Sync Database Data Between PCs
Mar 24, 2008
I'm working on an application that will be running on two or more machines. Each machine is logging data to a local SQL Compact database. I would like to make these two computers sync the data with eachother, but I am unsure what the best method is to transfer data between machines in a table format. I think XML would work well, but there may be something easier, so I thought I'd ask. Do I want to use sockets to do this, or is there another type of connection that would work better?
All PCs will know the IP addresses of their peers. I forsee each PC having a server thread that is listening all the time. Each PC also has a client that checks to see if it can connect to the server on the other side. It then requests certain data, which the server part sends. Does this sound right?
The rest of the app is in Visual Basic 2008 Express.
Thanks,
Lance
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Mar 30, 2004
hello everyone,
i am developing a application using C#and .NEt compact framework.
for that i need to sync pda data (in xml format) with the remote database server(SQL) and vice versa.
please help me out
thanks in advance.
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Jul 21, 2014
I've stepped into a new environment and have never dealt with multiple data files on user databases only with Temp db.What would be the best way to get all my data files in sync. I have done this on databases that aren't that big in size or off in size by a lot. Here is what I have
Mdf -- 69 GB
ndf -- 3
ndf -- 3
ndf -- 3
ndf -- 3
ndf -- 4
ndf --4
ndf -- 2
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Feb 20, 2003
hi,
we currently have a web server/db on-site and a similar backup machine across the country. we're using a pretty bad backup strategy. we zip up a backup file, thats done on the main server every night, then ftp over to the back up server then run a restore.
lately ive been having problems with the main server. i would like to have the machines sync'd up as close as possible.
ive searched the threads and noticed replication and log shipping to be the most practical, but im assuming most of the machines are on the same domain.
what would be my best bet for machines connected over the internet, no vpn?
also the db on the main machine get queried/inserts all day from 7am - 6:30pm
thoughts?
thx
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Jan 17, 2008
I want to synchronize two databases. Is there a query or a tool to synchronize them?
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Feb 11, 2008
I have two databases data1(Express 2005) and data2( Enterprise 2005). Data1 is a subset of Data2. Now beginning from that state any changes to either database should be reflected on both of them.
Now what's my best solution to accomplish this considering one is the subset of other??
Thanks
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May 10, 2007
Hi,
i am working with windows mobile Cf 2.0 and desktop. i got problem when i were trying to synd mobile database and ms-access database.
my requirement is online i want to transfar data records from mobile to desktop vice versa.
but how? i dont knwo any body would like to guide me.
i am ready to accepting yours valuable views.
waiting
bye
Rajat.
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Dec 23, 2006
Hi
Scenario: In general user will take database backup from database server to local system. User perform some changes to his local database based on his requirement. Again user connects to database server and click on update, local database should update to server database by informing each record status to the user. ex: record 1 updated / call closed do you want to update?
Here local database is going to be Pocket pc database and server database is on SQLDatabase. Can any one suggest best way to implement this feature in Windows Pocket pc, c#. I would appreciate your reply.
Thanks,
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May 12, 2007
hi.
I have two database( one on local system and another on my host ) there are same in table and stored procedure. i just want to sync data between there in my application ( ...on button on click event ! ). please help me to do it. tnx
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Oct 15, 2007
SQL Database Schema Sync
We have development and production databases, when we change database schema in development database how can I synchronize it to production without creating data problems in production, is this possible in SQL2005? Or any external tool I can use?
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Apr 13, 2006
I need to keep the data in my development server and production server in sync.....What is the best way to do this?Remember for example development data may have some addition columns in a table which may not exist in production.....Pls let me know how can i achieve this.
I cannot apply backups because i will loose the ongoing development ....
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Jul 23, 2005
Hi,We are going to be running two SQL Server 2000's from the samephysical server, with Windows Server 2003, and I need to have certaintables between them syncronized. Database A is a backend to a website anddatabase B is going to be used by a different department. Both thedatabases have certain data in common but it isn't stored in the sameformat. I can't just auto sync one with the other, the data (records) hasto be manipulated before updates between them can take place.So, what I need to do is convert certain data when A is updated and tranferthat to B and vice-versa, in real-time. I've looked at Snapshot, thatisn't an option. I imagine some kind of Event Driven API is needed, wheredo i being?TIA
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Jul 20, 2005
Ok..here is my problem. I have two SQL servers that I need to haveidentical, at least semi-real time data on. One is in a public DMZwith full access to and from the internet, and one is behind acorporate firewall and the box can get out to the internet but cannotbe hit directly from the internet in. The two are on seperatenetworks and cannot be connected via lan. Is there a way for me tohave semi-real time data transfers between the two to keep bothservers identical? I have thought that the server behind the firewallcould initiate an XML session with my dmz sql server and processupdates, but I am unfamiliar with how it would know what has changedon the remote server and how the remote server would know what haschanged on the server behind the corporate firewall. Any good ideas?ThanksDan Hirsch
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Sep 29, 2006
Dear all,
I have a software written in C#, using RDA to sync access database from desktop. But it is tricky that some time during "Pull" data from SQL Server Agent, my PDA tell me "A request to send data to the computer running IIS has failed. For more information, see HRESULT".
This also happening when I try to unplug the ethernet cable from my desktop however the push and pull actions did not required to go through internet.
Here are part of my codes
m_intdb = new SqlCeRemoteDataAccess("http://desk01:1024", "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\inttemp.mdb; Jet OLEDB:System Database=C:\Documents and Settings\user\Application Data\Microsoft\Access\System.MDW");
m_intdb.InternetUrl = "http://desk01:1024";
m_intdb.LocalConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\inttemp.mdb; Jet
OLEDB:System Database=C:\Documents and Settings\user\Application
Data\Microsoft\Access\System.MDW"";
m_intdb.Pull("pulltest", "SELECT * from pullTest", "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\inttemp.mdb; Jet
OLEDB:System Database=C:\Documents and Settings\user\Application
Data\Microsoft\Access\System.MDW", RdaTrackOption.TrackingOff, "Err_PullTest");
and the error message look like
A request to send data to the computer running IIS has failed. For more information, see HRESULT.
Please help me solve this problem
Best Regards
Tony Lam
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Dec 23, 2004
I have 3 SQL databases: A, B and C. A and B are branch databases while C is the central (HQ) database. A & B will be constantly updated while C will updated occasionally and usually will be used for reporting/data browsing. Even though A & B are from different branch, they do have share some data records.
Every day, I will have to sync A & B's new/updated data to C and C to A/B. I know I can use Replication but I can't. You see, A & B are located in our own branch server while C was hosted on a third-party server. The webserver provider for C would not allow me to do any Replication on C.
What other alternatives that I can use to synchronise all 3?
DTS? XML transfer? It looks as if I have no choice but to write my own sync scripts? :((
Anyone has encountered similar situations? Any recommended SQL Tool programs?
Please help. I'm at a loss of what Im going to do.
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Mar 28, 2008
thanks 4 ur rpl..well i have a simple doubt if u can guide me it will b gr8 help..well i am developing an application of location based services, in which i am going to store my data on SQLserver 2005 and will fetch the data from it when the user logs in to the user's PDA device so that a user can work offline on the data when there is no connection and when he gets the connection he can synchronize the data with SQLserver 2005. so now i m confuse whether i should use the merge replication or ado.net synchronization framework or RDA?what is the difference between merge replication and synchronization and which is better?
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Sep 28, 2006
Dear All
Iam receiving an error message when trying to complete the subscription. Please find the below given error report that I get from SQL server.
Synchronizing Data (100%) (Error)
Messages
· A call to SQL Server Reconciler failed. Try to resynchronize.
HRESULT 0x80004005 (29006)
The schema script '\MAINsnapshotuncMAIN_SQLMOBILE_TEST20060926133385MembershipData_2.sch' could not be propagated to the subscriber.
HRESULT 0x800704CF (0)
The merge process was unable to deliver the snapshot to the Subscriber. If using Web synchronization, the merge process may have been unable to create or write to the message file. When troubleshooting, restart the synchronization with verbose history logging and specify an output file to which to write.
HRESULT 0x80045017 (0)
The operation could not be completed.
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Oct 9, 2006
Hi Darren & All,
Thanks! As per your guidance, i have tried in the pull method.Now i am getting error "The LocalTablename parameter is already specified".
Coding as follows:
string rdaOleDbConnectString = @"Provider=SQLOLEDB; Data Source=PRASSANAPRASANA;Initial Catalog=master;User Id=sa;Password=master";
SqlCeRemoteDataAccess rda = null;
try
{
rda = new SqlCeRemoteDataAccess();
rda.LocalConnectionString = "Data Source=E:\SampleTest.sdf";
rda.InternetUrl = "http://192.168.1.118/TEst/sqlcesa30.dll";
rda.InternetLogin = "IUSR_PRASSANA";
rda.InternetPassword = "PRASSANA";
rda.Pull("company", "Select * from company", rdaOleDbConnectString, RdaTrackOption.TrackingOn);
MessageBox.Show("Pull Method");
}
catch (SqlCeException)
{
Message.show(ex.message);
}
finally
{
// Dispose of the RDA Object
//
rda.Dispose();
}
}
Please guide me in detail, what mistake i have done in this method.
Thanks ,
Prasanna.
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May 12, 2008
I'm working with a legacy database whose structure I cannot change. I'm building a web-based editor for one of the DB's tables. This table has a Primary Key called "Master_Idx" that is an Identity (autonumber) field.To start, I query the DB and populate a data table which is cached. This is used to "feed" the web form. Any additions, changes, and deletions are reflected in this cached table.The user then has the flexibility to press Save at any time, which ensures that the database is modified accordingly.Here's my question:When new records are added, I assign them a Master_Idx value, the first of which was calculated to be 1 + the Max(Master_Idx) value when the editing session started. But when I insert these records back into the database it's possible that another user might have also been doing similar editing (of different records from the same table), so there's no guarantee that the Master_Idx values in the data table will be identical to those in the DB. When I insert a record from the cached table back into the DB, what technique can I use to check what value was assigned to the Master_Idx? If it's not the same as in the cached table then I need to update it locally in a few places.I hope all of this makes sense but if it doesn't then let me know and I'll explain it in another way.Robert W.
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Mar 14, 2014
How Sync the user and password from my Active Directory, to a SQL Database. Actually, my environment have a database with users and password added, my custom applications uses it like a passport, but now I want to use Active Directory to control these users, but I can't use windows authentication in my old apps. I was reading about Forefront Identity Manager to do this, but I need a free solution. The Sharepoint database sync user credentials with AD?
MCTS Exchange 2010
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Apr 15, 2008
Hello,
I have SQL Server 2000 and 2005 running on the same server. My current system is in SQL Server 2000 and the new system is in SQL Server 2005. My users will be using SQL Server 2000 for the most part, But for the part the processes that have been migrated to 2005, they will be using SQL Server 2005 as well. The database schema is different on both servers eventhough the data will be similar in most respects.
Is there is a way through which any data that is inserted/updated in SQL Server 2000 via content Management System/ manually/ via a batch job, the data is automatically populated in SQL Server 2005 tables or vice versa?
Please advice at the earliest.
Thanks.
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Dec 10, 2005
I need some assistence here.I have two servers. One with MS SQL 2000 Standard edition and MSDE(MSdesktop engine).I need to sync my databases nightly, as a backup.Is there a cheap software that will do this? I don't want to justbackup the entire databases files b/c they are large and I'mtransfering them over DSL.I was thinking transaction logging, but I'm not sure. Is there a easyway to do this?I don't know how to accomplish this task.PLEASE HELP.
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Jun 29, 2015
I have the merge replication (Push)Â for SQL Server 2008.The right-click option for Start and Stop Synchronizing in subscriptions has been disabled. How can I stop the merge replication and start again ?
This error happened 1 week after I created the merge replication. The merge data cannot sync to subscriber and only solution I can use is drop and re-create the merge replication again but error would be re-occur a week later. The merge replication work fine before and start from middle on May 2015, but it keep happen right now.
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Jun 4, 2007
Hi
I want to have an application like a web front end on a pda where customer details can be added into a database. Then later the user connects to the internet and sync the pda database with the database on the server. I want the infomation from the pda database to update the data on the server database.
I know this is a big question but any help would be appreciated.
Many Thanks
Neil
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Feb 8, 2007
HI ,
I Created one database named login.sdf in sql Ce ,i created one table login having two fields (username and password).it is working well.I trying to synchronise these with SQL2000 using Active sync.it is not working ..And one more things ,i tried to connect the default pocket PC 2002 emulator with Active sync.it is also not working.can anybody give some solution for these problem
Thanks in Advance
Regards
Ihsan
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Oct 6, 2006
Hi Everyone,
I have tried the Sync the data from sql server mobile (.SDF) to Sql server 2005 (.mdf).In push command, i am getting the error "Sql Server Everywhere encountered problems when opening the database".
string rdaOleDbConnectString = @"Provider=SQLOLEDB.1;User ID=sa;Initial Catalog=master;Data Source=PRASSANAPRASANNA;Password=master";
qlCeRemoteDataAccess rda = null;
try
{
rda = new SqlCeRemoteDataAccess();
rda.LocalConnectionString = "Data Source=D:/DATABASE/test.sdf";
rda.InternetUrl = http://localhost/Dataset/sqlcesa30.dll;
rda.Push("company", rdaOleDbConnectString, RdaBatchOption.BatchingOn);
MessageBox.Show("Completed");
}
catch (SqlCeException)
{
}
finally
{
rda.Dispose();
}
please guide me any one ours guys to solve this problem .
Thanks
Prasanna.
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Nov 2, 2015
I currently use Access and have found that I need to migrate to SQL Server. I need setting it up.
Currently, I have multiple computers (home, office, laptop, etc.). On each of these computers, I have a folder which syncs via Dropbox. In this folder, I have my Access database which allows me to read/write to the Access database from any computer, and these changes are automatically synced to all the other computers via Dropbox.
I have installed the SQL Server database in the Dropbox folder then installed Management Studio on each computer. But only the computer which did the database install can link to the the SQL Server database. The other Management Studios cannot see the database.
Is there a way to achieve what I am after or is this a limitation of SQL Server? I do not want to have to manage a network or anything.
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May 4, 2007
Hello,
I have set up a merge replication with 4 subscribers and a publisher on SS05 sp2 on 5 window servers. After running my application on the replication with big data for a while, the data in some of tables of subscriber are out of sync from the publisher. I tried to run sp_resyncmergesubscription to fix the problem according to http://doc.ddart.net/mssql/sql2000/html/replsql/replmon_9pwh.htm. The procedure run successfully. However, the problem is still exist.
Does anyone else have this problem. Please help!
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Jun 23, 2007
Hi, I have compact sql databases which will be local on multiple users
devices. Due to space constraints, for one of the tables i have had to use
auto incrementing integer which works fine for the local database but i
would like to merge all of the users databases into a global database. The
table format can be seen below:
Code SnippetCREATE TABLE Players
(
ID UNIQUEIDENTIFIER NOT NULL PRIMARY KEY,
FirstName NVARCHAR(32),
LastName NVARCHAR(32)
);
CREATE TABLE Sessions
(
ID INTEGER NOT NULL IDENTITY,
PlayerID UNIQUEIDENTIFIER ,
SessionDateTime DATETIME,
CONSTRAINT pkSessions PRIMARY KEY (ID),
CONSTRAINT fkPlayerID FOREIGN KEY (PlayerID) REFERENCES Players(ID)
);
CREATE TABLE SessionDetail
(
SessionID INTEGER,
Time real,
Power real,
CONSTRAINT pkSessionDetail PRIMARY KEY (SessionID,StrokeTime),
CONSTRAINT fkSessionID FOREIGN KEY (SessionID) REFERENCES Sessions(ID)
);
The Players table will merge fine as GUIDs are used. However, how will the
sync capabilities of compact SQL handle the sessions table? When it pushes
the local data to the remote database will it change the Sessions.ID column
to a unique field (as no doubt lots of people will have 1, 2, 3 in their
local databases and the global database must have a unique ID), and then
transfer this changed ID back to the local database? Furthermore, if it
changes the Sessions.ID column during the merge it will also need to update
the SessionDetail.SessionID foreign key to maintain referential integrity,
is this also handled?
So my question is, how much of this sync and data merge is automated and are
there any good examples or pointers for my scenario? I cannot reasonably use
a GUID for Session.ID as there will be lots of SessionDetail entries and the
size would be far too much.
Many thanks,
Chris
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Dec 13, 2007
Hi to every one.
For two years i am syncing sucessfully sql server 2.0 datas to sql server 2000 now i want to upgrade to sql server 2005.
I am using Visual Studio 2005 for developing.
Can any one tell the best method available to sync the data from mobile device to sql server 2005.
Also i have os win2003 standard in which i have installed sql server 2005
Does win2003 support mobile device connections with sql ?
Kindly help
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Feb 22, 2008
Hi Forum, Ive been unsuccessfully trying to copy data from one table to another, very simple scenerio!
Table1 ID(PK), FirstName, Mobile, Date.
Table2 FirstName, Mobile.
The first question I have is should I fill Table2 at the insert stage OR should/do I update Table2 from Table1 as the users details are entered. ie create some kind of relationship.
Really appreciate good advice! cheers P
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Apr 18, 2005
I have two db instances on different SQL Servers. One is my test db and the other the prod. db. Each has two tables that hold lookUp values for the entire application. I would like to keep these tables in sync. in both dbs. The prod. db would be the master. I was trying to design a trigger to insert, update, or delete the appropriate records in the test db as they were added or deleted from the prod db.
I'm getting too many prefixes errors on the script when trying to reference the table on the test db using four part naming convention.
Any ideas on how to resolve this issue? Do I need to set up a linked server to accomplish this functionality? If so, how do I setup security for a linked server?
Thanks in advance.
Oscar
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Jan 31, 2000
I have a SQL 7 backup file that I restored onto a new server. All the objects within the database are not owned by dbo, instead they are owned by a db user. When I tried to login to the db it said that it wasn't a valid user. So I added the login to the system. Now when I login it says it is not a valid db user. I have attempted to sync the id's but don't know how. In 6.5 I could run an ad-hoc query to match the SUID's for the system and the database. In 7.0 I can not because the suid for the db is computed. Any ideas on how to sync the user ID's so that I can login to the server using the target db as my default and can query the table with prefacing the owner(I can get in if I give my login SA privelages but then I have to preface all the objects with the owners name)?
Thanks in advance for any help that you can offer.
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