Migrating data from Oracle to SQL Server

This guide walks you through migrating data from Oracle to SQL Server in a few simple steps using ESF Database Migration Toolkit. Simplify complex migration tasks and save valuable time with our streamlined approach.

Oracle vs. SQL Server:

Oracle is a leading multinational computer technology corporation specializing in database management systems. Renowned for its robust and scalable database solutions, Oracle offers a comprehensive suite of products encompassing database technologies, cloud applications, and enterprise software. With a global presence and a reputation for innovation, Oracle serves diverse industries including finance, healthcare, retail, and manufacturing, empowering organizations to manage, secure, and analyze their data efficiently to drive business success.
SQL Server is a robust relational database management system developed by Microsoft, designed for a wide range of data management applications. It supports a variety of transaction processing, business intelligence, and analytics applications in corporate IT environments. Known for its high performance, scalability, and security features, SQL Server offers comprehensive tools for database creation, management, and maintenance, making it a preferred choice for both small-scale applications and large enterprise systems. Its integration with other Microsoft products and services further enhances its versatility and ease of use.

Prerequisite:

Software Required:

DMToolkit_x64.zip (63.5 MiB)	64-bit Windows application for ESF Database Migration Toolkit 12.2.09 (2025-07-17). (md5: af00d640b9e71618ed20932c52f4688d)
DMToolkit_win32.zip (58.8 MiB)	32-bit Windows application for ESF Database Migration Toolkit 12.2.09 (2025-07-17). (md5: 1b7566ee53ff21b6dc8444741b9da73a)

System Supported:
- Windows 7 or higher.
- Oracle 11g or higher.
- SQL Server 6.5 or higher.

Step by Step Wizard:

Configure Oracle Data Source
- In the "Choose a Data Source" dialog:
  - Select "Oracle"
- Enter server details:
  - Server name: localhost (default)
  - Port: 1521 (default)
- Provide authentication:
  - Username: system (default)
  - Associated password
- Select logon method:
  - Choose from: SID, Service_Name, or TNS
- Database specification:
  - For SID/Service_Name: Enter value in Database field
  - For TNS: Leave Database field empty
- Schema configuration:
  - Enter schema name (defaults to username)
  - Optional: Click Refresh to view available schemas
Fig. 1: Oracle data source configuration
Configure Microsoft SQL Server Destination
- In the "Choose a Destination" dialog:
  - Select "Microsoft SQL Server"
- Server connection details:
  - Enter SQL Server host name (optionally with instance name), e.g., localhost\sqlexpress
  - For TCP/IP connections:
    - Specify server port (default: 0 uses named pipes)
    - Provide username (e.g., sa) and password
  - For Windows Authentication:
    - Check the Windows Authentication checkbox
- Database configuration:
  - Click the Refresh button to list existing databases
  - Select existing database or enter new database name
  - Note: Non-existing databases will be automatically created during migration
- Schema configuration:
  - Click the refresh button to list existing schemas
  - Select existing schema or enter new schema name
  - Default schema: dbo (if left blank)
  - Note: Non-existing schemas will be automatically created during migration
Fig. 2: Microsoft SQL Server destination configuration
In "Select Source Table(s) & View(s)" Dialog
- Select migration objects: Choose tables or views to include in the migration.
  
  Fig. 3: Select tables and views
- Modify table structure: Click the ellipsis (...) button to access table options and schema adjustments.
  
  Fig. 4: Do transform
- Configure field mapping: In the Field Mapping options:
  - Customize destination fields (name, data type, default value, comments)
  - Select data transfer method:
    - Overwrite Table (replace existing data)
    - Empty Data (truncate before insert)
    - Append Data (add to existing data)
    - Skip Table (exclude from transfer)
  - Apply data filters before transfer
Execution Dialog
- Start migration: Click "Submit" to initiate automated data transfer from Oracle to SQL Server.
  
  Fig. 5: Execute migration
- Monitor progress: Click "Browse Log" for real-time migration tracking, including issue resolution details.
- Save configuration: Click "Save as job" to store settings for:
  - Quick reloads of migration jobs
  - Command-line execution (use: dmtc.exe --help for parameter options)
Finished!

After migration completes, the toolkit generates a comprehensive report for verifying migration accuracy. You can monitor progress as the automated process runs efficiently. For any questions or feedback, contact us – our team is ready to assist.