How Quickly Does RAID10 Format?
Mar 20, 2007
We have a server with some pesky RAID5 - which has on 3 separate occasions corrupted the Databases when a drive failed. So we had a maintenance window and decided to change it to RAID10.
We started the configuration at 13:00 today, its now 18:00 and it has done 25% ... is that normal?
Its 8 disks (so 4 mirror-pairs), it will have around 300GB of usable space when its done.
What would happen if we needed to do this in a time critical window? (for this debacle we have moved the database onto the Web Server, so we can survive for a few more hours ...)
Kristen
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Apr 23, 2008
I have a database with a couple of tables i need to expand to 4 gigabytes in order to run some tests. (currently 300 megs)
Does anyone have a script or some method that would quickly populate my tables with random data so that i can grow my database to the desired size for testing.
Thanks
I have SQL server 2005 express. I have the management studio installed too.
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Jun 15, 2007
Hi, All:
I know oracle SQL, now I need to do a lot of SQL query on Microsoft SQLSERVER, can any one point out any place that I can find out the syntax of SQLserver SQL statement? Since this is just a short term assignment, so I don't want to buy a book, just hoping I can learn something quickly from online. I don't need learn anything deep, just need to know some simple syntax so I can do join, count, concatenate, min(), max(), sum () etc.
thanks in advance.
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Oct 22, 2007
I am trying to search for stored files "for example from date: 15/12/2003 to: 24/6/2006" and when i press search no results appeare the following is the database code:
1 public DataTable searchData(string fileNo, string Title, string dFrom, string dTo, string brief)2 {3 string str = "";4 5 str = "select * from Tb_File where Active = 1 ";6 7 if (fileNo != "")8 str += " and FileNo='" + fileNo + "'";9 if (Title != "")10 str += " and Title like '%" + Title + "%' ";11 if (brief != "")12 str += " and Brief like '%" + brief + "%' ";13 if (dFrom != "")14 str += " and DFrom >= convert(datetime,'" + Convert.ToDateTime(dFrom).ToShortDateString() + "',103) ";15 if (dTo != "")16 str += " and DTo < convert(datetime,'" + Convert.ToDateTime(dTo).ToShortDateString() + "',103) ";17 18 ole.Open();19 SqlDataAdapter DA = new SqlDataAdapter(str, ole);20 DataTable DT = new DataTable();21 DA.Fill(DT);22 ole.Close();23 return DT;24 25 }
i am using sql 2000, with Visual Studio 2005.
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Mar 26, 2007
Good day,
I have a table of approximately 10 million rows. The table has 3 field making up the key, namely:
ID, Date, Program
I need to extract all the distinct Program's from the table.
I have don so with:
Select distinct Program from table
This unfortunately takes roughly 2 minutes which is far to long. Is there something I can do to help speed this process up?
Thanks in advance.
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May 19, 2004
There have been several threads about changing a database's collation but none have come up with an easy answer before.
The suggestion before was to create an empty database with the correct collation and then copy the data across.
However this is hard work as you have to populate tables in a specific order in order not to violate foreign keys etc. You can't just dts the whole data.
There follows scripts we have written to do the job. If people use them, please could you add to this thread whether they worked successfully or not.
Firstly we change the default collation, then change all the types in the database to match the new collation.
===================
--script to change database collation - James Agnini
--
--Replace <DATABASE> with the database name
--Replace <COLLATION> with the collation, eg SQL_Latin1_General_CP1_CI_AS
--
--After running this script, run the script to rebuild all indexes
ALTER DATABASE <DATABASE> COLLATE <COLLATION>
exec sp_configure 'allow updates',1
go
reconfigure with override
go
update syscolumns
set collationid = (select top 1 collationid from systypes where systypes.xtype=syscolumns.xtype)
where collationid <> (select top 1 collationid from systypes where systypes.xtype=syscolumns.xtype)
go
exec sp_configure 'allow updates',0
go
reconfigure with override
go
===================
As we have directly edited system tables, we need to run a script to rebuild all the indexes. Otherwise you will get strange results like comparing strings in different table not working.
The indexes have to actually be dropped and recreated in separate statements.
You can't use DBCC DBREINDEX or create index with the DROP_EXISTING option as they won't do anything(thanks to SQL Server "optimization").
This script loops through the tables and then loops through the indexes and unique constraints in separate sections. It gets the index information and drops and re-creates it.
(The script could probably be tidied up with the duplicate code put into a stored procedure).
====================
--Script to rebuild all table indexes, Version 0.1, May 2004 - James Agnini
--
--Database backups should be made before running any set of scripts that update databases.
--All users should be out of the database before running this script
print 'Rebuilding indexes for all tables:'
go
DECLARE @Table_Name varchar(128)
declare @Index_Name varchar(128)
declare @IndexId int
declare @IndexKey int
DECLARE Table_Cursor CURSOR FOR
select TABLE_NAME from INFORMATION_SCHEMA.tables where table_type != 'VIEW'
OPEN Table_Cursor
FETCH NEXT FROM Table_Cursor
INTO @Table_Name
--loop through tables
WHILE @@FETCH_STATUS = 0
BEGIN
print ''
print @Table_Name
DECLARE Index_Cursor CURSOR FOR
select indid, name from sysindexes
where id = OBJECT_ID(@Table_Name) and indid > 0 and indid < 255 and (status & 64)=0 and
not exists(Select top 1 NULL from INFORMATION_SCHEMA.TABLE_CONSTRAINTS
where TABLE_NAME = @Table_Name AND (CONSTRAINT_TYPE = 'PRIMARY KEY' or CONSTRAINT_TYPE = 'UNIQUE') and
CONSTRAINT_NAME = name)
order by indid
OPEN Index_Cursor
FETCH NEXT FROM Index_Cursor
INTO @IndexId, @Index_Name
--loop through indexes
WHILE @@FETCH_STATUS = 0
begin
declare @SQL_String varchar(256)
set @SQL_String = 'drop index '
set @SQL_String = @SQL_String + @Table_Name + '.' + @Index_Name
set @SQL_String = @SQL_String + ';create '
if( (select INDEXPROPERTY ( OBJECT_ID(@Table_Name) , @Index_Name , 'IsUnique')) =1)
set @SQL_String = @SQL_String + 'unique '
if( (select INDEXPROPERTY ( OBJECT_ID(@Table_Name) , @Index_Name , 'IsClustered')) =1)
set @SQL_String = @SQL_String + 'clustered '
set @SQL_String = @SQL_String + 'index '
set @SQL_String = @SQL_String + @Index_Name
set @SQL_String = @SQL_String + ' on '
set @SQL_String = @SQL_String + @Table_Name
set @SQL_String = @SQL_String + '('
--form column list
SET @IndexKey = 1
-- Loop through index columns, INDEX_COL can be from 1 to 16.
WHILE @IndexKey <= 16 and INDEX_COL(@Table_Name, @IndexId, @IndexKey)
IS NOT NULL
BEGIN
IF @IndexKey != 1
set @SQL_String = @SQL_String + ','
set @SQL_String = @SQL_String + index_col(@Table_Name, @IndexId, @IndexKey)
SET @IndexKey = @IndexKey + 1
END
set @SQL_String = @SQL_String + ')'
print @SQL_String
EXEC (@SQL_String)
FETCH NEXT FROM Index_Cursor
INTO @IndexId, @Index_Name
end
CLOSE Index_Cursor
DEALLOCATE Index_Cursor
--loop through unique constraints
DECLARE Contraint_Cursor CURSOR FOR
select indid, name from sysindexes
where id = OBJECT_ID(@Table_Name) and indid > 0 and indid < 255 and (status & 64)=0 and
exists(Select top 1 NULL from INFORMATION_SCHEMA.TABLE_CONSTRAINTS
where TABLE_NAME = @Table_Name AND CONSTRAINT_TYPE = 'UNIQUE' and CONSTRAINT_NAME = name)
order by indid
OPEN Contraint_Cursor
FETCH NEXT FROM Contraint_Cursor
INTO @IndexId, @Index_Name
--loop through indexes
WHILE @@FETCH_STATUS = 0
begin
set @SQL_String = 'alter table '
set @SQL_String = @SQL_String + @Table_Name
set @SQL_String = @SQL_String + ' drop constraint '
set @SQL_String = @SQL_String + @Index_Name
set @SQL_String = @SQL_String + '; alter table '
set @SQL_String = @SQL_String + @Table_Name
set @SQL_String = @SQL_String + ' WITH NOCHECK add constraint '
set @SQL_String = @SQL_String + @Index_Name
set @SQL_String = @SQL_String + ' unique '
if( (select INDEXPROPERTY ( OBJECT_ID(@Table_Name) , @Index_Name , 'IsClustered')) =1)
set @SQL_String = @SQL_String + 'clustered '
set @SQL_String = @SQL_String + '('
--form column list
SET @IndexKey = 1
-- Loop through index columns, INDEX_COL can be from 1 to 16.
WHILE @IndexKey <= 16 and INDEX_COL(@Table_Name, @IndexId, @IndexKey)
IS NOT NULL
BEGIN
IF @IndexKey != 1
set @SQL_String = @SQL_String + ','
set @SQL_String = @SQL_String + index_col(@Table_Name, @IndexId, @IndexKey)
SET @IndexKey = @IndexKey + 1
END
set @SQL_String = @SQL_String + ')'
print @SQL_String
EXEC (@SQL_String)
FETCH NEXT FROM Contraint_Cursor
INTO @IndexId, @Index_Name
end
CLOSE Contraint_Cursor
DEALLOCATE Contraint_Cursor
FETCH NEXT FROM Table_Cursor
INTO @Table_Name
end
CLOSE Table_Cursor
DEALLOCATE Table_Cursor
print ''
print 'Finished, Please check output for errors.'
====================
Any comments are very welcome.
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Mar 6, 2008
I am very new to SSIS. Can someone give me a basic out line to this problem. I kind of understand control tasks, data flow, etc... but not in details(watched couple of webcasts). I need to see something like below in action to understand this better.
Basically, I need to process a flat csv file on daily basis and load it into a table. As I am loading the records, I will need to verify(on a key column) to see if record exists in table already. If so then just update the record otherwise insert a new record. When I find a record, I need to possibly do a checksum on a set of columns before I do update. So, only update if these set of columns are different from file vs. table. I also need to keep performance in mind as I am processing this record one at a time looking up this record. I am thinking this should be fairly easy but I am getting little lost in control tasks and dataflow as to what goes on what. By the way I am using visual studio 2005 and sqlserver 2005.
I would appreciate your help. thanks again. I dont mind an example solution file.
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Jul 10, 2007
I have five small tables that I need to insert to a SQL CE database.
I am using the 2.0 Compact Framework with the 2.0 System.Data.SqlServerCe.
My table definition is dynamic so I never know it's design.
1- If I go Row by Row using an this.ExecuteNonQuery(_global, par); it takes about 26 seconds to insert 5 tables of 330 rows.
2- If a use
StringBuilder sbColumns = new StringBuilder();
foreach (DataColumn dc in table.Columns)
{
if (sbColumns.ToString() != "")
sbColumns.Append(",");
sbColumns.Append(dc.ColumnName);
}
SqlCeDataAdapter da = new SqlCeDataAdapter("SELECT " + sbColumns.ToString() + " FROM " + _tablename, m_con);
SqlCeCommandBuilder cb = new SqlCeCommandBuilder(da);
da.MissingMappingAction = MissingMappingAction.Passthrough;
da.InsertCommand = cb.GetInsertCommand();
da.Update(table);
da.Dispose();
it takes about 46 seconds.
How Can write it faster or is this fastest it can go?
Thanks
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Nov 13, 2000
Good morning one and all,
I need to transfer a database (contining one table) containing over 35 million records from one server to another. I have two options at present :
(a) Use DTS to do the transfer
(b) Copy the mdf file across and sp_attach_db it
Does any1 have a better idea, or does any1 know which of the two methods will be the quickest?
TIA
Gurmi
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Apr 8, 2015
I just did index defragmentation for some databases include MSDB . I notice there are 3 indexes from MSDB database that fragmented quickly ( I did rebuild last nite at 10 PM - > fragmentation level becomes zero but today at 9 am it become 80 % ).The indexes are backupsetuuid, backup media family uuid, backupmediasetuuid. I am thinking to set the fill factor for those indexes = 80 respectively.
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May 1, 2015
This application runs on a SQL Server 2008 R2 database.This application receives messages from an integration module. It has a core table: Table-A. Each message is inserted as 1 row into Table-A. Then when it is processed, that row in Table-A is updated.
There are two environments which are both connected to the same integration. So in both environments, Table-A has exactly the same amount of records inserted and updated. In both environments Table-A has around 80 million rows, with an extra 150,000 rows being inserted and then updated every day.Table-A has 8 indexes. For some reason unknown to me, the 8 indexes fragment really quickly in one environment but not in the other.
e.g. In Environment-1 the index fragmentation ranges from 0 - 19% and this environment has not been re-indexed for over 2 months.BUT a reindex was performed in Environment-2 and only 2 days later the index fragmentation ranges from 72 - 99.93%!
Our DBA has confirmed the re-index in Environment-2 completed successfully and has shown stats before and after the reindex to show that the 8 indexes for Table-A in Environment-2 went down to 0% fragmentation.
My question is, how can the indexes in Environment-2 fragment so much more quickly than the indexes in Environment-1? Both environments are on exactly the same hardware and have exactly the same inbound messages. The database on Environment-1 is actually a clone from Environment-2. The only known differences between the 2 databases is Environment-1 is STANDARD edition - SQL Server 2008 R2 (SP2) whereas Environment-2 is ENTERPRISE edition - SQL Server 2008 R2 (SP1). Could this difference be due to the Service Pack levels or even because one is STANDARD and the other ENTERPRISE?
This is what I have checked so far:
1) In both Environments all 8 indexes have "Set Fill Factor" unchecked and "Automatically recompute statistics", "Use row locks...", "Use page locks..." checked.
2) The "Index Usage Statistics" report in both Environments shows a similar amount of #UserUpdates and #UserScans
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Dec 15, 2006
We have a system that has 35 million conversations piled up. We didn't know to explicitly end the conversation once the processing has completed. Oops. Now, our production box has 35 mm sitting in the table, and we have run into the problem where the amount in sys.conversation_endpoints has exceeded memory and they are being dumped into tempdb, which is killing our disk space, thus bringing the box down. We have fixed the code to end the conversations, but we now have to end the conversations in a hurry. If we select one by one out of the table and end the conversation via END CONVERSATION, it is slow. Very slow. It will finish in a few months. :(
Does anyone know how to get rid of these conversations in a hurry? All of the messages have been applied to our system, so killing the conversations will (should) have no affect on the processed data. Something like a TRUNCATE statement?
Thank you so much in advance,
John Hennesey
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Apr 28, 2008
I am using SQL server to create a rather complicated client database for a nonprofit organization. I have access to an ancient version of the database in Access format, but would rather create a new database from scratch instead of "up-sizing" the old database. Although the old database is mostly useless, it contains a goldmine of names and addresses that I could use to populate the new database that I'm creating. My question is this: Is there any relatively easy way to cut and paste from external data sources into a new SQL database? For example, I would love to just select twenty rows of "first names" from the old database and then paste that into my new table. Can anyone suggest any quick and easy tricks for populating a new database with place-holder content? Thanks!
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Mar 9, 2015
I have a table with hundreds of millions of records and need to update an xml column to null. I do something like this:
UPDATE [Mydb].[MySchema].[MyTable]
SET [XMLColumn] = null
Currently it is taking around 6 hours.
Is there a quicker way to do this?
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Mar 28, 2015
Our system runs a SQL Server 2012 DB, it has a table (table_a) which has over 10M records. Our system have to receive data file from previous system daily which contains approximate 3M updated or new records for table_a. My job is to update table_a with the new data.
The initial solution is:
1 Create a table (table_b) which structur is as the same as table_a
2 Use BCP to import updated records into table_b
3 Remove outdated data in table_a:
delete from table_a inner join table_b on table_a.key_fileds = table_b.key_fields
4 Append updated or new data into table_a:
insert into table_a select * from table_b
As the test result, this solution is very inefficient. Step 3 costs several hours, e.g. How can I improve it?
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Aug 19, 2015
I have created SSRS report which has many overlapping objects, the output in PDF format seems to good but in word format it is not giving the required output.
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Nov 19, 2014
We are migrating data from old DB2 systems to sql server 2012, the DATE FORMAT in those systems is in decimal format with 7 digits. CYYMMDD format.
I need to convert this into DD/MM/YYYY format.
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Jun 15, 2005
I have date coming to one page as a string in the following format"May 4 2005 12:00AM"
I need to query one of my tables using this date in combination of other nondate values. How can I convert this date into valid sql server datetime format before I query a database tables
Please help
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Jun 4, 2015
I have a table which stores date-of-birth in varchar 19861231(yyyymmdd). A view takes this data. I want to store this date as mmddyyyy in the view. How can we achieve this?
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Dec 19, 2007
Hi,
I have a set of csv files and a set of Format Specification files for each of the csv files. I need to convert the csv files into another format of csv files as specified in the Format Specification files. All the columns of the input csv files do not have a mapping with the columns of the output csv files. How can I achieve this using SSIS ? This is an urgent requirement. Please reply asap. Thanks.
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Jun 16, 2006
Hello Expert!
I need help to I translate this data...
Table "LeaveDetail"
StaffNo | StartDate | EndDate | LeaveType |
1 | 23/04/2006 | 26/04/2006 | AL |
2 | 24/04/2006 | 25/04/2006 | MC |
3 | 26/04/2006 | 27/04/2006 | EL |
1 | 30/04/2006 | 02/05/2006 | EL |
Into this format...
|Apr|Apr|Apr|Apr|Apr|Apr|Apr|Apr|May|May|May|May|
StaffNo |23 |24 |25 |26 |27 |28 |29 |30 |01 |02 |03 |04..
---------------------------------------------------------
1 |AL |AL |AL |AL | | ... |EL |EL |EL |
2 | |MC |MC | | |
3 | | | |EL |EL |
Parameter:
Date From e.g. 23/04/2006 to 23/05/2006
Using only query statement...
Is this possible??
TIA
Regards.
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Nov 16, 2006
Hi All,
I am stuck at one place, where I have to convert CSV format file data into SAP IDOC format file. In SSIS we don't have any such SAP adapter (though we have .NET Data Provider for mySAP suite [SSIS SAP Adapter] but this is still not fully supported by Microsoft, plus it doesn't have feature to convert data into IDOC format) that can do this. Can someone here please provide me some pointers on any third party adapters available in market to do this job or if anyone has already developed some custom approach to achieve this task?
Your quick response on this is highly appreciated.
Regards,
Kuldeep Chauhan
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May 4, 2008
dear all can anybody help me soon....
i am using visual studio 2005 webapplication based on sql server 2005 database.
i can get one date from sql using one query.
I am selecting my field based on following code CONVERT(varchar, Oman.Positions.Datum, 9) AS LastUpdate
this case my output is May 4 2008 3:19:45:000AM.....
this output is correct but from this output i want to avoid millisecond part.
ie i want the output like May 4 2008 3:19:45 AM....
how i can do this
regards
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Feb 1, 2008
E.g, i have a store procedure. The start date is long date (4/15/2007 3:00pm). i want to select the start date with a particular date (short date format 4/15/2006). Thanks in advance.
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Nov 27, 2015
I have a table that has a DATE field named. AccountingDate that is in the format YYYY-MM-DD. It's not a VARCHAR field. I simply want to convert this date field into the format MM/DD/YYYY and call it New_Accounting_Date.
I've played with various combinations of CAST & CONVERT but haven't been able to get it to work.
Below is my latest effort which returns the error:
Incorrect syntax near the keyword 'as'
What code would work to return a MM/DD/YYYY value for New_Accounting_Date?
Select GLBATCH.AccountingDate,
convert(GLBATCH.AccountingDate as date),101) AS New_Accounting_Date
from GLBATCH
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Nov 14, 2006
Hi
I am trying get my VB6 application to insert a record into a table (SQL Express) which has a datetime column but it would not process if the data format is differ to *American Date format*.
The date() function in VB returns 15/11/2006 which is in Australian Date format (DD/MM/YYYY) according to my setting in "Reginal and Lanuage Option-> Locale 0> English (Australia)" setting.
I get the following error:
Msg 242, Level 16, State 3, Server KITSQLEXPRESS, Line 1
The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value.
The statement has been terminated.
My computer's locale is set to English (Australia) and I expect the datetime format would follow what is set in system locale
I've read an article somewhere on the net about how SQL 2005 eliminate the confusion of date conversion when read/write datetime records into a table...but it seems to me that it is still as in-flexible as MS Access
Is there a setting in the database that takes care of it?
Thanks
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May 28, 2008
Hi,
I have a column date in my database which I should send it to Oracle database. The Date format in Oracle is number. I don’t know how should I convert the date to that format?
Example :
SQL FormatOracle Format
02/16/05 105046
Thanks.
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Jun 9, 2006
hi siri have table hh .it has two columnsone is hhno is integer datatype another hhdoc is xml data type likehh tablehhno hhdoc---------------------------------------------------------------------------------------------100<suresh>sfjfjfjfjf</suresh>....................................101<ramesh>hhfhfhf</ramesh>..................................how to convert the xml data format into the general data format plshelp me with examples
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Sep 27, 2006
Hi All, I have a serial number field in table. Field type is integer. It is just stored as 1,2,3,12,13, etc.It is showing as 00001,00002,00003,00012,00013 in interface. C# string format is very easy to changed the format.But when i export to excel there is a problem. Let me know how to format string in SQL and export to excel.ThanksAung
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Jul 5, 2002
i am trying to bcp a data file to a sql table that have diffn formats. the conds are as follows -
1]the last 2 columns of the table need to be omitted
2]the first 2 fields of the data file correspond to the first 2 coulmns of the table and need to be imported
3]the last 2 fields of the data file need to be ommitted
the data in the txt file is as follows -
xxxxxxxx~xxxxxxxx~xxxxx~xxxxx
yyyyyyyy~yyyyyyyy~yyyyy~yyyyy
.....
the format file i use is -
7.0
4
1 SQLCHAR 0 32 "~" 1 C_ALIAS
2 SQLCHAR 0 254 "~" 2 C_DESC
3 SQLCHAR 0 0 "" 0 ENABLED
4 SQLCHAR 0 0 "" 0 SECNAME
5 SQLCHAR 0 0 "~" 0 c2_alias
6 SQLCHAR 0 0 "
" 0 C_DESC2
when i try to bcp data in using the format file i get error -
Unable to open BCP Host Data File
Can anyone tell me what i am doing wrong.
Thanks
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Jul 11, 2003
This may be the wrong forum for this question. However, the question is, does any one have used sql server to provide output in CIF format?
Or more basic question, does anyone have worked with CIF file? Does anyone know how to generate the file automatically for sql query result?
Thanks
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Aug 17, 2004
I have access as front end, and sql server as backend, now i need create a query to get some data that user want. But they want CSV format, what is that? After i retrieving the data, how to save to CSV format. Thanks.
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Nov 1, 2004
i'm trying to format integers to have ,s... like 1,000 instead of 1000.
????????????????
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