Musing About Dataset And Database Schema Synchronization, Please Comment....
Mar 8, 2008
All- I'm a newbie working on a VWD project. A couple questions arose when attempting to work with a project's dataset and its underlying SQL Server Express database:
Is it true that when changing the schema of a database in SQL Server Express through the VWD Database Explorer, one must take care to manually make parallel changes in the dataset? For example, if you make a relation between two tables in Database Explorer, you must do the same with the counterpart tables in the dataset? For example, I find that if I delete or create a relationship between two tables in the database, I must manually do the same in the dataset.
I have some questions about creating SQL Server CE databases. Based on my experiments and what I've read on these forums, it looks like there are a couple ways to create a database schema. I can edit the database schema via the Server Explorer in Visual Studio, or use an external program like SQL Server Management Studio and somehow convert those files to .sdf files.
I find Visual Studio's built in tools to be cumbersome to use and limited in functionality, and using SSMS seems like a roundabout way of approaching the problem. I understand Microsoft will be releasing better tools with Orcas, but in the meantime, I'm wondering if there are alternative ways to generate database schemas.
For instance, I find Visual Studio's DataSet designer fairly easy to use. The DataSet designer generates schema definitions (.xsd files), and an instantiated DataSet can both read and write schema definitions via Read/WriteXMLSchema. Furthermore, DataAdapter's Fill and FillSchema methods can be used to push a schema from a database to a DataSet. So, can I somehow go the other direction and push a schema from a DataSet to a database? It seems like all the tools are there...
For example, if I create the DataSet schema, could I use a small app to create a new .sdf file, instantiate a DataSet, write the schema from the DataSet to the database, and then save the .sdf file? Or given the generated .xsd file, is there any way to create a SQL database from that?
I have managed to cobble up a VS2005 PPC app that has 10 or so tables in it. Of course when I started binding to the tables in my app, pretty soon I ran into an error I had made defining a datatype for a column in one table. Single instead of string. I have spent most of the day trying to modify something to change this column datatype. No luck.
1. Seems you cannot edit the schema in VS2005 to modify the datatype. After messing around, now the project will not open at all.
2. Cannot get the ADS wizard to go anymore, so cannot make .mdb schema change and pull down updated column/table.
3. Thought SQL Server 2005 had a tool you could just open up a .sdf file and change the schema. No luck. At least no intuitive way showed itself after I installed it.
4. Thought SQL Server Express Editition could open such a .sdf file and modify it so installed it. Again, could not figure out how this works either.
I suppose I could start over from scratch and create a new app datasource/dataset in VS2005, but I have done that so many times before, I am getting crabby thinking about doing it again. There must be a better way??? Isn't there?
Hello,I'm using a typed dataset to access my database (SQL Express); I have a table that returns data, which two fields are null; I'm getting this error:{"Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints."}There are no foreign-key or unique key constraints, so it has to be a non-null issue; I changed the two fields in the table to have a null value of Empty instead of Throw Exception, but I don't understand what the problem is coming from... I'm at a loss.Thanks.
Locally I develop in SQL server 2005 enterprise. Recently I recreated my db on the server of my hosting company (in sql server 2005 express).I basically recreated the tables and copied the data in it.I now receive the following error when I hit the DB:The 'System.Web.Security.SqlMembershipProvider' requires a database schema compatible with schema version '1'. However, the current database schema is not compatible with this version. You may need to either install a compatible schema with aspnet_regsql.exe (available in the framework installation directory), or upgrade the provider to a newer version.I heard something about running aspnet_regsql.exe, but I dont have that access to the DB. Also I dont know if this command does anything more than creating the membership tables and filling it with some default data...Any other solutions/thought on what this can be?Thanks!
Hello everybody!I'm using ASP.NET 3.5, MSSQL 2005I bought virtual web hosting .On new user registrations i have an error =(The 'System.Web.Security.SqlMembershipProvider' requires a database schema compatible with schema version '1'. However, the current database schema is not compatible with this version. You may need to either install a compatible schema with aspnet_regsql.exe (available in the framework installation directory), or upgrade the provider to a newer version. On my virtual machine it work fine but on web hosting i have an error =(What can you propose to me?
I have 2 distributed databases which need to be synchronized at regular basis. I plan to write a service that does it. But I'm just curious how to do the update incrementally. Thanks
I have a website that is running on the intranet and on a notebook. I have a notebook that is not always connected to the internet.. when it is not connected, it will read in some data from a barcode reader; and when it's connected, it will synchronize the data with the db on the intranet.. any idea on how to achieve this?
Hi All, I want to do SQL Server DB Synchronization. The scenario is like this.. DataBase is presently on SQL Server 2005, When end user click on button or on some action event all data to from the server should be fetched & should be saved on client m/c. Afer that when user click on button or on some event, DB should be synchronized. i.e. if there is any change in Server Data, client data should be automatically update... How can i achieve this using C#.. Plzzz Help!!!!!
Once I go to client site (where production DB is located) I want to generate a DataSet (which I am able to do) and compare this DataSet with the DataSet created when I read in the XML file.
## 'read in XML file XMLDataSet.ReadXML(Server.MapPath("xDataDictionary.xml")) ##
There is a unique identifier in the table and XML file called 'FieldID'. What I need to do is compare DataSet (from Production DB) with DataSet from XML file.
If there is a 'FieldID' in the DataSet from XML file that IS NOT in DataSet from ProductionDB I want to insert this node/row into the database.
I was wondering if anyone knows if there is any software available or if it is easy to implement the following.
We are running a SQL Server database locally in house and also have the exact same database running on a hosted webserver. The data changes on both versions of the database daily and what we need to do is figure out a simple easy / cheap way to have the two databases synchronize with each other every evening so that the data is exactly the same every morning.
Hi Guys: I am trying to synchronize my home sqlserver database with a database on my web hosting company. I am not really sure how to go about it, any suggestions?
I am using SQL Server 2000 Ent/Dev edition. I have a 2 identical database in 2 different servers and i'm required to synchronize both database. However, i need to exclude some of the tables in during this process.
I tried to search this forum but can't find any solution. How can i perform the above task? BTW i can't use trigger as i have more than 100 tables.
Hi, I am having this scenario; I have 2 SQL Server 2005 databases, they are basically identical in structure. The first one is used by my web application and the other is by desktop application ... I created the web db for security reasons ,.. i dont want online users to have access to the major backed (desktop db) directly so the web app is writing to the web db ... now, I want to update my major backend as transactions to the web db happen and vice versa to keep the users of both applicaions happy ... Is there a good design patterns for that? I am thinking of using db triggers for this but not sure on the implementation details ... Your help is much appreciated
I'm currently working on a Database Synchronization project and I wondered if anyone had any ideas other than what I've got so far. The context of this project is that we have a central server which stores data for 10 different locations in a consolidated database. Each store contains a replica of that database, but with only data relevant to their own operation.
Store owners can change data at the store level or chain owners can change data at the central level, but for either change the other level has to be notified. I currently have 2 ideas on how to do this.
Note: I am using MS SQL Server 7 for the central, but MSDE (Desktop Edition) for the store levels. So, replication from the store to the server is not available. I think I need to actually code this on my own.
Our company has an enterprize site (a very large one). From time to time we need to make changes in it. In other words, we had to synchronize one database (local where we make all changes) and database on hosting. So, we did it manually (wrote scripts and inserted them in database on hosting). But as the databases grew it became impossible to synchronize everything manually. So we need some tool which could cope with this task. The problem is that, as I know, there are many tools which can do it, but we are tight in time and can't evaluate them all. Please share your ideas on what tool is worth evaluating?
I am not a SQL developer by any means. I have a application to build for a Valet company that will require a laptop on site with no internet connectivity to function locally. There will be about 15 locations that all operate independently. After the day is done, the laptops will connect to the internet and upload all data to a hosted SQL server on the internet for centralized data storage and reporting. After a successful upload, the client database will be purged and start fresh the next day. Should this be doe with MYSql on the client and SQL server at the data center? I have some people recommending Progress database but it is expensive. I am out of my element when it comes to syncing db's so any advise is appreciated. Thanks-
Dear All, I’m having three databases with same data in three different locations. Now three users adding records to the particular databases respectively. I want all the data from server A to be there at aerver B and C. all the updations at server B should be there at Server A and server C. as well as same updations at C also. It is not possible to implement replication as all the servers are at long distance. How can I update every database with the other server’s data? I’d like to update day wise. Is there any tool to generate script on that particular date period? Experts, I think you understood my scenario, please let me know the tools or list of best possibilities for me.
I’m thinking of Incremental backup. Guide me in this scenario.
I have two SQL Server Database, one is at my company and one is at my company's customer. There are two related databases and two related tables in the servers. When I make a change in the table at my database, I want these changes to be done at the other server. I mean the related tables should have the same records all-time. I made a search and found that "Linked-Servers" is a good idea in this scenario. I made a linked server and run the following query in the Query Analyzer;insert into SAMPLE_LINKED_SERVER.SAMPLE_DATABASE.dbo.SAMPLE_TABLE(id,name) Select id,name From MY_SAMPLE_TABLE Where id Not In (Select id From SAMPLE_LINKED_SERVER.SAMPLE_DATABASE.dbo.SAMPLE_TABLE)This query works as I wanted. But I want this process to be done automaticaly without user interaction. Should I use Trigger? Do you suggest using Linked Servers?Or is there any other methods to make synchronization between two SQL Server Database?If I cannot find a good method in SQL Server, then I will be forced to make this synchronization by writing .NET code, but that would be difficult I think. Any suggestion and comment is wellcome.Thanks in advance.
We need an architecture in which one office is in pune and other in mumbai,
principal server is in pune and mirrored in mumbai,
now we need an architecture in which mumbai user will performing read only operation from mumbai server (local server )and write operation in pune server(remote server)
and pune user will be performing read and write operation in pune server(local server)
now when link between pune and mumbai goes down, mumbai users will not be having acess to pune server so at that time mumbai user will not be performing write operation in pune server (local server) and when link goes up we want mumbai server to get updated with pune server.
how this is possible or any other different solution to this, what mandatory is we want mumbai users to perform read operation from mumbai server ONLY.
Just wondering if someone can tell me exactly what is happening during the "synchronizing" phase during db mirroring. Basically I have 2 questions regarding restoring and synchronizing.
1. Assuming there is no initial mirroring setup. A backup is taken from serverA. After the backup (and before the restore on serverB), there are several INSERTS being performed on the serverA. After which, the backup is restored to serverB and the servers are mirrored from A to B. Does the synchronizing state mean that all transaction logs are being synchronized and serverB will now have those newly inserted transactions?
2. Does this mean that as long as the transaction log is not truncated on serverA, serverB will always have an exact copy of the serverA database?
Hi there, I need to create a synchoronization with the Server Mobile (displayed in the Pocket PC emulator) once the website (SQL server Database) is updated. Is there any coding available? How is it possible? PLSSSSS HELP ME....
Hi all, Well, I have created an applicatin in asp.net and it connect to MSSQL database, and it work fine.
There is another application which was developed in Oracle and the database is oracle 8i.
Well, wat i want is whenever a form is submitted from the asp.net application, the data is inserted in the MSSQL server database and the Oracle8i database also.
There is some strange behaviour i've recently noticed while watching synchronization progress in Replication Monitor on SQL 2005 Server Standard with merge replication configured. The merge process seems to repeat several times.
This is the initial synchronizaion (reinitalization at the subsciber). Client is using Microsoft.SQLServer.Replication objects from .net framework assemblies.
The synchronization starts normally (status is "Running"). The last message of selected session box shows (among other messages): "Beginning evaluating partial replication filters" then "Finished evaluating partial replication filters" and finally "Merge completed after processing xxx changes... etc." after a few seconds. Status changes to "Completed" and then... the merge process starts again!! "Beginning evaluating partial replication filters" etc. And this repeats about 15-20 times.
And so whole process takes about 15 minutes instead about 45 seconds to complete initial synchronization. The number of changes is "Merge completed after processing ..." never change since the first such message.
Is this some bug in web synchronization or some invalid configuration setting? Why does merge process repeat itself so many times??
I have a SQL Server 2005 Compact Edition database that synchronizes with a SQL Server 2005 Standard database via merge replication.
The problem I have is when I cancel a synchronization, the database is left in such a state that I cannot add any new records. I dug around a bit and have found that in the INFORMATION_SCHEMA.COLUMNS view, AUTOINC_MAX has been incorrectly set to the same value as AUTOINC_MIN for the primary keys, which explains the 'out of range' error I get in my program when running off such a database.
In contrast, a non-corrupted database has AUTOINC_MAX set to AUTOINC_MIN + 999, presumably because of my subscriber identity range of 1000.
If this is the only thing that has gone wrong, all I need to do is programmatically set the AUTOINC_MAX values to AUTOINC_MIN + 999, however I can't find out where to do this (and INFORMATION_SCHEMA.COLUMNS is a view so it can't be updated obviously.)
I have also heard that 'compacting' the database may help, but I don't know how to do this either!
I recently added a new user to my database. Now I want to delete that user, but I keep getting the error above. What do I need to do to delete my recently added user?
An error has occurred during report processing. (rsProcessingAborted) Query execution failed for data set 'TestID'. (rsErrorExecutingCommand) For more information about this error navigate to the report server on the local server machine, or enable remote errors
The log file reads:
---> Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Query execution failed for data set 'TestID'. ---> System.Data.SqlClient.SqlException: SELECT permission denied on object 'TableID', database 'Database', schema 'dbo'.
***Background***
General Users got an error message when trying to access any reports we have created. All admin have no problems with the reports. Users (Domain Users) are given rights (Browser) to the reports and the Data Sources (Browser) and yet cannot view the reports.
An error has occurred during report processing. (rsProcessingAborted) Cannot create a connection to data source 'DS2'. (rsErrorOpeningConnection) For more information about this error navigate to the report server on the local server machine, or enable remote errors
I'll add this from the report logs...
w3wp!processing!1!3/20/2007-11:43:25:: e ERROR: Data source €˜DS2€™: An error has occurred. Details: Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Cannot create a connection to data source €˜DS2€™. ---> System.Data.SqlClient.SqlException: Cannot open database €œDatabase€? requested by the login. The login failed. Login failed for user €˜DOMAINUsername€™.
The user has rights via a local group to the report and data source (Browser rights) and the local group has been added as a SQL login.
I gave rights to the databases themselves instead of just to SQL and the error changed (Ah-ha...progress, but why!?!?)
I need to export a database, x, of a server, X, to another database, y, of a server, Y and I need export the database schema only, not include the data. Does anyone know how to do that? Many thanks for replying.
Trying to get my hands around all the new security features of SQL Server 2005. In Management Studio did something I don't know how to undo. I added a database role ReadOnlyRole and clicked the box next to db_datareader in the owned schemas box. Then I tried to remove the ReadOnlyRole and could not. How do I undo what I did? Is it possible?
The below is the TSQL that generates the my issue.
Use [master] go create database [test] go
USE [test] GO
CREATE ROLE [ReadOnlyRole] GO
USE [test] GO
ALTER AUTHORIZATION ON SCHEMA::[db_datareader] TO [ReadOnlyRole] GO
