Oracle to SQL Server conversion and synchronization.

A large number of mid and large-sized companies currently utilize Oracle on-premise databases as part of their overall IT infrastructure. As the volume of data in the database ecosystem continually increases, it requires better management and more expensive storage.

One of the possible solutions is to migrate Oracle data to SQL Server (hosted in Azure SQL cloud or on-premise).

SQL Server Migration Assistant for Oracle (Oracle2SQL) from Microsoft serves such kind of tasks. Migrating Oracle to SQL Server using SSMA is possible in ONE direction only.

You should be aware that there are several different usage scenarios for SSMA alternative - DBConvert migration tools:

  1. DBConvert tool minimizes challenges you can meet when migrating from Oracle to SQL Server. Your database schemas, tables, views, and relations will be migrated accurately and rapidly according to the requirements of the target database, preserving database consistency.
  2. After making a copy of your source database to target DB, keep your databases in Sync with Update, Insert, and Drop synchronization features.
  3. You can configure a DBSync windows application to perform bidirectional replication between Oracle and SQL Server (where two different databases simultaneously replicate changes from each other).

Four steps to migrate Oracle to SQL Server.

  1. Connect to the source Oracle database that you want to migrate. Once connected, DBConvert program obtains metadata about Oracle objects and displays them on the customization step later.
  2. Connect to destination on-premises SQL Server or a cloud MSSQL instance on Azure SQL DB/ Azure SQL Data Warehouse, Amazon RDS, or Google Cloud SQL for SQL Server.
  3. Pick tables, indexes, foreign keys, and views or select all to convert the whole database from the Oracle to SQL Server, Azure.
  4. Migrate, or Sync Oracle database objects to the destination on-premises SQL Server or instance in the clouds.

Note: Your connections to source and destination servers stay active until you close DBConvert software or open new connections on "source"/ "destination" steps.

Benefits of using DBConvert software.

  • ✅ In any combination, data migrations between Oracle, Microsoft SQL Server, Windows Azure SQL Databases/ Azure SQL Data Warehouse, AWS RDS, or SQL Cloud for SQL Server are possible. Please refer to the list of available conversion and sync directions in product info cards on the top.
  • ✅ Because the Oracle and SQL Server data types are different, DBConvert software automatically assigns a data type for the target database. With Data Type Mapping, you can easily match Oracle data type to its closest relative equivalent in the SQL Server target fields.
  • ✅ On the customization step, an smart error checker verifies all possible data integrity issues and highlights them, if any, before performing a migration.
  • ✅ Syntax of SELECT-queries of Oracle views and MS SQL is similar but not the same. DBConvert application can Convert Oracle queries to SQL Server format.
  • 🚫 We do not convert Oracle functions to SQL Server.
Supported databases:
  • Oracle On-Premises
  • Oracle Cloud
  • Microsoft SQL Server
  • Azure SQL DB
  • Azure SQL Data Warehouse
  • Amazon RDS
  • Google Cloud SQL for SQL Server
  • ☑ Migrate to SQL Server Dump | Oracle Dump
  • ☑ Oracle views ↔ SQL Server views
 DBConvert for Oracle & MSSQL

Version: 2.1.8

Release Date: Oct. 24, 2023

 DBSync for Oracle & MSSQL

Version: 1.4.5

Release Date: April 24, 2024

Try All-in-one DB migration and Sync software.

DBConvert Studio

 Version: 4.0.9

Release Date: June 17, 2024

Supported databases:

  • SQL Server
  • MySQL
  • MariaDB
  • Percona
  • Oracle
  • PostgreSQL
  • Access
  • FoxPro
  • SQLite
  • Interbase
  • Firebird
  • IBM DB2
  • MS Azure SQL
  • Amazon RDS
  • Amazon Aurora
  • Heroku Postgres
  • Google Cloud

Using Oracle to SQL Server conversion and synchronization tools.

When launching the DBConvert or DBSync application in GUI mode, it seamlessly guides you through the steps to initiate database migration or synchronization:

1. Connect to Oracle source database.

Specify the username/password and host/port parameters if your source database requires login credentials.

Connect to Oracle source database from DBConvert

2. Connect to SQL Server destination database.

Specify parameters for the destination database similar to the source, defining connection settings and username/password pairs.

Connect to SQL Server target database from DBConvert

NOTE #1: Each DBConvert or DBSync tool's name comprises two different databases, enabling any specified database to operate as the source or destination. Furthermore, the same type of database can function as both the source and destination.

NOTE #2: Connections to cloud databases (e.g., Amazon RDS, Google Cloud, or Azure SQL) aren't explicitly specified in the user interface but use the same settings as traditional on-premises databases.

NOTE #3: Connections to source and target databases remain active until you close the DBConvert/DBSync application or reopen new connections.

Refer to our documentation for specific source/ destination configurations for different databases.

3. Configure database migration options.

Specify the tables, fields, indices, and views you want to transfer to the SQL Server destination database by checking/unchecking the corresponding boxes.

Customize general database/ tables settings. Or configure specific table , field, index object individually when migrating data.

Explore our articles in the user's manual about Configuring database migration options. for detailed information.

The screenshot below summarizes the general features available in DBConvert software.

4. Detection of potential database migration issues. Errors and Warnings

The database enforces certain relations on the data, and on the customization step, an intelligent error checker verifies all possible data integrity and referential integrity issues. It highlights any problems before migration starts.

By default, DBConvert attempts to automatically map the database types of the source Oracle database to the closest equivalent of the target SQL Server database types. However, you can manually change the data types for the entire database globally using the "Global mapping" or individually for each field.

Explore the Intelligent error checker for more information. on errors and warnings

5. Execution. The final stage of data migration.

Initiate the conversion or synchronization process after configuring source and destination databases in the previous steps.

Click the "Commit" button to start conversion. Here, you can also monitor the migration/synchronization process.

Optionally save connection settings and configuration parameters into the session file to schedule the launching of sync or migration jobs regularly.

Execution step of DBConvert products

Explore more about the options available during the execution stage

Command line mode

Pass previously saved sessions as parameters to the Command-Line DBConvert Client. A session retains Oracle source and SQL Server target database connection settings with other specified options.


C:\Program Files\DBConvert\oracle2mssqlPro\oracle2mssqlPro_Cons.exe /Session:"Session_Name"

NOTE: First, run the software in GUI mode to create a session file with initial parameters.

Built-in scheduler.

Our applications include a built-in scheduler to run database migration and sync jobs at specified times. Set the scheduled date and time to execute job sessions automatically.

Find more Information about the built-in scheduler

DBConvert screenshot

Supported OS:


  • Necessary privileges to write into database on the target Oracle server (this requirement is optional as there is an option to overcome the restrictions using dump file)
  • Oracle 12.x versions require Oracle Database 12c Release 2 Client ( for Microsoft Windows (32-bit) to be installed.
  • Necessary privileges to write into database on the target SQL Server (this requirement is optional as there is an option to overcome the restrictions using dump file)


  • Oracle Cloud support
  • MS SQL Server (Express) 2000/2005/2008/2008 R2/2012/2014/2016/2017/2019, Azure SQL
  • SQL Server schemes support
  • Speed up conversion with Bulk and Quantization features.
  • Views conversion from Oracle to MS SQL and MySQL and back support
  • Oracle 10.x.x/ 11.x.x/ 12.x.x, 18.x.x, 19.x.x, Oracle XE (Express Edition) located on Linux, Solaris, Mac OS X, Windows machines
  • Saving data into an Oracle Dump for export to Oracle database
  • Amazon RDS SQL Server DB Instance support
  • Saving data into a SQL Dump for export to SQL Server database
  • Bi-directional synchronization between SQL Server, MySQL, Oracle and PostgreSQL
  • ODBC Oracle and Oracle client are not required
  • Views conversion from SQL Server to MySQL and Oracle and back support
  • Connect to SQL Server either TCP/IP, PIPE or IPX/SPX communication protocol
  •  DBConvert Key features.

Explore details regarding reverse migration.