Merge multiple paradox databases into a single MySQL Database

Working with a different database type?

Central SQL Server Database

Central MySQL Database

The Basics

SQL-Hub allows you to merge data from multiple databases into a single central view. SQL-Hub is ideal where you have more than one database containing the same types of data. SQL-Hub combines the data from the tables in each of the databases into corresponding merged tables in a central database. Each record is tagged so its source database can be easily identified.

What you need

SQL-Hub: you need to install the appropriate version of the SQL-Hub database integrating tool for your databases on a Windows machine
Connectivity: SQL-Hub needs to be installed on a machine that can connect to your source databases and the host for the central database you create
Permissions: you need to have a login to your database server that allows you to create the merged databases (catalogs/schemas)
Client Drivers: In most instances no client tools or drivers will be required however in some cases you may need to install some client software or drivers to connect to your databases - see client drivers below

Once these are in place you are ready to start...

Workflow

SQL-Hub setup consists of a few simple steps...

Setting up the Central Database

To hold configuration information and the merged data

Connecting to a Source

To gather information about the structure of the source databases

Building the Central Tables

To create the table structure for the central copies of the chosen tables. This only needs to be done once - but can be revisited at any point

Adding Further Sources

To connect to each of the source databases - only the connection parameters are required, no additional configuration

Synchronisation

To merge the data from all of the source databases

The Result:

A Central Database with a copy of the chosen tables containing the data from all of the source databases

Client Drivers

You will need to use the 32-bit version of SQL-Hub

In order to connect to the paradox files the Borland Database Engine needs to be installed.

In some cases you will need to run SQL-Hub as administrator for connections to paradox to work correctly

Setting up the Central Database

Open SQL-Hub
Configure the Central Database Connection:

Enter the paramaters as follows

Central Server Name:	the name or IP Address of the MySQL Server the central database is to be hosted on
Central User Name:	a MySQL Username with access to the server and permission to create databases
Central Password:	the password for the MySQL user
SQL-Hub DB Name:	the name for the main central view database
File Storage Path:	a file system location to store local copies of the .db files (the directory needs to be exist and be writable)
Temp DB Prefix:	the prefix for central copies of the individual source databases

Click Connect:

SQL-Hub will connect to the Central Server

If the connection is not successful any errors will be shown in the progress panel.

Once the connection is made, an asterisk icon will appear.

Click on the asterisk to create the Central Database.

Once the above is complete you should be able to see this database in MySQL and you now need to connect a source database to complete the set up.

Click Add New Source

Now configure the first source

File System Connectivity

In order to extract data from paradox databases SQL-Hub needs to be able to access the .db files on the file system.

If the files are located on a different machine the file location may need to be set up as a windows share - the SQL-Hub user given permission to access this.

If the remote share is on a different domain (and therefore windows cannot automatically authenticate the SQL-Hub user) you may need to open the share manually (in Windows Explorer), enter valid domain credentials, and check the box "remember my credentials". This will allow SQL-Hub to access the files when running under this user profile

Connecting a Source

Click Add New Source
Configure the Source Connection:

Enter the paramaters as follows

Data File Path:	the file system path to a shared directory holding the .db files
Source Name:	the name to use for this source database in the central view

Click Connect:

SQL-Hub will connect to the Source Server

If the connection is not successful any errors will be shown in the errors panel.

If the Table List has not yet been created, that is the next step, if it has already been created you can proceed directly to synchronization.

Click Create Table List:

You can now select the tables you want to include in your merged central database

Check the box next to each table you would like to include if this is your first time configuring a merged central view you might want to just select one or two tables to try out. You can change the table selection later by clicking Update Table List.

Click Ok

Creating the central tables

SQL-Hub will display a message detailing the current status

Click Create Master Tables
to create empty copies of the data tables in the merged central database

If you have not used SQL-Hub before you will need to get a FREE licence to create the master tables. To get a licence, click the Get Licence button on the licence panel, top right.

Getting a Licence

Click on the "Get Licence" button in the Licence panel.
If you cannot see the Licence panel, click on the spanner icon.

You will be directed to the SQL-Hub website. Follow the instructions on the website

Copy and paste the code into the SQL-Hub Licence panel and click Apply.

Remember to click Create Master Tables again once you have your new licence.

Note: Some anti-virus systems (e.g. Webroot) may block the paste action on the SQL-Hub application - if you have this problem set SQL-Hub to "allow" under "Identity Protection" - feel free to switch it back to deny once you've pasted in your licence code

You are now ready to synchronise from this source

Click Synch

Synchronising

SQL-Hub allows you to synchronise in 3 ways...

On Demand Instance Synchronisation

Synchronise from a single source database from the user interface.

Click Synch on the panel relating to a specific source.

On Demand Full Synchronisation

Synchronise from all source databases from the user interface.

Click the Synch All icon on the Master Connection panel.

Scheduled Full Synchronisation

Synchronise from all source databases from the command line automatically. See Scheduling Below

The Synchronisation Process

The synchonisation process creates a database on the central server for each instance database and creates a table in the Central database for each table included.

Data is copied from each source database to a central copy and then inserted in the merged central database table by table. The progress and any errors are displayed.

Once the process is complete you will find tables in the Central Database containing data from all of the synchronised databases and tables.

Scheduling

You can schedule full synchronisation using the Windows Task Scheduler

When running through the UI SQL-Hub stores connection settings in the current user profile - the same user must be used for the scheduler to allow these connection settings to be determined

Open the Schedule panel, below the Licence panel
Click "Create Task"

SQL-Hub will automatically create a task to synchronise all sources daily.

You can edit the task using Windows Task Scheduler to suit your requirements. Just find the task in the Windows Task Scheduler Library and adjust the settings.

Your SQL-Hub setup is now complete

You now have everything in place to maintain a central database containing all the data from your source databases

As we say in Manchester, Job's a good 'un