Uninterrupted availability of data in SQL Server

I'm trying to solve a problem my company has in its data warehouse of data availability. We have dozens of transactional databases in production from which we pull data to create a cache of data that we make available to reports for both internal and external
customers.
The problem I'm trying to solve is I want all of the people using the data to still be able to access the previous version of the data (maybe data from an hour ago) while the new data is being refreshed. I have looked at a lot of ways this is possible. From
the very manual, the built in solutions, or a custom drive cloning solution but I'd like to hear from the community what people think is the best way to go about this. The server version is SQL Server 2008, but we could install 2012 in time for this need.
Right now I'm leaning towards AlwaysOn Availability Groups but if there's something better I'd love to know about it.

Thank you for your response. It took a few days but I finally had time to look at the article you linked. Database snapshots look like they are exactly what I need at first, but I read two lines in the article that make me think they may not be.
Under "Limitations of Database Snapshots"
When a page getting updated on the source database is pushed to a snapshot, if the snapshot runs out of disk space or encounters some other error, the snapshot becomes suspect and must be deleted.
And under the section titled "Disk Space Requirements"
Database snapshots consume disk space. [...] Compared to a full copy of a database, however, snapshots are highly space efficient.
A snapshot requires only enough storage for the pages that change during its lifetime. Generally, snapshots are kept for a limited time, so their size is not a major concern.
These two statements seem to say that the snapshot changes as the underlying database changes. I would like a snapshot that remains unchanged while I refresh the underlying database. After which I can refresh the snapshot so that people querying against
the snapshot get data from a version of the database in a state where the refresh is complete. I don't want people to query against incomplete, partially refreshed data.
Is there a way to tell the snapshot to not respect any updates that occur in the source database? Or maybe at least ignore updates for a period of time?
Snapshot does not get updated.. As you update the data,, the snapshot will store the old data in its file and new data will go the actual database.
so, when you create the database snapshot, the snapshot database FILE does not contain any data. as changes happen - the old data is moved to snapshot file and the new data goes to actual database file. it ineeds to keep the old data, so when you query
your database snapshot, it can give your prior data back.
if you want update lot of datas, i do not think snapshot will br good solution. it is good to test something quick and\or where there are less data changes. if you update all the data, your snapshot would end to similar size as the original database.
if this works, you can quickly generate another snapshot and drop the old one. every new snapshot as said, will start from 0 and grows in size as changes happen.
Also you database snapshots are like new databases, you should change your connection strings to point to the right snapshot.
Hope it Helps!!

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Loading data from SQL server 2000 to Oracle using OWB 10.2

Hi All,
I have to move data from SQL server to Oracle using OWB. Any idea how to connect to SQL Server thru the OWB design centre console. There is no detail available in the documentation. OWB cocumentation says that "OWB Integrator for Oracle DB & Apps 3.0" is available to connect to Non-Oracle Database (including Sybase, Informix, ODBC).

Hi,
yes, you can use ODBC and configure HSODBC on the database server to create a database link to the sql-server. If your oracle server is microsoft based you are ready, otherwise you have to buy an odbc-driver for linux, unix or whatever you use.
Ciao Stephan

How can I migrate data from SQL Server 6,5 to Oracle 8?

We have a web site based on Microsoft SQL Server 6.5.Now we plan
to migrate the database to Oracle 8.
We have redesigned the tables structure and created tables under
Oracle 8, so we only need to migrate data from SQL Server.
We've exported data from SQL Server to text files.
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null

Thank you for your reply.
I'll try the Oracle sqlloader utility first.
Regards
Micahel
Oracle Migration Workbench Team wrote:
: Michael,
: Oracle sqlloader is user for this sort of operation, see
: Oracle8i Utilities
: Release 8.1.5
: A67792-01
: available online through Oracle Technology Network.
: The Oracle Migration Workbench can be used to create bcp and
: sqlloader scripts, though since you have altered the schema
these
: scripts would need to be altered by hand after generation.
: Some thought has been put into redesigning table structures in
: the Oracle Migration Workbench, but currently it looks like
this
: reengineering will be left to be done by other tools, eg
Oracle
: Designer, once the SQLServer database has been duplicated with
as
: little change as possible onto Oracle.
: Hope that helps,
: Turloch
: Oracle Migration Workbench Team
: Michael (guest) wrote:
: : We have a web site based on Microsoft SQL Server 6.5.Now we
: plan
: : to migrate the database to Oracle 8.
: : We have redesigned the tables structure and created tables
: under
: : Oracle 8, so we only need to migrate data from SQL Server.
: : We've exported data from SQL Server to text files.
: : How can we import data from files and restore to Oracle
tables.
: : Is there a solution which let us to import data for
particular
: : table columns,not all columns?
: : We'll be appreciated if somene can give suggestions.
: : Regards
: : Michael
: Oracle Technology Network
: http://technet.oracle.com
null

How to load oracle data into SQL SERVER 2000?

how to load oracle data into SQL SERVER 2000.
IS THERE ANY UTILITY AVAILABLE?

Not a concern for an Oracle forum.
Als no need for SHOUTING.
Conventional solutions are
- dump the data to a csv file and load it in Mickeysoft SQL server
- use Oracle Heterogeneous services
- use Mickeysoft DTS
Whatever you prefer.
Sybrand Bakker
Senior Oracle DBA

Loading data from SQL server to Oracle database

i want to create one table in oracle db from table in sql server. Table is huge it got 97,456,789 records.
I created db link (HS) in oracle database which is pointing to sql server. i can select that table from oracle thru db link.
select * from "dbo"."t1@dblink;
i fired below create table.
create table t2 nologging parallel (degree=3) as select * from "dbo"."t1@dblink;
and its taking long time.... but its running...
is there any alternate method to do this and and populate table in oracle db faster.
Please advise. thanks.

vhiware wrote:
create table t2 nologging parallel (degree=3) as select * from "dbo"."t1@dblink;
and its taking long time.... but its running...I doubt that parallel processing will be used as this is unique to Oracle (using rowid ranges typically) and not SQL-Server.
is there any alternate method to do this and and populate table in oracle db faster.Part of the performance overhead is pulling that data from SQL-Server to Oracle across the network link between them. This can be sped up by compressing the data first - and then transferring that across the network.
For example: using +bcp+ to export the data on the SQL-Server box to a CSV file, compress/zip the file, scp/sftp the file to Oracle, and then unzipping it there. Parallel and direct load processing can now be done using SQL*Loader to load the CSV into Oracle.
If this is a Linux/Unix base system, then the unzip/decompress process can be run in parallel with the SQL*Loader process by creating a pipe between the two - where the unzip process writes uncompressed data into the pipe and SQL*Loader reads and loads data as it becomes available via the pipe.
Alternatively, you can do you own PQ processing. Let's say the data is date ranged. You can create a procedure on Oracle that looks something like this:
{code}
create or replace procedure CopyDay( day date ) is
begin
insert /*+ append */ into local_tab select * from remote_tab@remotedb where col_day = day;
-- add logging info, commit, etc.
end;
{code}
You can now start 10 or more of these for different days and run it in the background using DBMS_JOB.

Always on Availability on 2 different SQL Server clusters

SQL Server 2012 EE on WIndows 2008 R2.
Is it possible to have Always on Availability on 2 different SQL Server clusters ?. Could 2 SQL Server clusters be on 1 Windows server failover cluster (WSFC) ?. We have a Prod domain and DR01 domain with 3 nodes SQL Server clusters each. How can we setup
Always On Availability groups on these clusters to make replica of Production databases on the Prod to DR01 domain cluster ?. What do we need to do to get this working ?...................Thanks.

DCarlos unfortunately the requirement for AlwaysOn Availability Groups are a Single Domain, A single WSFC. The WSFC in multiple sites is supported with either a stretched VLan or multiple Subnets.
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Thanks
Warwick Rudd (MCM - SQL 2008 | MCT)
(SQL Masters Consulting |
My SQL Server Blog | Twitter)

Exporting data from SQL Server database to Oracle database

Hello All,
We need to replicate a table's data of SQL Server database to Oracle database.
Can this task be accomplished using Import/Export wizard or Linked servers?
Can help me regarding which Oracle data access components should i download to do this?
I am using SQL Server 2012.
And i have Oracle 11g release 2 client installed in my system.
Thanks in Advance.
Thanks and Regards, Readers please vote for my posts if the questions i asked are helpful.

Yes you can definitely transfer data from SQL server to Oracle Have a look at below links
Export SQL server data to Oracle Using SSIS
Use OLEDB data provider to transfer data from SQL server to Oracle
Using Import Export Wizard
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Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it.
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Error while exporting data from sql server to excel

Hi,
I am trying to export data from sql server to excel.
The query that I used is s follows
INSERT INTO OPENROWSET( 'Microsoft.Jet.OLEDB.4.0', 'Excel 8.0;Database=C:\Folder1\abc.xls','select * from [Sheet1$A1:IV65000]')
select
column1,column2.... from Table1
I get the following error message while doing so..
String or binary data would be truncated.
The statement has been terminated.
One of the column's holds data more than 225 characters.
What is the way to correct this, i want the whole data of the colum in the excel sheet.

I haven't had great luck with the INSERT INTO OPENROWSET method. Can you try one of the many samples from one of these 3 links?
http://www.excel-sql-server.com/excel-sql-server-import-export-using-vba.htm#Excel%20Data%20Export%20to%20SQL%20Server%20Test%20Code
http://www.mssqltips.com/sqlservertip/1540/insert-update-or-delete-data-in-sql-server-from-excel/
https://www.simple-talk.com/sql/database-administration/getting-data-between-excel-and-sql-server-using-odbc--/
Knowledge is the only thing that I can give you, and still retain, and we are both better off for it.

Error while reversing data from SQL Server to ODI

hi,
I was reversing data from SQL Server Java 1.6_022 in ODI Java 1.5, I was getting error Version Mismatch and I updated ODI Java version to 1.6_022.
And now, I am getting the below error while reversing the data from SQL Server database.
0 : 08001 : java.sql.SQLException: No suitable driver
Looking for the assistance on the same.
Thanks,
Abhay

If everything is fine the reversing should be fine. I would say check again if the Technology of the Model and the also the dataserver is created under the right Technology in topology too.
also if this doesn't help , Please tell us the steps you have carried so far . Also can you try selective reverse is it showing the tables.

How to retrieve Min(startDate) and Max(endDate) for different groups of data? (sql server 2000)

My sample dataset (below) contains 3 groups -- 'a', 'b', 'c'. I need to retrieve the Min(startDate) and Max(EndDate) for each group so that the output looks something like this (date format not an issue):
fk   minStart      maxEnd
a    1/13/1985    12/31/2003
b    2/14/1986    12/31/2003
c    4/26/1987    12/31/2002
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create table #tmp2(rowID int Identity(1,1), fk varchar(1), startDate datetime, endDate datetime)
insert into #tmp2
values
('a', '1/13/1985', '12/31/1999'),
('a', '3/17/1992', '12/31/1997'),
('a', '4/21/1987', '12/31/2003'),
('b', '2/14/1986', '12/31/2003'),
('b', '5/30/1993', '12/31/2001'),
('b', '6/15/1994', '12/31/2003'),
('b', '7/7/2001', '12/31/2003'),
('c', '4/26/1987', '12/31/1991'),
('c', '8/14/1992', '12/31/1998'),
('c', '9/10/1995', '12/31/2002'),
('c', '10/9/1996', '12/31/2000')
Thanks
Rich P

Rich
It is unclear what you are trying to achieve, you said that it is SQL Server 2000 but provide a sample data with SQL Server 2008 syntax
Is it possible to use UNION ALL for your queries to make its one
select * from
select * from #tmp2 t1 where exists
(select * from (select top 1 * from #tmp2 t2 where t2.fk = t1.fk order by t2.startdate) x where x.rowID = t1.rowID)
UNION ALL
select * from #tmp2 t1 where exists
(select * from (select top 1 * from #tmp2 t2 where t2.fk = t1.fk order by t2.Enddate desc) x where x.rowID = t1.rowID)
as der order by fk
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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How to compare 2 dates in SQL Server 2000 DB using Java?

How do you compare 2 dates in SQL Server 2000 DB using Java?
Let's say we have two fields: Date Reported and Target Finish Date.
Date Reported is 09-10-2004 09:55:55: PM
Target Finish Date is 09-12-2004 11:59:59: PM
What i want to happen is i want to convert both dates to days and get the difference of the two.
can SQL Server 2000 DB do this?

it doesnt wrk.
ok here's what i did:
iv tested a simple code for this case.
I created a table name tblDate which has 3 columns namely date_ID, date_From (datatype datetime), date_To (datatype datetime).
I inserted 1 row: date_ID has the value 1, date_From has the value 10/22/2004, and date_To has the value 10/24/2004.
i run the java code below:
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an error occurred: Error on Execution: java.lang.nullpointerexception

Extract the data from SQL Server and Import into Oracle

Hi,
I would like to run a daily job that will export the table data from SQL server table (it will be only one or two table) and Import back into Oracle table (it might one or two table tables).
Could you please guide me that how can i do this using either sql server or oracle?
We have oracle 9.2 and sql server 2005.
Normally i do from flat file which is generated by source destination nand i dump into oracle using sql*loader but this time I have to directly extract/export the data from MS Sql server and load into Oracle table, mostly it will reload so i might doing any massaging data during the load.
If you show me the detail approach, it will be really appreciated.
I have access to Sql server but i don't how to use sql server to do this or using oracle as a daily job even becuase have to schedule the job for this as it will be a daily job.
Thanks,
poratips

Unless you can find an open source ODBC driver for SQL Server that runs on Solaris (and I wouldn't be overly hopeful there) Heterogeneous Services would require that you license something-- a third party ODBC driver, a new Oracle instance, or an Oracle Transparent Gateway.
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Using Oracle Forms Importing Data From SQL Server into Oracle Tables.

Dear All,
We are using Oracle Forms 10g in windows XP and having OAS 10g and Oracle database 9i.
How can we import data from SQL Server 2005 into Oracle tables using Oracle Forms?
Thanks & Regards
Eidy

I have no idea what "Oracle Hetrogenius Services" is, so I can't help you with that, sorry.
SQL Developer might also assist you. SQL Developer can connect to SQL Server as well as Oracle and has some tools for migration. See the documentation for details:
http://download.oracle.com/docs/cd/E12151_01/doc.150/e12156/toc.htm
For additional help on using SQL Developer for this task, please consult Support or the SQL Developer forum: SQL Developer
Hope this helps,
Jacob

Importing Data into Sql Server 2012 from Excel Data

Hi,
I got errors like this when i am doing import data into sql server from excel Data. Can you please help us?
- Executing (Error)
Messages
Error 0xc020901c: Data Flow Task 1: There was an error with Source - demotable$.Outputs[Excel Source Output].Columns[Comment] on Source - demotable$.Outputs[Excel Source Output]. The column status returned was: "Text was truncated or one
or more characters had no match in the target code page.".
(SQL Server Import and Export Wizard)
Error 0xc020902a: Data Flow Task 1: The "Source - demotable$.Outputs[Excel Source Output].Columns[Comment]" failed because truncation occurred, and the truncation row disposition on "Source - demotable$.Outputs[Excel Source Output].Columns[Comment]"
specifies failure on truncation. A truncation error occurred on the specified object of the specified component.
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Error 0xc0047038: Data Flow Task 1: SSIS Error Code DTS_E_PRIMEOUTPUTFAILED. The PrimeOutput method on Source - demotable$ returned error code 0xC020902A. The component returned a failure code when the pipeline engine called PrimeOutput().
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(SQL Server Import and Export Wizard)

Are you attempting to import into a newly made table or into an existing table? It looks like it's trying to insert data where it cannot be inserted (invalid column or lack of data size in your column).
Try the following:
1). In your excel sheet, highlight the whole sheet and make sure the cells are in 'text' form and try re-importing
2). save the document as ms dos TEXT and import as a text document.
3). double check your columns are correct for the data, for example if you have a column that has a string of 100 characters and your column is 'NvarChar(90)' - that might cause the error? Or just correct data type in your column
3). If that doesn't work and you're inserting into a new table, try importing it as string first and writing a query to insert columns that should be float/integer or whatever. You may want to convert float texts to a 'bigint' first rather than string
> float as that can cause problems if I remember correctly.

Does SSIS guarantee that it loads the data into SQL Server in the same order as it is in Excel

Hi,
We are trying to load several Excel files into SQL Server SSIS and we need to save the data in the database in the same order as it is in Excel..
My question is, Does SSIS guarantee that it loads the data into SQL Server in the same order as it is in Excel. If so, we will add a sequence to ensure we have the order.
Please advise.
Thanks & Regards,
Dhanumjay

Thanks for your response.
If it is one file then we can add an index column, but we have to load hundreds of files.
How adding an index/key column to the table works unless SSIS picks and loads the data in the table in the same order as it is in Excel?
Just to explain my question better,
If excel has three rows {a,b},{c,d},{e,f}, does SSIS ensure it loads the data in the same order in a table.
Thanks.

Uninterrupted availability of data in SQL Server

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