contain any number of child associations. Each association has a ParentAssociationGuid pointing to its parent. Only leaf associations contain assets. AssociationDataAssociation, a table consisting of two columns, AssociationGuid, DataAssociationGuid. This is a table used to quickly find leaf associations [DataAssociationGuid] beneath a particular association [AssociationGuid]. In the above case the inner select () returns 3 rows.
I'd include .sqlplan files or screenshots, but I don't see a way to attach them.
I understand I can specify to use the index manually [and this also runs instantly], but for such a simple query it is peculiar it is necesscary. This is the query with the index specified manually:
SELECT a.AssetGuid, a.Name, a.LocationGuid FROM Asset a WITH (INDEX (IX_Asset_AssociationGuid)) WHERE a.AssociationGuid IN ( SELECT ada.DataAssociationGuid FROM AssociationDataAssociation ada WHERE ada.AssociationGuid = '568B40AD-5133-4237-9F3C-F8EA9D472662')
To repeat/clarify my question, why might this not be doing a clustered index seek with the first query?
Hello, since a couple of days I'm fighting with RS 2005 and the Stored Procedure.
I have to display the result of a parameterized query and I created a SP that based in the parameter does something:
SET ANSI_NULLS ON SET QUOTED_IDENTIFIER ON CREATE PROCEDURE [schema].[spCreateReportTest] @Name nvarchar(20)= ''
AS BEGIN
declare @slqSelectQuery nvarchar(MAX);
SET NOCOUNT ON set @slqSelectQuery = N'SELECT field1,field2,field3 from table' if (@Name <> '') begin set @slqSelectQuery = @slqSelectQuery + ' where field2=''' + @Name + '''' end EXEC sp_executesql @slqSelectQuery end
Inside my business Intelligence Project I created: -the shared data source with the connection String - a data set : CommandType = Stored Procedure Query String = schema.spCreateReportTest When I run the Query by mean of the "!" icon, the parameter is Prompted and based on the value I provide the proper result set is displayed.
Now I move to "Layout" and my undertanding is that I have to create a report Paramater which values is passed to the SP's parameter... So inside"Layout" tab, I added the parameter: Name allow blank value is checked and is non-queried
the problem is that when I move to Preview -> I set the value into the parameter field automatically created but when I click on "View Report" nothing has been generated!!
I have two report , first is main report which is matrix and have one parameter User_ids which is multi value selection and my second report is basic chart of user_wise performance.
Now, my main report (matrix ) works fine for Multiple selection of users and i have putted one textbox on main report chart which has action properties set for chart report, when user click on chart button it must goes to chart with user selected in main report. Now , i have used expression for parameter to send it like ..
=join(parameter!user_id!value,",") which pass selected value to chart
And when I am selecting single user it passing that value to chart parameter list but , when it is more than one user it errors with conversion failed when converting the nvarchar value '121,128' to data type int. But my chart also works when passing 121,128 in user parameter in preview of report .
I need "conditional" cascading parameters: In Report Manager when one changes parameter 1, parameter 2 get changed based on parameter 1. Optionally, one can also enter values to parameter 2 directly.
I was able to achieve this in SSRS 2000 (SP2) with the following setups. SSRS 2005 and SP1 no longer works - Parameter 2 always shows its default value regardless whether one select a value in Parameter 1 or not.
Parameter 1 available values: from query default values: non query (specify a value "<None>") Parameter 2 available values: Non query (no value specified) default values: from query (based on Parameter 1)
It seems to me that the default value in SSRS 2000 is considered as cascading parameter. But it is no longer the case in SSRS 2005.
Is this a SSRS 2005 bug? is there any other work arounds or suggestions?
I have parameters in my report. The user can choose the year, month and date (3 parameters). Now I want to set default vaules for the parameters , so that the user sees the report for example for the current day without selecting the parameters. I tried to set the type of the parameters to DateTime and the default value for example for the year to "=Today().Year" . But when I execute the report an error occures . Something like : no validValue for this parameter.
My Attributes for the year month and date are from an Analyis Services Cube from a Server Time dimension . Does somebody know how to make it possible to set default values for this parameters?
Other question :
Does somebody know how I can reduce the values for a parameter. For Example I have a parameter "year" from a server time dimension from a cube. The values which are available are "Year 2004", "Year 2005", "Year 2006", "Year 2007". But I want that the user only can choose "Year 2006" or "Year 2007" ant not every Year or "All". Or Other Example: The User should only choose a Date that is int the past or Today but not a Date in the future.
my dataset from sharepoint list. and this dataset value assign to parameter. i want when no any parameter is selected than it should filter like "ALL". when i select alow null value it give me prompt error you can not select null in multivalue parameter.How can i do it. i am using share point list.
Does anyone know if this is possible right out of the box in SSRS 2005 against an OLAP data source?
I have several parameters. My second parameter is to be filtered based on the first parameter (kinda like cascading), but how do I do this against an OLAP data source? Lets say I have param1 and param2 in a dataset. I want Param2 to show the locations only based on what I select in Param1. Same but a little different: I have Parameter1 and then my second parameter (Param2) is a boolean (True/False). I want to show Parameter 3/Paramater 4 based on selection of Param2 (So, if true, show Param3, if false, show Param 4) and remember we are doing this in a sequence. Can you do this thru SSRS? Any help would be great. Thanks for your time in advance. Kent
Is it possible to fill a parameter list with values based on another parameter value? Here's what I have so far (which hasn't worked)... I'd like to generate a report listing information for a student. The report viewer would first select a school from the first drop-down menu, and then the second drop-down menu would populate with the list of students at that school. I have a dataset that calls a sp which returns a list of schools (SchoolID and SchoolName fields from the database table). I have another dataset that calls a sp (with SchoolID as the parameter) which returns a list of students for that school. Both datasets return the appropriate data when tested individually, but when I set up the Report Parameters and build the report, these errors come up... The value expression for the query parameter '@SchoolID' refers to a non-existing report parameter 'SchoolID'. The report parameter 'Student' has a DefaultValue or a ValidValue that depends on the report parameter "SchoolID". Forward dependencies are not valid. ...Is it possible for the reoprt to generate a list of available parameter values based on the value selected for another parameter? Any help you can give me would be great!! Thank you
I am using reporting services 2012, Can we make visibility of report parameter dynamic, ie can we make parameter visible or hide on certain condition or its visibility depends on other parameters Is this feature available in any other updated version of ssrs?
I had thought that this was possible but I can't seem to figure out the syntax. Essentially I have a report where one of the parameters is populated by a stored procedure.
Right now this is easily accomplished by using "exec <storedprocname>" as the query string for the report parameter. However I am not clear if it is possible to now incorporate User!UserID as parameter to the stored procedure. Is it? Thanks
I would like to be able to adjust the multi-value property of a parameter based on the value of another parameter in my report. The controlling paramter would be binary with two options for Single or Multiple selection. I would like my parameter to default to multi-value, which I can do on the screen selection. I have tried to add an IIF statement to the XML code, with no success. Any ideas would be helpful.
I have a report parameter called para1 which is a drop-down list and what I want to do is display another report parameter based on the para1 selection.
So for example, para1 contains a, b, c choices. if a user selects b, I would like para2 to display but if the user selects a or c, I don't want the para2 to display.
