How to Merge Two SQL Databases? A Complete Guide

When it comes to consolidating databases, users often get confused and worry about how to merge two SQL databases and then proceed to implement ways that can result in data loss or compromise data security. Through this technical blog, we will learn the effective ways in which this merging can be executed and further be used for respective purposes. Let’s first begin by understanding some common reasons why users prefer merging SQL databases.

How to Merge Two SQL Databases? Step-By-Step Process Explained

We will now take a look at the different methods that will help users merge SQL Server databases with complete precision. 

Method 1: With the Help of SQL Server Management Studio 

1. The first step is to open SSMS and connect it to the SQL Server Instance.
2. Next, open a new query window and choose the target database. 
3. Then, run an INSERT INTO…SELECT query to begin the merge process. 
4. After that, map and configure the destination columns and run the query.
5. The query will merge the data from two databases. Lastly, verify the merged data once the process is completed. 

Limitations: This might look like a simple method, but it also comes with multiple setbacks on how to merge two SQL databases. Below are some of the setbacks of this method:

• This method works with queries and commands; the user must have technical knowledge of SQL Server and its queries.
• The manual merging process can be time-consuming and can further result in errors if not executed properly.
• If the databases to be merged are large in size, the method might become more complicated or eventually fail.

With these limitations, it becomes crucial for the users to use a professional solution to merge databases SQL Server. We will now take a look at a similar way that will help database administrators with the how to merge two SQL databases task. 

Method 2: Using the Backup and Restore Method

This is another method that will help users consolidate their databases and the data within. Let’s now take a look at the steps of this method. 

1. Open SQL Server Management Studio and connect it to the SQL Server Instance. 
2. Take a backup of the source database and save the backup file. 
3. Use the specified backup to restore it in the target server.
4. Open the query window and then transfer the data using SQL Insert commands.
5. After the process is completed, check the merged data once. 

Limitations: We will now take a look at the limitations of this method and how it lacks in complete accuracy:

• This method requires users to have sufficient data for storing the backup files.
• The method might take longer for large databases, as taking a backup and restoring it are equally time-consuming.
• Even after restoring the data, it is still required to transfer them manually using SQL queries.
• During the restore process, there are higher risks of prolonged downtime.

How to Merge Two SQL Databases Professionally?

Here, we will use a smart and dedicated SQL Database Recovery Tool by SysTools. This is an advanced solution that allows users to effectively merge two SQL databases into one and manage the data conveniently.

Free Download Purchase Now

Additionally, the tool comes with several benefits that overcome the limitations of the manual method. Let’s first take a look at the steps on how the tool works and then understand its features. 

1. Install and run the tool. Click on the Open Button to add the desired MDF file.
2. Next, choose Quick or Advance Scan mode to detect any corruption.
3. After the scan, the tool will offer a preview of the scanned database objects. In case there was any deleted data, the tool helps recover it and displays it in red. Click on the Export button to export the recovered data. 
4. In the Export window, add the SQL Server login credentials.
5. The tool offers dual modes to export the data. Choose Existing Database as the export option to merge two databases SQL Server.
6. Next, click on the Export button to proceed with the database merge process.

With the help of this method on how to merge two SQL databases, users can effectively merge the databases and further manage the data in a consolidated and efficient way. Now, when it comes to opting for this method, as we earlier discussed, it overcomes most of the limitations of the manual ways. We will now take a look at the benefits of choosing this method:

• Using this utility, users can merge files irrespective of their technical backgrounds. This is a simple solution to help database administrators with database repair and merge tasks.
• With this smart tool, there are no such file size restrictions. The tool can be used easily and hassle-free for the merging of databases. Even if the user has large databases, it can handle the process seamlessly.
• The steps to use this solution are easy; hence, users can quickly merge the files without worrying about losing data or compromising data integrity.
• The most notable feature of this solution is that, in case the database to be merged is corrupt, the tool helps with recovering healthy data from the corrupt database first and then merges the recovered data with the desired single database.

Conclusion

With the help of this thorough write-up, we have learned how to merge two SQL databases. We have also discussed the common reasons that require users to merge SQL Server databases. To make the processes easier to understand, we have mentioned the best ways including both manual and professional approaches, that will help database administrators to proceed with the task effectively and without risking data integrity.