DB Engine :: Index Key Length Limitation
Nov 24, 2015What is the reason behind Index key length limitation upto 900 bytes?
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DB Engine :: Server 2012 8060 Row Length Limit
Oct 21, 2015SQL Server 2012.If I create a table with 307 columns, all of type nvarchar(50), it works. If I add another column of type nvarchar(50), it works but I get a warning:
Warning: The table "RowSizeError" has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes. INSERT or UPDATE to this table will fail if the resulting row exceeds the size limit.
307 x 50 = 15350 and 308 x 50 = 15400. why I get the warning below with 308 columns but not with 307?
drop table [RowSizeError]
go
CREATE TABLE [RowSizeError](
[F1] [nvarchar](50) NULL,
[F2] [nvarchar](50) NULL,
[F3] [nvarchar](50) NULL,
[code]....
Index Entry Exceeds The Maximum Length
May 29, 2008I'm seeing this error in my application log. Not quite sure how it started happening all of a sudden. I'm not quite sure where to start on this one.
Any suggestions greatly appreciated!
Thanks,
Mike123
Exception information:
Exception type: SqlException
Exception message: Operation failed. The index entry of length 1007 bytes for the index 'tblMessage25' exceeds the maximum length of 900 bytes.
Spaced Used By Col In Index Page Is Total Length Of Col Or Data It Stores In It
Apr 9, 2015i have one col in a nonclusted index which is bigint 8 bytes follwoing result shows min_record_size_in_bytes and max_record_size_in_bytes is 20 that is 12+8 page size is 8 kB. does that mean a record will use 20 bytes in a page or it will only use the space equalent to data stored in the col.what i have seen is page count is same weather i put some data in the col or null
select * From sys.dm_db_index_physical_stats(9,343,null,null,'DETAILED')
database_idobject_idindex_idpartition_numberindex_type_descalloc_unit_type_descindex_depthindex_
levelavg_fragmentation_in_percentfragment_countavg_fragment_size_in_pagespage_countavg_page_
space_used_in_percentrecord_countghost_record_countversion_ghost_record_countmin_
record_size_in_bytesmax_record_size_in_bytesavg_record_size_in_bytesforwarded_
record_countcompressed_page_count
999208304101HEAPIN_ROW_DATA102.9527559055118116253.187540514.196627131208358500016516516500
9992083041141NONCLUSTERED INDEXIN_ROW_DATA202553.21699.3544600938967585000202020NULL0
9992083041141NONCLUSTERED INDEXIN_ROW_DATA2101115.510254509513221600262626NULL0
DB Engine :: Partition Table And Index
Jul 26, 2015 I have one partition table "tablea" with partition key dateentry on yearly basis and table have four partition with name y2013,y2014,y2013,y2015 with one partition schema . How I can create partition index on tablea that first time create partition index and next time I want to rebuild index only on y2015 partition .
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DB Engine :: Index Operation Getting Blocked
Sep 17, 2015Since couple of days, I am getting a very weird problem on my production environment. Basically, any index operation [rebuild, drop] etc. against an index on a table is getting blocked by [Sleeping,Dormant] connections.
Scenario: I have a Table TableX in database DBX on Server X. This table has a Non-unique, non-clustered index on a NVARCHAR column. This table is accessed by SQL written in a store procedures from Server A via a link server. Both the Servers are SQL 2008 R2 edition.
If I try to run any operation on the index, it get blocked by existing session and keeps on getting blocked by different sessions. Yesterday it was blocked for about 13 hours before I killed the session.
Executing sp_WhoisActive shows few sessions with Host Server A without any sql_text. These sessions actually blocked the indesx operation on the ServerX. These sessions always exist. Sessions details are
Status= Sleeping/Dormant
Open_Tran_Count=1
Host=ServerA
Read/Writes=NULL
CPU=NULL
WaitInfo=NULL
I am not sure how to find the sql causing this issue.
DB Engine :: Index Was Outside Bounds Of Array
Sep 16, 2015I need to setup log shipping from a 2008 Standard to a 2012 Standard server. I have not found any restrictions for this, however, when I want to connect to the 2012 server on the add secondary server page, I receive the following error:'Index was outside the bounds of the array. (Microsoft.SqlServer.Smo)'.
View 3 Replies View RelatedDB Engine :: How To Know If Table Has Non-unique Clustered Index
Oct 31, 2015Give a user table ‘MyTable’. How to know whether the table contains a non-unique clustered index by using SQL query?
View 6 Replies View RelatedHow To Force The Query Engine To Use An Index With An OR Clause?
Nov 16, 2007I have the following table:
Create Table Item(
I_Code NVarChar(40) Primary Key NOT NULL,
I_MatID NVarChar(40),
I_Name NVarChar(160),
I_BC nvarchar(20),
I_Company nvarchar(20),
I_CompanyFound nvarchar(20),
I_Info1 nvarchar(55),
I_Acquired nvarchar(35),
I_Info2 nvarchar(55),
I_Info3 nvarchar(55),
I_Date DateTime DEFAULT GetDate()
);
Create Index ind_Item_Name on Item(I_Name);
Create Index ind_Item_BC on Item(I_BC);
Create Index ind_Item_Company on Item(I_Company);
Create Index ind_Item_CompanyFound on Item(I_CompanyFound);
create Index ind_Item_i1 on Item(I_Company,I_CompanyFound);
create Index ind_Item_i2 on Item(I_CompanyFound,I_Company);
Now this query DOES NOT use index:
select I_Name, I_Code, I_MatID, I_BC, I_Company,I_Info1, I_Acquired, I_CompanyFound, 0 as I_Found
from Item
where (I_Company='102' or I_CompanyFound='102' )
While this one use:
select I_Name, I_Code, I_MatID, I_BC, I_Company,I_Info1, I_Acquired, I_CompanyFound, 0 as I_Found
from Item
where (I_Company='102' )
UNION
select I_Name, I_Code, I_MatID, I_BC, I_Company,I_Info1, I_Acquired, I_CompanyFound, 0 as I_Found
from Item
where (I_CompanyFound='102' )
Both return the same rows. Is this a bug? I found the following:
http://support.microsoft.com/kb/223423
Some feedback?
Thanks
DB Engine :: Do System Base Tables Always Use Clustered Index
Nov 4, 2015Just wonder if system base tables always use clustered index? I am using SQL Server 2005 and find sys.sysidxstats base table is using heap, not clustered index. Why?
View 2 Replies View RelatedPerformance Tuning Using Index. How To Force The Query Engine To Use It?
Nov 14, 2007Hello all.
I have the following table
Create Table Item(
I_AssetCode NVarChar(40) Primary Key NOT NULL,
I_Name NVarChar(160),
I_BC nvarchar(20),
I_Company nvarchar(20)
);
Create Index ind_Item_Name on Item(I_Name);
Create Index ind_Item_BC on Item(I_BC);
Create Index ind_Item_Company on Item(I_Company);
It is populated with 50 000 records.
Searching on indexed columns is fast, but I've run into the following problem:
I need to get all distinct companies in the table.
I've tried with these two queries, but they both are very slow!
1. "select I_Company from item group by I_Company " - This one takes 19 seconds
2. "select distinct(I_Company) from item" -This one takes 29 secons
When I ran them through the SQL Management Studio and checked the performance plan, I saw that the second one doesn't use index at all ! So I focused on the first...
The first one used index (it took it 15% of the time), but then it ran the "stream aggregate" which took 85% of the time !
Actully 15% of 19 seconds - about 2 seconds is pretty much enough for me. But it looks that aggregate function is run for nothing!
So is it possible to force the query engine of the SSCE not to run it, since there is actually no aggregate functions in my select clause?
According to SQL CE Books online:
Group By
"Specifies the groups (equivalence classes) that output rows are to be placed in. If aggregate functions are included in the SELECT clause <select list>, the GROUP BY clause calculates a summary value for each group."
It seems the aggregate is run every time, not only when there is an aggregate function.
Is this a bug?
Thanks in advance,
TipoMan
DB Engine :: Run Rebuild Index Task Daily On Database
Apr 28, 2015On our particular database server, we run the Rebuild Index Task (Using classic Maintenance Plan Designer) every night. Running the script below, I saw that about 77 tables had an avg_fragmentation_in_percentage between 80% and 99% !!
SELECT OBJECT_NAME(ind.OBJECT_ID) AS TableName,
ind.name AS IndexName, indexstats.index_type_desc AS IndexType,
indexstats.avg_fragmentation_in_percent
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, NULL) indexstats
INNER JOIN sys.indexes ind
ON ind.object_id = indexstats.object_id
AND ind.index_id = indexstats.index_id
WHERE indexstats.avg_fragmentation_in_percent > 30--You can specify the percent as you want
ORDER BY indexstats.avg_fragmentation_in_percent DESC
I dont understand why these tables are highly fragmented after a daily index rebuild! Unless the users are doing heavy inserts/updates/deletes during the day.
DB Engine :: Check Last Database Index Reorg Date And Time?
May 4, 2015Are there anyway I can check my last database reorg date and time using Tsql ?
View 5 Replies View RelatedDB Engine :: Retrieving Table And Index Object Definitions In Server
Jul 20, 2015I am currently investigating the best way to handle partition swapping where the partition scheme is built on several file groups. In order to swap partitions, both partitions need to be on the same file group. In addition, the file groups and partitions are automatically updated once a month meaning that there is a scheduled job that adds a new file group, file group files, and updates the related partition objects.If I am forced to create a new non-partition table on the same file group as the partition of the target table, what would be the best way to create the target table without hard coding the full table definition and clustered index? I know that I can query the systables and syscolumns views to reconstruct a basic SQL statement to build the table definition and views Is there a SQL Server function that I can use to just give me the object definitions? Unfortunately, the OBJECT_ DEFINITION function doesn't apply to tables or indexes. URL....
View 4 Replies View RelatedDB Engine :: Index Defrag Routine Audit Frag Values
Aug 26, 2015I am currently re-writing an overnight index defrag procedure and would like to audit indexes in my database - logging the before defrag action" avg fragmentation value and "after defrag action" frag value in an audit table. This will be for all databases on the server. I have completed the vast majority of it (cycling though all the databases, detecting which indexes need reorganising or rebuilding and inserting the information into a table) but I cannot get the audit values working properly. For example, a sample row in my audit table would look like this:
ID Name DB Table frag_before frag_after
1 Index2 DB1 Table6 70.33456 0.03
2 Index7 DB1 Table9 45.98 1.2567etc
DB Engine :: In-Memory OLTP Use With Existing Tables / Index / Procedures
Nov 10, 20151. I need to make use of in memory engine for my pr-existed develop procedures ,tables ,index. do I need and code changes for application and how to store tables /indexes in OLTP memory
Assume table index may have primary key index as well.
2. If table with one primary index and 2 foreign constraints, 3 non clusters indexed. which one able o load to memory area and how t do that.
3. In memory is lock free zone. usually locks will happpen in RDMS context . how this works without locks.
DB Engine :: Impact On Database If Stop A Long Running Rebuild Index Job?
Apr 26, 2015We have 3 maintenance jobs configured in this particular DB instance:
Daily backup of system database - SubPlan1 (Check Database Integrity Task --> Rebuild Index Task-->Backup Database Task)Daily backup of user databases - Five subplans for each task : (Check DB integrity --> Rebuild Index -->Backup User Database, Backup Log -->Cleanup History)Weekly maintenance - SubPlan1 (Check Database integrity job (system+user DB) + rebuild index job (system+user DB) )
PROBLEM: I just noticed that the User DB Rebuild Index task has been running since the 03/04 and the Weekly maintenance plan - subplan1 since the 12/04.
Which job is "safe" to stop without impacting the database?
T-SQL (SS2K8) :: Procedure Parameter Length Declaration Less Than Column Length?
Jun 30, 2014is there any way or a tool to identify if in procedure the Parameter length was declarated less than table Column length ..
I have a table
CREATE TABLE TEST001 (KeyName Varchar(100) ) a procedure
CREATE PROCEDURE SpFindNames ( @KeyName VARCHAR(40) )
AS
BEGIN
SELECT KeyName FROM TEST001
WHERE KeyName = @KeyName
END
KeyName = @KeyName
Here table Column with 100 char length "KeyName" was compared with SP parameter "@KeyName" with length 40 char ..
IS there any way to find out all such usage on the ALL Procedures in the Database ?
BlobColumn.GetBlobData() With Data Length &&> Integer Length (32767)
Mar 27, 2008For those of you who would like to reference my exact issue, I'm dealing with the RSExecution SSIS package at the "Update Parameters" data flow task, at the Script Component.
The script tries to split parameter data into name and value. Unfortunately, I have several reports that are passing parameters that are very large. One example has over 65,000 characters all in the normal "¶mname=value&parm2=value..." format.
The code in the script works fine until it gets to one of these very large parameter sets. I have figured out what is causing the issue. Here's some code:
Dim paramBlob as Byte()
paramBlob = Row.BlobColumn.GetBlobData(0, Row.BlobColumn.Length)
The second parameter of the .GetBlobData function takes an INTEGER as its count! Therefore, no matter what kind of datatype I pass to the string that the script will later split, it will be limited to 32767 characters.
THIS IS A PROBLEM!!!
Does anyone know a workaround for this issue? I need all of the parameter data to be reported, and I would hate to have to skip over rows like this. Also, if I'm missing something, please fill me in!
Thanks for your help in advance,
LOSTlover
CommandParameters.length Don't Match Parametervalues.length
Feb 24, 2008I am trying to narrow down this problem. Basically, I added 3 columns to my article table. It holds the article id, article text, author and so on. I tested my program before adding the additional field to the program. The program works fine and I can add an article, and edit the same article even though it skips over the 3 new fields in the database. It just puts nulls into those columns.So, now I have added one of the column names I added in the database to the code. I changed my businesslogic article.vb code and the addarticle.aspx, as well as the New article area in the addartivle.aspx.vb page. The form now has an additional textbox field for the ShortDesc which is a short description of the article. This is the problem now: The command parameters.length is 9 and there are 10 parameter values. Right in the middle of the 10 values is the #4 value which I inserted into the code. It says Nothing when I hover my mouse over the code after my program throws the exception in 17 below. Why is command parameters.length set to 9 instead of 10? Why isn't it reading the information for value 4 like all the other values and placing it's value there and calculating 10 instead of 9? Where are these set in the program? Sounds to me like they are hard coded in someplace and I need to change them to match everything else. 1 ' This method assigns an array of values to an array of SqlParameters.2 ' Parameters:3 ' -commandParameters - array of SqlParameters to be assigned values4 ' -array of objects holding the values to be assigned5 Private Overloads Shared Sub AssignParameterValues(ByVal commandParameters() As SqlParameter, ByVal parameterValues() As Object)6 7 Dim i As Integer8 Dim j As Integer9 10 If (commandParameters Is Nothing) AndAlso (parameterValues Is Nothing) Then11 ' Do nothing if we get no data12 Return13 End If14 15 ' We must have the same number of values as we pave parameters to put them in16 If commandParameters.Length <> parameterValues.Length Then17 Throw New ArgumentException("Parameter count does not match Parameter Value count.") 18 End If19 20 ' Value array21 j = commandParameters.Length - 122 For i = 0 To j23 ' If the current array value derives from IDbDataParameter, then assign its Value property24 If TypeOf parameterValues(i) Is IDbDataParameter Then25 Dim paramInstance As IDbDataParameter = CType(parameterValues(i), IDbDataParameter)26 If (paramInstance.Value Is Nothing) Then27 commandParameters(i).Value = DBNull.Value28 Else29 commandParameters(i).Value = paramInstance.Value30 End If31 ElseIf (parameterValues(i) Is Nothing) Then32 commandParameters(i).Value = DBNull.Value33 Else34 commandParameters(i).Value = parameterValues(i)35 End If36 Next37 End Sub ' AssignParameterValues38 39 40 41
View 2 Replies View RelatedDB Engine :: How To Convert Unique Clustered Index Into Clustered Primary Key To Use With Change Tracking
Sep 4, 2015We are going to use SQL Sever change tracking. The problem is that some of our tables, which are to be tracked, have no primary keys. There are only unique clustered indexes. The question is what is the best way to turn on change tracking for these tables in our circumstances.
View 4 Replies View RelatedIs SQL 2005 Memory Limitation &&<= OS Memory Limitation?
Nov 13, 2006If I install SQL 2005 Standard on Windows 2003 Standard, is SQL limited to 4 gigs of physical RAM?
I'm planning a new system that will run SQL 2005 Standard edition on a Windows 2003 Standard platform. The spec calls for 8 GB of RAM. My experience would lead me to suspect I need to install Windows 2003 Enterprise to take advantage of all the installed memory.
Difference Between Index Seek && Index Scan && Index Lookup Operations?
Oct 20, 2006please explain the differences btween this logical & phisicall operations that we can see therir graphical icons in execution plan tab in Management Studio
thank you in advance
4GB Ram Limitation
Oct 5, 2001Hello:
Does anyone know if there is a way to get SQL 7.0 to recognize 8 GB of RAM? The MS knowledgebase does not list anything usefull. On a test machine we upgraded the os from NT4 to Win2000 Advanced Server and SQL 7 will only recognize 4GB. We could goto SQL2000 but that is not supported with our current apps.
Thanks,
Limitation Of RB?
Jul 13, 2006If there is a need to add a new column to the table, how would you do it to add it to an EXISTING report using RB? I don't want to create a new RB report. I want to add the new column to an existing RB report.
p.s. Anybody knows how to replace a Report Model on the report server when re-deploying it? Currently I manually delete the Report Model and re-deploy it onto the server. Otherwise, it gives me an error for duplicate IDs. Is there a switch that can be turned on? Thanks.
What Is The Limitation Of SQLEXPRESS?
May 4, 2007** For those 20 users (or fewer) who've read http://forums.asp.net/thread/1692306.aspx, I'm sorry that I ask the same question.Like I said above, what is the limitation of SQLEXPRESS, in terms of performance and scability?I'm creating a new webboard application that will replace the old one. I intend it to handle 200 concurrent users + 70000 records (9 years of data)The current system use Microsoft Access, which is reaching it's limit in performance and size. I took a look in the SQL Server product information page : http://www.microsoft.com/sql/prodinfo/features/compare-features.mspx.It didn't tell me what I want, like how many connections it can handle, for example.If there are limitations that might cause my application to not reach the required specification (above), I may need to switch to MySQL. I've no intention buying a licensed SQL Server 2005.Thanks in advance.PS: Why there're so few users viewing my posts? Anyone know a more active forum that may help me?
View 9 Replies View RelatedSql 2000 Limitation
Apr 8, 2002Just wondering how many transaction replication subscriber can a publication
have? thanks!
Xiao
Character Limitation
May 30, 2008I have a column called codeabbreviation and currently the Max character limit is 72. Now I want to decrease it to 35character max but before I do that I want to find all rows in that column that already exceeds the 35character max so that I can clean it up down to 35characters.
What is the proper statement to use so that I can query for rows that exceeds 35characters?
IN Clause Limitation
Jul 23, 2005Does anybody know what is the limit for the number of values one canhave in a list of expressions (to test for a match) for the IN clause?For example,SELECT au_lname, stateFROM authorsWHERE state IN ('CA', 'IN', 'MD')Is there a limit in the number of expressions that can be included inthe list to check for a match to STATE? I know this is a bad example asthere are only 50 states, but my actual query is similar to this, theonly difference being I may have about 1000 values in the 'IN' clauseto test for a match.TIA!
View 3 Replies View Related4 GB Size Limitation
May 1, 2006Hi,
Can somebody tell me if the 4 GB database size limit is per database or for all the databases
Regards
Harish
Fulltext Limitation
Oct 4, 2006Can I get a documentation about full text capacity and limitation like memory utilization, number of catalogs per server, no of rows in each catlaog for SQL Server 2000.
Thanks
Tanweer
Limitation Of Tables In Database??
Feb 8, 2008ok i am using Microsoft sql sever 2005 express edition built in VS 2005....just wanna know that is there any limitations of the no of tables that can be created in the database.......my webpage creates a new table in the database for each user who registers....so if there are more than thousand, millions. users...will the database work properly ????
View 2 Replies View RelatedLimitation On SQL Agent Jobs
Feb 23, 2005Hi Guys,
Can you please advice me on if there is a limitation on SQL agent Jobs. If then how many jobs can SQL server accomedate.
If there is a limit, then is there are any ways to increase it?
I appreciate your quick response.
Thanks