Linked servers to many sqlite databases

I have around 600 sqlite databases and I have to be able to access them in sql server. I can create a linked server for anyone of these database and access data that way. But what should be the approach to be able to access the data (read-only) in all
of these databases? Please don't suggest data copy :)

I am sorry, I was not clear enough in my original post.
I have Sql Server and all 600+ sqlite databases on the same physical box. I need to be able to execute query (in SQL management studio) like this:
select a.machine, b.*
from machines a
inner join MACHINEDATA...performance b on b.machineid = a.id
In this query MACHINEDATA is the linked server that points to "performance435" sqlite database and performance is a table in "performance435" sqlite database.
Everything works just fine, except that I have 614 of these "performanceXXX" sqlite database files and I can't create that many linked servers manually.
So, the question is - how to arrange access to these 614 databases through SQL server management studio to be able to execute queries similar to the example above.
Thanks.

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Image not storing in SQLite Database

Hi All
I am creation an application in WPF C# in which i have created an Ink Canavs
now i want to insert the InkCanvas Data or stockes in SQLite Database for that i hv created an folder in my application
and on"btnSaveCanvasImg" button Clicked i am saving the image of InkCanvas in a folder and on "btnSaveImgInDatabase" button clicked The saved image stored in the database
But when i clicked on"btnSaveCanvasImg" button image saved in folder , but when clicked on "btnSaveImgInDatabase" button the image doesn't store in the database.
following is my code
XML:-
<Window x:Class="InkCanvasInDatabase.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="800" Width="600">
<Grid>
<InkCanvas Name="MainInkCanvas" HorizontalAlignment="Left" Height="500" VerticalAlignment="Top" Width="595">
<InkCanvas.Background>
<ImageBrush ImageSource="C:\Testimonial_Project\Assets\Images\notePaper.png"/>
</InkCanvas.Background>
</InkCanvas>
<Button x:Name="btnSaveCanvasImg" Content="Save Canvas Image" HorizontalAlignment="Left" Margin="33,599,0,0" VerticalAlignment="Top" Width="200" Height="51"
FontSize="20" Click="btnSaveCanvasImg_Click"/>
<Button x:Name="btnSaveImgInDatabase" Content="Save Image In Database" HorizontalAlignment="Left" Margin="281,599,0,0" VerticalAlignment="Top" Width="238" Height="51"
FontSize="20" Click="btnSaveImgInDatabase_Click"/>
</Grid>
</Window>
C# Code:-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Ink;
using System.Windows.Ink.AnalysisCore;
using Microsoft.Win32;
using System.IO;
using System.Data.SQLite;
namespace InkCanvasInDatabase
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
string imagename;
public MainWindow()
InitializeComponent();
public void loadInkAnalyzer()
InkAnalyzer theInkAnalyzer = new InkAnalyzer();
theInkAnalyzer.AddStrokes(MainInkCanvas.Strokes);
AnalysisStatus status = theInkAnalyzer.Analyze();
if (status.Successful)
saveInkCanvasBitmap();
else
MessageBox.Show("Recognition Failed");
public void saveInkCanvasBitmap()
RenderTargetBitmap rtb = new RenderTargetBitmap((int)MainInkCanvas.Width, (int)MainInkCanvas.Height, 0,0, PixelFormats.Default);
rtb.Render(MainInkCanvas);
BmpBitmapEncoder encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(rtb));
// FileStream fs = File.Open(@"C:\inkCanvas_Images\test.jpg", FileMode.Create);
FileStream fs = File.Open(@"C:\Users\xeniun1\Desktop\24.02.2015 Xenium_Project\23.02.2015 InkCanvas\InkCanvasInDatabase\InkCanvasInDatabase\InkCanvas_Images\.jpg", FileMode.Create);
encoder.Save(fs);
fs.Close();
public void insertImgInDatabase()
byte[] signature;
using (MemoryStream ms = new MemoryStream())
MainInkCanvas.Strokes.Save(ms);
signature = ms.ToArray();
string stConn = @"Data Source=inkCanvas_DB.db;Version=3";
SQLiteConnection sqliteConn = new SQLiteConnection(stConn);
sqliteConn.Open();
string sql = "INSERT INTO User_Details (User_Text) VALUES (@Sig)";
SQLiteCommand comm = new SQLiteCommand(sql, sqliteConn);
comm.Parameters.AddWithValue("@Sig", signature);
comm.ExecuteNonQuery();
private void btnSaveCanvasImg_Click(object sender, RoutedEventArgs e)
loadInkAnalyzer();
//MainInkCanvas.Strokes.Clear();
MessageBox.Show("Ink Canvas Save as Image");
private void btnSaveImgInDatabase_Click(object sender, RoutedEventArgs e)
insertImgInDatabase();
MainInkCanvas.Strokes.Clear();
MessageBox.Show("Ink Canvas Image saved in Database");
Plz provide solution for this
Regards

Please close your previous threads by marking helpful posts as answer before you start a new one.
The type of the image columns should be BLOB. And make sure that you are looking at the inkCanvas_DB.db in the output folder of your .exe ([your_project_foder]/bin/Debug or [your_project_foder]/bin/Debug) because it is this database that the data gets written
to unless you specify an absolute path in the connection string:
string stConn = @"Data Source=C:\Your_Project_Folder\inkCanvas_DB.db;Version=3";
Please upload a reproducable sample of your issue to OneDrive and post the link to it here for further help.
And please remember to close your threads by marking helpful posts as answer.

Using Database link to go from one database to another

Hi all,
I am trying to create a SQL-query which connects to two
different databases.
I have created a Database link, which points from on database to
the other, and have supplied the database name, username and
password.
when I try to run following query I get error ORA:02085, MY_LINK
is connecting to SIEBN1S.(domain).com
SELECT COUNT(*) FROM MY_TABLE@MYLINK;
additional info:
2 databases are exact copies on different servers (SIEBN1S and
N1SSIEB)
the MY_TABLE exists in both databases and I have rights on it in
both, I can separately connect to both databases and look into
MY_TABLE
I have created the database link using following statement (in
the N1SSIEB db):
create database link MYLINK connect to <usr> identified by <pwd>
using 'SIEBN1S'
any help is welcome

You have set GLOBAL_NAMES to TRUE in your init.ora file. This
means your database link must have the same name as the database
you want to connect to ie SIEBN1S.(domain).com.
alternatively you can change GLOBAL_NAMES. to test this try
'ALTER SESSION SET GLOBAL_NAMES=FALSE'.
hth, APC

How to determine the connection string to a SQLite database, in C# code

Hello. I'm trying to figure out how to specify the connection string to a SQLite database, I would like to access using the following code:
string connectionString = null;
SqlConnection connection;
SqlCommand command;
SqlDataAdapter adapter = new SqlDataAdapter();
DataSet ds1 = new DataSet();
string sql = "SELECT DataName, Data, Id, UserId, DateLastUpdated FROM MainTable";
connectionString = "Data Source=C:\\SQLITEDATABASES\\SQLITEDB1.sqlite;Version=3;";
connection = new SqlConnection(connectionString);
try
connection.Open();
command = new SqlCommand(sql, connection);
catch
The value I assigned to the variable connectionString, in the code above, I obtained somewhere from the Internet. It does not work. I'm using Visual Studio 2013, against the file sqlite-netFx451-setup-bundle-x86-2013-1.0.96.0.exe, which
I installed, and got from
here.
My application's App.config file looks as follows:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
</configSections>
<connectionStrings>
<add name="DC_Password_Saver.Properties.Settings.DC_Password_SaverConnectionString" connectionString="data source="C:\Users\patmo_000\Documents\Visual Studio 2013\Projects\DC Password Saver\DC Password Saver\DC Password Saver.db"" providerName="System.Data.SQLite.EF6"/>
</connectionStrings>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/>
</startup>
</configuration>
I tried to use the value assigned to connectionString in the XML settings above, replacing single backslash characters with double backslash characters, because the Visual Studio editor flagged them as unrecognizable, and wound up with the
following.
SqlDataAdapter adapter = new SqlDataAdapter();
DataSet ds1 = new DataSet();
string sql = "SELECT DataName, Data, Id, UserId, DateLastUpdated FROM MainTable";
connectionString = "data source="C:\\Users\\patmo_000\\Documents\\Visual Studio 2013\\Projects\\DC Password Saver\\DC Password Saver\\DC Password Saver.db"";
connection = new SqlConnection(connectionString);
The above code however does not work either. So again, does anyone know how I can specify in C# code, a connection string to access my SQLite database? Thanks in advance for your reply.

What does SQLite connection strings has to do with WPF?
You will find some valid connection strings here:
https://www.connectionstrings.com/sqlite/
But you cannot use the SqlConnection class to connect to a SQLite database. You will need to download and add a reference to the System.Data.SQLite library and then use the SQLiteConnection class:
connection = new System.Data.SQLite.SQLiteConnection(connectionString);
try
connection.Open();
command = new System.Data.SQLite.SQLiteCommand(sql, connection);
catch
Please refer to the following article for more information and an example of how to connect and read and write data from an SQLite database using C#:
http://blog.tigrangasparian.com/2012/02/09/getting-started-with-sqlite-in-c-part-one/.
There is contains a link where you can download the required assemblies.
Hope that helps.
Please remember to mark helpful posts as answer to close your threads and then start a new thread in an approproate forum if you have a new question.

[SOLVED] PowerDNS (pdns) - SQLite database '...' does not exist yet

PowerDNS 3.2-5 is having some issues connecting to my backend database (sqlite3).
beta powerdns # tail /var/log/errors.log
May 7 20:12:41 localhost pdns[19098]: Caught an exception instantiating a backend: Unable to launch gsqlite3 connection: SQLite database '/etc/powerdns/database.sqlite' does not exist yet
But when i do:
beta powerdns # sqlite3 /etc/powerdns/database.sqlite
SQLite version 3.7.16.2 2013-04-12 11:52:43
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> select * from domains;
1|<myhostname>|||NATIVE||
sqlite>
sqlite3 It fetches the records and domains to my liking but not PowerDNS.
Same thing goes for a blank db without any domains or records, i can query it but not PowerDNS.
Followed this guide in order to setup the proper tables and columns: http://doc.powerdns.com/html/gsqlite.html#idp9379264
(without the DNSSEC part, i'll give that a go later on)
It obviously loads the sqlite3 module, and tries to connect to the backend, which doesn't work, so the ArchLinux package is fine i'm guessing.
More info:
* Link to package: https://www.archlinux.org/packages/comm … 6_64/pdns/
* chmod == 777
* chown == nobody:nobody (and tried root:root as default)
* running as root (not pdns)
Last edited by Torxed (2013-05-08 10:52:05)

Solved it.
The guides are vague in this regard but once you've just read the config twice you'll understand the logic.
First of all, no absolute paths for sqlite3, it should be:
launch=gsqlite3
gsqlite3-database=database.sqlite
Secondly, find your chroot, and point it to your database location or put your database here (whichever):
chroot=/var/empty
The folder structure should be:
/var/empty/database.sqlite
And this py pointing to ./database.sqlite when starting sqlite3 in pdns, it should be able to lock on to the database.
Peachy!

Union All with Linked Servers - Works until loaded on to the report server then fails.

Hi,
On our production server I have 2 linked servers. One that leads to ServiceNow via ODBC and one that leads to an HP Openview database.
Testing these linked servers works fine. I have a query that obtains info from each source and 'union all' together. When i run this query in SQL Server management studio it works fine and I get info from both data sources union-ed together perfectly.
I transfer this into Visual Studio and create a report, which again runs perfectly.
I upload this report to the report server and try to run it and get the error:
An error has occurred during report processing. (rsProcessingAborted)
Query execution failed for dataset 'Dataset1'. (rsErrorExecutingCommand)
For more information about this error navigate to the report server on the local server machine, or enable remote errors
When I rummage through the log files for the report server, I find very little helpful errors, basically this:
ERROR: Throwing Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: , Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Query execution failed for dataset 'Dataset1'. ---> System.Data.SqlClient.SqlException: Cannot
execute the query.
I did a test where I created a copy of the report and ran only he Servicenow section of the report and it works, then ran only the HP section of the report and it works. It seems the UNION ALL is the problem somehow.
Anyone have any ideas??
Thanks
Kirsty

Hi Kirsty,
As you posted, this issue is caused by the security configuration of Linked Server.
Generally, in a domain environment, we can specify a domain account as the stored credentials for the report, and then configure the Linked Server to "Be made using the login’s current security context".
However,if we specify a SQL Server login as the stored credentials for the report, please set the Linked Server security to "By using this security context", and then providing the necessary credentials to authenticate at the linked server.
Please also add the Reporting Services Security role to the Linked Server Remote Server Login Mappings.
For more information about Creating Linked Servers, please refer to
http://msdn.microsoft.com/en-us/library/ff772782.aspx
About Security for Linked Servers, please refer to
http://msdn.microsoft.com/en-us/library/ms175537.aspx
Regards,
Swallow

Compare two tables on different server without using Linked Servers

I have an SSIS package that needs to compare a table to another table on another server. Then only delete data from the first table if it exists in the second table.
I know this is possible with Linked Servers but we are doing away with them in my company. Is there a way inside of SSIS to do this?
Oh and I can't use a Data Flow since I don't know the table names or columns at run time (the whole package is dynamic) so I can't map the columns ahead of time.
So no MERGE JOIN unless it can be used outside of a Data Flow.

You 'll have to use the Data Flow Transformation, thing is, given the constraints, your only option seems to be in generating the package programmatically (using code).
The type of a program would be a Windows Console. The program would expect a few parameters as the source and target tables along with any necessary connection parameters.
Then use the merge join (being the easiest to code in) in an Execute SQL Task component.
Examples of coding packages:
Samples for creating SSIS packages programmatically
PS: I can tell you, given your circumstances, at the very minimum the impact on the bottom line of your company is brittle apps accompanied with expensive maintenance which translates into reduced ROI from your tooling.
Arthur My Blog
The package is table driven and is a dynamic archival process. The end user just fills in the framework table and the package archives data from within a certain time range. The table can exist on any server, any database.
That part is done. The part that still needs to be accomplished is to delete data out of the base table since it is archived. I need a safe way of doing this and so thought to compare the archive table against the base table. Because they
can exist anywhere and can have any name I am not sure how to do this without Linked Servers. That being said we will not have Linked Servers for this.
Is there another safe way to delete data out of the base table?

Trying to use Linked Servers in SQL 2005 to connect to RDB 7

I'm looking for detailed info on how to set up a linked server in SQL 2005 to connect to my Oracle RDB 7 database (running on VMS). I'm able to connect via odbc using VS.Net and Sql Server 2005 Reporting Services. I'm not sure if I need to use the ODP.NET or not. I have created a generic linked server, but it requires me to use the OpenQuery function to access the data, which is not giving me the functionality I'm looking for.

Hi doanpq,
Please download and install OLE DB Provider for Visual FoxPro 9.0, which exposes OLE DB interfaces that you can use to access Visual FoxPro databases and tables from other programming languages and applications. Please see:
http://www.microsoft.com/en-us/download/details.aspx?id=14839
Then, please follow up the following article to create a linked server:
Creating Linked Servers:
http://technet.microsoft.com/en-us/library/ff772782(v=sql.105).aspx
For more information, you can also take a look at the following article, especially Dave K's comment:
http://blog.dbase.integralwebsolutions.co.za/2008/10/accessing-your-dbf-tables-via-linked.html
Elvis Long
TechNet Community Support

Please tell me the query,If i want to fetch before 5 days data into sqlite database in ios ?

Please tell me the query,If i want to fetch before 5 days data from sqlite database in ios ?

kumar190 wrote:
Please Can you send me the link of Sq-lite(Making own Schema). Which will be help full for me...
Here is the general concept for a database schema: http://en.wikipedia.org/wiki/Database_schema
This is how you would create a table in SQLite: https://sqlite.org/lang_createtable.html

Distributed Transactions and Linked Servers

I'm somewhat of a novice with SQL Server but I'm learning rapidly from an application I'm developing that uses SQL Server very heavily. In conjunction with the development of this application, I have 3-4 systems set up running SQL Server and I am using those
systems to develop the database that will ultimately support the application. I decided to try to use linked servers because I am moving data back-and-forth among the different servers frequently and I ran into some consequences that I wasn't expecting.
I was doing a simple delete query on one of the servers (Delete from TableName Where ...) and I was expecting, of course, that it would only impact the server I was running it on; however, when the query finished after running for a long time, it was apparent
that SQL Server had automatically escalated that simple delete query into a distributed transaction and applied it to all four of the linked servers I had defined. I was totally surprised by that and it took some time to recover the data that was inadvertently
lost on the other servers.
I want to ensure that this doesn't happen again without me expecting it - I think the right way to prevent this from happening is to run the following stored procedure:
EXEC sp_serveroption 'servername', 'remote proc transaction promotion', 'false';
Can someone please verify that this assumption is correct and will prevent SQL Server from automatically creating distributed transactions impacting multiple servers?
Thanks,
Chuck

Hello,
Based on your description, it seems that when you connect to a SQL Server database and execute a DELETE statement to delete a recode on a table, and then the same recode were delete in the linked server which has the same table.
As pre my understand, the statement executed on one server will not apply to the linked servers unless you specify the logic yourself in the application. For example, you use dynamic query and exec the query synchronously on linked servers.
What's more, did you specify replication between this linked server?
If I have any misunderstanding, please let me know.
Regards,
Fanny Liu
If you have any feedback on our support, please click here.
Fanny Liu
TechNet Community Support

Linked servers:Using 64 and 32 bit ODBC providers concurrently

I have a very odd problem that I hope someone can help me with. I have a 64 bit odbc MySQL driver. Unfortunately, although I can connect to the data source from the control panel, the linked server cannot connect to the MYSQL data source. The
funny thing is that other linked servers (using the same odbc driver) have no problem connecting to their respective hosts. The problem seems seems to be between the 64 bit linked server and the host (a shoretel IP phone database that runs on top of
windows). I know that the 32 bit driver used to work, but when I rebuilt the server to 64 rather than 32 bit the linked server failed. What I am trying to do is to use both 64 bit driver and 32 bit driver concurrently (I have installed the 32 bit
version using the WOW 32 bit odbc tool, but because the SSMS provider dialog only allows me to use the 64 bit system dsn. I am wondering if I can get the 32 bit version to work as well using a user rather than system dsn. Is this possible? I
can send screenshots of the problem if needed. Thanks in advance for any advice you can offer.

What I am trying to do is to use both 64 bit driver and 32 bit driver concurrently
You can not. You can only use provider of the same 32/64 bit architecture as the SQL Server have.
Olaf Helper
[ Blog] [ Xing] [ MVP]

Executed as user: ADMIN\abc-SQLServer. Linked servers cannot be used under impersonation without a mapping for the impersonated login. [SQLSTATE 42000] (Error 7437). The step failed.

Hi All,
We have verified permissions on both sides,current server and linked server, the user has sysadmin.
Another key piece of information is that this is happening when executing a SQL Job.
Thanks.

Related:
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/328616e9-42cb-40d7-a4b1-671d6a492d8f/linked-servers-cannot-be-used-under-impersonation-without-a-mapping-for-the-impersonated-login?forum=sqldatabaseengine
https://support.microsoft.com/kb/2492477?wa=wsignin1.0
http://sshakespeareblog.co.uk/2013/07/31/sql-linked-server-and-sql-server-agent/
Kalman Toth Database & OLAP Architect
SQL Server 2014 Database Design
New Book / Kindle: Beginner Database Design & SQL Programming Using Microsoft SQL Server 2014

SQL Server linked servers screens SSMS

Where in SSMS can you get to the "linked server" screen for configuration details for existing linked servers, as opposed to setting up a new linked server, I want to check the security tab via the software GUI as opposed to running SQL. I cant
see where you can see them, I know from memory when setting up a new linked server there is a "general", "security" and "server options" tabs, so I assume you can see all of those for already created linked servers.

Check Server Objects --> Linked Servers in SSMS object explorer.
Kalman Toth Database & OLAP Architect
Free T-SQL Scripts
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

HT204433 Can an HTML widget access SQLite databases?

I want to store some data in SQLite databases rather than localStorage for a mini-quiz at the end of the textbook I am creating. Is this possible?

localStorage or remote off your servers...that's it.

Linked servers

HI all,
i am using oracle10g and operating syustem MS xp.I need to fetch the tables in oracle Db from the sql server 2005.i tried out by linked servers.but itz not working.i know itz not fair posting a question of issue in sql server.bt i would bre appreciate if any one help me in this.
Thanks in advance

Please post in the general database forum instead of here; SQL Developer is a tool.
Anyway, you'd need Oracle's ODBC driver for connecting from third party apps.
Regards,
K.

Linked servers to many sqlite databases

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