table users have a clustered (PK) index on userid
table pictures have a clustered (PK) index on userid
when I do this query:
"select userid from pictures where userid=123"
then It will do a clustered index seek
But If I do any of those:
"select t2.userid from users t1 left join t2 on t1.userid = t2.userid"
or
"select (select userid from pictures where usedid = t1.userid) from users t1"
It will do a clustered index scan.
How can I force it to seek my index instead of scan?
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.
Hi All,I have one question about many "or" operation make system chooseincorrect indexThere is one table TT (C1 VARCHAR(15) NOT NULL,C2 VARCHAR(15) NOT NULL,C3 VARCHAR(15) NOT NULL,C4 VARCHAR(15) NOT NULLC5 VARCHAR2(200),)Primary Key TT_PK (C1, C2, C3, C4)SELECT C1, C2, C3, C4 FROM TT WHERE C1 = 'TEST' AND ((C2 ='07RES' AND C3 = '00000' AND C4 = '02383') OR (C2 = '07RES' ANDC3 = '00000' AND C4 = '02382') OR (C2 = '07RES' AND C3 = '00000'AND C4 = '02381') OR (C2 = '07RES' AND C3 = '00000' AND C4 ='02380') OR (C2 = '07RES' AND C3 = '00000' AND C4 = '02379') OR(C2 = '07RES' AND C3 = '00000' AND C4 = '02378') OR (C2 = '07RES'AND C3 = '00000' AND C4 = '02377') OR (C2 = '07RES' AND C3 ='00000' AND C4 = '02376') OR (C2 = '07RES' AND C3 = '00000' ANDC4 = '02375') OR (C2 = '07RES' AND C3 = '00000' AND C4 ='02374') OR (C2 = '07RES' AND C3 = '00000' AND C4 = '02373') OR(C2 = '07RES' AND C3 = '00000' AND C4 = '02372').... about 100 or operationsOR (C2 = '07COM' AND C3 = '00000' AND C4 = '00618') OR (C2 ='07COM' AND C3 = '00000' AND C4 = '00617') OR (C2 = '07COM' ANDC3 = '00000' AND C4 = '00616') OR (C2 = '07COM' AND C3 = '00000'AND C4 = '00608') )The system choose index prefix, and query all index leaf withC1='TEST'Prefix: [dbo].[TT].C1 = 'TEST'After I reduce the OR operators to 50, it use choosePrefix: [dbo].[TT].C1, [dbo].[TT].C2,[dbo].[TT].C3,[dbo].[TT].C4='TEST, '07RES', '00000', '02383'Then Merge Join, it is very quick,Can anyone help on this, do I have to reduce the OR operator to 50?Thanks in advance!
Identity(1,1) column ID is primary key and only clustered index key.
Rows will be inserted regularly into this table, hundreds per day.
Queries will be mostly selecting on the most recent records.
In a year, the row will have half a million records or so and only the most recent records will be used. There will be a forward-rolling hot spot, of most recent records.
Does the direction of the ID column in the clustered index make a difference?
I'm thinking no, because query plan will go to that leaf in an index seek regardless of whether it is old or new, "bottom" or "top" of index, especially if the query is very specific on the ID.
please explain the differences btween this logical & phisicall operations that we can see therir graphical icons in execution plan tab in Management Studio
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?
Found out a while back that my facts-tabel has an non-clustered index on its facts_id. In a bunch of procedures an update is executed against a facts_id unfortunately on it's facts-table. I was wondering if changing it into a clustered index is worth the effort / would make sense considering a +110 million facts and re-indexing the other indexes as well? Facts are loaded sequentially, so I would suspect them facts are in the ordered already?
Can somebody help me convert this SQL2000 Function TO C# Function pleaseCREATE Function dbo.CalculateNextRentDate ( @Rent_Payment_Date datetime, @Frequency varchar(50) , @Number int)RETURNS DATETIMEASbeginDECLARE @NextPaymentDate DatetimeSET @Number = @Number - 1.IF @Frequency = 'month' IF @rent_payment_date = dateadd(month, datediff(month, 0+@Number, @rent_payment_date) + 1, -1) BEGIN SET @NextPaymentDate = dateadd(month, datediff(month, 0, @rent_payment_date) + 2, -1) END ELSE BEGIN SET @NextPaymentDate = dateadd(month, 1+@Number, @rent_payment_date) END return @NextPaymentDateend
Our company has its Departments And Services. Now We are making it online. Both have separate email list, phone numbers, and more. Will I make one table and adds the field Type (Values: D or S). Or make them separate. Remember one thing If we merge them then Email And PhoneNumber Table will also me merge other wise they will also separate. What is better.
How to make our own DTS package I have to split the data on my own.. Data is very biig almost 30 to 40 million. I need to splitt them into 10k chunks in database and with my desired table name. Waiting for a +tive reply.
hi i have a tabel in my database i tray to generat report for this tabel this tabel have all this fields: company_id emp_no seq_no interval_date in_time in_type out_time out_type wage_code status i want all his colums can be search but with company_id like if he enter company_id and emp_no okay give him result if he enter Company_id and interval_date okay give him result i write this
Code Snippet SELECT company_id, emp_no, seq_no, interval_date, in_time, in_type, out_time, out_type, wage_code, status FROM interval WHERE (company_id LIKE @CompanyID) AND (emp_no LIKE @EmployeeID) OR (company_id = @CompanyID) AND (interval_date = @IntervalDate) OR (company_id = @CompanyID) AND (in_time = @InTime) OR (company_id = @CompanyID) AND (in_type = @InType) OR (company_id = @CompanyID) AND (out_time = @OutTime) OR (company_id = @CompanyID) AND (out_type = @OutType) OR (company_id = @CompanyID) AND (wage_code = @WageCode) OR (company_id = @CompanyID) AND (status = @Status)
but in report preview it tell me i must enter intrevalDate ?
Hi have have this problem, I have a table called PABX that has all the callings registry and what I need to do is for each client(PABX.cod_client) I have 2 types of calls (VC1, VC2) , and for these types I need to select all the registries chaging the dialed number(PABX.NRTELEFONE) for the new one (TROCAR.NRTELEFONE) and for those client that doesn't need to change select the PABX.NRTELEFONE
is it possible through SQL Server 2000(via stored procedure) or I'll need to do it by my application using a vector ?
hiiiiiiiiii I am creating a web application using vb.net in which i m using the concept of classes. now i am done all the code for inserting the values in the database using the class but it is difficult to fetch the values from the database using select command and sending them to a WebForm . i want to know how i send send the values coming from the select command to a datagrid or another web controlif possible provide me a sample code thanks for your help
hello all i have a 2 questions hope that u can help me my first question is: in ms access there was a data type named yes/no and it was a checkbox is there a checkbox data type in sql server 2005? my second question is i need the connection code between asp.net 2005 and sql server 2005 i searched in here for that code but i got more confuse i found two codes and both are not working so hope u can give me the right connecting code. that's all thanks
Can anyone tell me how I would go about making my SQL server accessable from the Internet, or know of any good tutorials to get me started, I haven't had much luck looking on google.
I need to access an SQL database from one server on another server for a web application.
