Hi all,I have a table with this structure:Customer ID | Transaction date | Transaction type1 | 1/2/2008 | F1 | 1/4/2007 | M1 | 1/2/2008 | R2 | 1//5/2007 | M2 | 1/6/2007 | RFor each customer ID, I need to retrive only the records with the mostrecent transaction date, and I did:Customer ID | Transaction date | Transaction type1 | 1/2/2008 | F1 | 1/2/2008 | R2 | 1/6/2007 | RThe problem is, each customer can make more than one transaction inthe same day (see above). In these cases, I need to retrieve only onerecord per customer, based on the importance of the transaction: F ismore "important" than R which is more "important" than M. So, in theexample above, I would only retrieve transaction F for customer 1 anddisregard transaction R: they were made on the same date, but I ammore interested in F than in R.Do you have any suggestions on how I could achieve this in SQL?I use Microsoft SQL server 2005.Thank you for your help!
writing the query for the following, I need to collapse the continuity. If the termdate for an ID is one day less than the effdate of the next id (for the same ID) i need to collapse the records. See below example .....how should i write the query which will give me the desired output. i.e., get min(effdate) and max(termdate) if termdate is one day less than the effdate of next record.
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?
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
Hello,if you create this table:create table hello (int a, int bconstraint pk_hello primary key clustered ( a, b ))and then insert the following recordsa,b1,11,21,32,12,22,33,13,23,3and then doselect a,b from hellothe output seems to be:a,b1,12,13,11,22,23,21,32,33,3which is wrong and (i think) is reflecting the actual index orderand physical order on diskit should be:a,b1,11,21,32,12,22,33,13,23,3i have tested this on a table with 500,000 recordsand sure enough if you declare the clustered primary key fields inreverse order:constraint pk_hello primary key clustered ( b, a )two things happen:- the select with no order by returns the records in the expected order- queries relying on that order run MUCH FASTERhas anyone else seen / noticed this?
Hello there,I got a problem when I'm trying to Index a table with PrimaryKeyMy code so far:1 'Create my table2 nonqueryCommand.CommandText = "CREATE TABLE UpdateHistory (id integer IDENTITY(1,1) NOT NULL, version varchar(50) NOT NULL)"3 Console.WriteLine(nonqueryCommand.CommandText)4 Session("Tables") = Session("Tables") + "Number of Rows Affected with table UpdateHistory is: " + nonqueryCommand.ExecuteNonQuery().ToString + "<br />"5 6 'Set column id to Primary Key7 nonqueryCommand.CommandText = "CREATE INDEX idxid ON UpdateHistory (id) With PRIMARY"8 Console.WriteLine(nonqueryCommand.CommandText)9 Session("Tables") = Session("Tables") + "PrimaryKEY - Number of Rows Affected with table UpdateHistory is: " + nonqueryCommand.ExecuteNonQuery().ToString + "<br />" I do get this error:System.Data.SqlClient.SqlException: Incorrect syntax near the keyword 'PRIMARY'. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at updates_100_2.Page_Init(Object sender, EventArgs e) in http://server//admin/NewSystem/1.0.0/2.aspx.vb:line 163Note: Line 163 is 9 here.. Anyone who can see what I'm doing wrong?
Running SQL 6.5, using ActiveX controls(ADO and Datagrid),NT 4.0. All SP's are current.
I lose the ability to get distinct values with a client-side cursor after I set up a primary key. Select distinct works perfect before the primary key creates an index. Any ideas?
I have a table in my SQL 2000 database called utContact, this has a primary called ContactID (int, idenitity), by default this should have a clustered index on it, but when I go to view the indexes on the table it shows the primary key index as non clustered.
How can this be?
SQL server also will not let me change the index to clustered, but I need to as this is causing a lot of table scans in query execution plans.
Any help or advice on this matter would be greatly appreciated.
One of my client having 1 million(nearly) records in a table. I defined the table as below 1) Created table with one col(we can name it as "ID") having IDENTITY 2) Using "alter table", I created CLUSTERED PRIMARY KEY Constraint on Same field (ID) 3) The Primary key having 2 ref with another 2 tables
Now the issue is when we create or define a primary key (With Clustered Option) automatically cluster Index will be created on defined table
As such table having huge data whenever any updation or insertion against that particular table taking huge amount of time, because the cluster Index trying re-paging whole data. Because of re-paging each and every time "Transaction Log also growing in huge" (database is in full recovery mode and client wants in same mode only) Data partitioning not posible because whole data related and current live data
I tried following options with vain
1) To Clear transaction log I suggested to take regular log backup's 2) I tried to drop cluster index and tried to implement non clustered index Drop and re-create index is take taking huge amount of time Even in this process I have to Re_Index remaining Index's also
Pls give me any other solution or suggestion in this regard
'PXQ_2' table - Unable to delete index 'PK_PXQ'. ODBC error: [Microsoft][ODBC SQL Server Driver][SQL Server]I/O error (bad page ID) detected during read at offset 0x0000000102e000 in file 'D:MSSQL2000MSSQLxxx.mdf'.
I can't drop Primary Key. How to fix this problem?
I want to keep certain archive data in certain tables. One such table is currently about 190 GB in size. It has a primary key with clustered index and three non-clustered indexes. The type of queries fired are strictly selects (daily) and inserts (only monthly).
Question: Is it advisable to have a non-clustered index on the primary key column?.....I am finding that the insert performance is getting hurt due to presence of clustered index on such a large table (190 GB).
I have a question regarding updating statistics for a primary key.
Background: An update statistics with fullscan is sometimes taking 30 minutes - the table is 80 million rows, with only 4 columns. The table is truncated, and then 80 million rows inserted all in one go.
Now why the update stats is taking that long is another question (I have no idea - any thoughts?), but my question is; Since you can't disable the "not automatically recompute statistics" option for a primary key, and you would think it would be imperitive for the stats to be kept up to date for a PK for inserts.... does this mean the stats would be kept up to date? and an update stat with fullscan isn't required?
Ok, I'm really new at this, but I am looking for a way to automatically insert new records into tables. I have one primary table with a primary key id that is automatically generated on insert and 3 other tables that have foreign keys pointing to the primary key. Is there a way to automatically create new records in the foreign tables that will have the new id? Would this be a job for a trigger, stored procedure? I admit I haven't studied up on those yet--I am learning things as I need them. Thanks.
Is there a dynamic management view or system procedure which I can use to find out what columns are in an index, what columns are as an INCLUDE in the index and whether or not the column(s) are ascending or descending. This is excluding the utilities I already know about below:
sys.indexes sys.index_columns sp_helpindex dm_db_index_physical_stats dm_db_index_operational_stats I only ask because it is a pain to look through the sys.indexes and sys.index_columns tables every time I want to know about what columns are in the index created. I also know that scripting the index would give me the information I need but there must be a better way.
Table1 with column: Year char(4), Quarter char(1), ID decimal(10,0), Hits int PK_table1 on Year,Quarter,Hits
If i do a "Select Year From table1 group by Year", the executionplan looks like
select year from dbo.table1 group by year110NULLNULL1NULL4NULLNULLNULL86,21644NULLNULLSELECT0NULL |--Stream Aggregate(GROUP BY:([Testdb].[dbo].[Table1].[YEAR]))121Stream AggregateAggregateGROUP BY:([Testdb].[dbo].[Table1].[YEAR])NULL406E-061186,21644[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW01 |--Parallelism(Gather Streams, ORDER BY:([Testdb].[dbo].[Table1].[YEAR] ASC))132ParallelismGather StreamsORDER BY:([Testdb].[dbo].[Table1].[YEAR] ASC)NULL800,028547491186,21643[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW11 |--Stream Aggregate(GROUP BY:([Testdb].[dbo].[Table1].[YEAR]))143Stream AggregateAggregateGROUP BY:([Testdb].[dbo].[Table1].[YEAR])NULL803,6248431186,18788[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW11 |--Clustered Index Scan(OBJECT:([Testdb].[dbo].[Table1].[PK_Table1]), ORDERED FORWARD)154Clustered Index ScanClustered Index ScanOBJECT:([Testdb].[dbo].[Table1].[PK_Table1]), ORDERED FORWARD[Testdb].[dbo].[Table1].[YEAR]1,449936E+0774,588317,9747291182,56304[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW11
Now, with another index IX_Hits on hits and the same sql query, sql server now takes IX_Hits instead of PK_table1. And, it takes more time. Any idea why?
select Year from dbo.table1 group by Year110NULLNULL1NULL4NULLNULLNULL85,54985NULLNULLSELECT0NULL |--Sort(DISTINCT ORDER BY:([Testdb].[dbo].[Table1].[YEAR] ASC))121SortDistinct SortDISTINCT ORDER BY:([Testdb].[dbo].[Table1].[YEAR] ASC)NULL40,011261260,0001374511185,54985[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW01 |--Parallelism(Gather Streams)132ParallelismGather StreamsNULLNULL800,028507491185,53845[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW11 |--Hash Match(Partial Aggregate, HASH:([Testdb].[dbo].[Table1].[YEAR]), RESIDUAL:([Testdb].[dbo].[Table1].[YEAR] = [Testdb].[dbo].[Table1].[YEAR]))143Hash MatchPartial AggregateHASH:([Testdb].[dbo].[Table1].[YEAR]), RESIDUAL:([Testdb].[dbo].[Table1].[YEAR] = [Testdb].[dbo].[Table1].[YEAR])NULL8049,63581185,50995[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW11 |--Index Scan(OBJECT:([Testdb].[dbo].[Table1].[IX_Table1_Hits]))154Index ScanIndex ScanOBJECT:([Testdb].[dbo].[Table1].[IX_Table1_Hits])[Testdb].[dbo].[Table1].[YEAR]1,449936E+0727,899427,9747291135,87415[Testdb].[dbo].[Table1].[YEAR]NULLPLAN_ROW11
I have created a very simple table. Here is the script:
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[IndexTable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[IndexTable]
GO
CREATE TABLE [dbo].[IndexTable] ( [Id] [int] NOT NULL , [Code] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ) ON [PRIMARY]
GO
CREATE CLUSTERED INDEX [CusteredOnCode] ON [dbo].[IndexTable]([Id]) ON [PRIMARY]
GO
ALTER TABLE [dbo].[IndexTable] ADD CONSTRAINT [PrimaryKeyOnId] PRIMARY KEY NONCLUSTERED ( [Id] ) ON [PRIMARY] GO
The records that i added are:
Id Code
1 a 2 b 3 aa 4 bb
Now when i query like
Select * from IndexTable
I expect the results as:
Id Code
1 a 3 aa 2 b 4 bb
as i have the clustered index on column Code.
But i m getting the results as:
Id Code
1 a 2 b 3 aa 4 bb
as per the primary key order that is a non clustered index.
But when I tried to input my data like 'abc', '123 abc' 'abc ','123 abc'
SQL server won't recognize 'abc' and 'abc ' is a different value if the last character is a space. Is there a way to make it as a different value? I tried to drop the primary and input the data. When I ran a group by the name column, 'abc' show 2 instead of 1. Seems SQL server is trying to ignore the space at the end too.
I also noticed unique index have the same problem too. Please help.
I have a table with plant types and plant names. Certain plants are grouped on a custom field, currently called Field. I am trying to create a query that will give me a result set containing the primary order on Type, but need items with the same 'Field' value grouped by each other.For example, the following shows a standard query result with "order by Type", ie select * from plants order by Type
Code: ID Type Name Field 1 Type1Name1(group1) 2 Type2Name2(group2) -group2 3 Type3Name3(group3) 4 Type4Name4(group4) 5 Type5Name5(group2) -group2 6 Type6Name6(group6)
But I want it to look like this, with fields of the same value located next to each other in the result set (but still initially ordered by Type)
