Oracle to SQL Server Migration.

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 views to SQL Server format.
  • 🚫 We do not convert Oracle functions to SQL Server.
 DBConvert for Oracle & MSSQL

Migration directions:

  • Oracle ↔ SQL Server
  • Oracle ↔ Azure SQL DB | Azure SQL Data Warehouse
  • Oracle ↔ Amazon RDS ↔ SQL Server
  • Oracle ↔ Google Cloud SQL for SQL Server
  • ☑ Migrate to SQL Server Dump | Oracle Dump
  • ☑ Oracle views ↔ SQL Server views

Version: 2.1.4

Release Date: Feb. 12, 2020

 DBSync for Oracle & MSSQL

Sync directions:

  • SQL Server ↔ Oracle
  • Azure SQL DB | Azure SQL Data Warehouse ↔ Oracle
  • SQL Server ↔ Amazon RDS ↔ Oracle
  • Google Cloud SQL for SQL Server ↔ Oracle

Version: 1.4.1

Release Date: Nov. 14, 2018

Supported OS:

Related Links

GUI Application.

Use DBConvert / DBSync software GUI application to configure parameters for starting a migration process.

In general, the following 4 steps are required to perform conversion or synchronization

  1. Choose Source Database.
  2. Choose Destination Database.
  3. Custoimzation and configuration.
  4. Execution.

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

The screenshot below sums up general features available in DBConvert software solutions.

Command line mode

Previously saved sessions can be passed as parameters to Command-Line DBConvert Client. A session keeps source/ target DB connection settings and other specified options.

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

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

Built-in scheduler.

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

DBConvert screenshot



  • 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 Oracle server (this requirement is optional as there is an option to overcome the restrictions using dump file)
  • 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)

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

DBConvert Studio

 Version: 1.7.8

Release Date: June 21, 2020

Supported databases:

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