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Migrate Oracle to SQL Server

DB Best can help you migrate Oracle to SQL Server achieving the performance, scale, and security of your mission-critical applications on-premises or in the cloud.


Many Oracle customers are concerned about being locked into a single vendor with high licensing costs, a fear that is often realized when it comes time to upgrade or modernize their environment.

Using Microsoft SQL Server, DB Best can help Oracle customers achieve the performance, scale, and security that their applications require while keeping costs under control. Microsoft SQL Server reduces costs by consolidating databases, virtualizing servers, compressing data, allocating resources more effectively, and managing policies. Utilizing SQL Server’s self-service business intelligence capabilities and the ability for end-users to create their own ad-hoc reporting, organizations can reduce their dependency on IT.

Typical challenges we see

Checking the database performance after migration

Prior to the migration, you should have a good understanding of your database workload including any key performance metrics and frequency of peak loads. The key to a proper comparison is a mechanism to replay a workload. You can achieve this through the SQL Server Distributed Replay feature or your own load harness.

Once under load, you can evaluate your new technology by monitoring pressure on CPU, Memory, IO Operations, and network traffic.

By monitoring when the system is under pressure you can determine if your technology is properly sized or if resources need to be adjusted.

DB Best can help you profile your existing environment and then grade your migration against that profile.

Migrating indexes from Oracle to Microsoft SQL Server

At first glance, an index is just another object in the database that needs to be migrated.  However, the manner in which data sits in storage is very different between Oracle and SQL Server.  DB Best approaches this circumstance by examining the logical layout of the tables and relationships, paying special consideration to the business needs and use cases of the underlying data to determine an appropriate indexing strategy.

Licensing optimization

One of the major factors to be considered when we migrate Oracle to SQL is licensing. In most cases, a SQL Server Standard edition may suffice. However, there are some key features of Enterprise Edition that should be considered which may have a big impact on the security, availability, manageability, and performance of your workload.

Conversion scope

When it comes to scope there is a choice that must be made around how the conversion will proceed. The team will review all the source Oracle Schemas. Each Schema could either be migrated into its own isolated database or converted into a single database with multiple Schemas. We will work with you to consider the required security for isolation needs between the various Schemas.

Specific migration issues

There are several considerations for migrating an Oracle database. In addition to reviewing the Schemas in each Oracle instance, special attention needs to be paid to data type differences and incompatibilities.

For example, Numeric and date/time values are stored at different levels of precision and scale. Moreover, Oracle and Microsoft implement the SQL ANSI standards differently which may return different results.

Testing the converted code

It’s paramount that a QA team that is familiar with business needs and with the data review the code conversions from Oracle to SQL. Moreover, the QA team will need to verify that the converted code returns the expected data in the format and order that the business is accustomed to.

The leader in Oracle to SQL Server migrations

Our DB Best team has developed a unique methodology to migrate Oracle to SQL Server that has been proven many times over with hundreds of positive customer experiences. Being the architect and original creator of SQL Server Migration Assistant (SSMA) for Oracle, the DB Best team is THE database migration expert you can trust with your project.

Based on our vast migration experience, the DB Best team has developed in-house products like Database Compare Suite and OraMigrator, which greatly complements SSMA for Oracle.

Here are the DB Best tools that we’ve developed to optimize the Oracle to SQL Server migration process.


Getting started

Sometimes you need a helping hand to get you started. Here are some of our offers to help with assessments, using SSMA, or developing a future-state roadmap.

Everybody is talking about the need for a digital transformation, but how do you get there? See how our future-state architecture design can use cutting edge technology to meet your organization’s needs.

Trust the team who built the SQL Server Migration Assistant to provide you with SSMA support in migrating your Oracle, SAP ASE, IBM DB2, MySQL, and Microsoft Access databases to SQL Server or Azure SQL Database.

We will guide you through the basics of SQL Server functionality, and show how it's compared with Oracle database applications.

Do you like what you see? Please contact us today to see how we can get started!

Save up to $1 million by migrating from Oracle to SQL Server

“Low-performing and costly” – these were major characteristics of the Oracle system for one of our customers, a leading US automotive manufacturer. In this regard, it was quite natural for them to consider migration to another database platform. We suggested changing their Oracle Database to Azure SQL Database and also moving their applications to Azure. According to the calculations made by our experts, the customer is estimated to save 1 million dollars over the next 5 years based just on reduced licensing!

The video below depicts the migration process in details.

Leveraging your existing investments in migration technologies

Data integration tools play a big part in the successful migration of Oracle databases to SQL Server. Ideally, you want to minimize the changes to your data integration processes. We have extensive experience in the following platforms.

We can help you get the most out of Oracle Golden Gate and facilitate real-time data integration, replication, transformations, and verification in heterogeneous IT environments. So you can have an extreme performance with Oracle Database integration and support for cloud environments.

Using Informatica solutions we can integrate your data from existing on-premises systems to the cloud, big data, and IoT systems smoothly and cost-effectively. Our solution architects will migrate the data accelerating time to value for your business goals.

We leverage a high-performance parallel framework on-premises or in the cloud with improved speed, flexibility and effectiveness to build powerful data integration infrastructure. Utilizing big data and Hadoop we help our customers more efficiently access new data sources.

Our developers can flawlessly replicate your data between different types of databases with handling any data changes. So your data never be missed. We also can simplify the ETL process and automate the manual procedures of data warehouse development to improve performance and cost.

We offer a fast and cost-effective way to connect, clean and share cloud and on-premises data using the architecture that easily scales to respond to growing business requests.

Put our Microsoft SQL Server Integration Services experience to use for seamless data extraction, transformation, and loading operations of any complexity.

Supporting your SQL Server solutions after the migration

As part of our migration project, we offer training, support, consulting, and managed services for your SQL Server solutions. If you don’t want to go through the hassle of maintaining the day-to-day operations of your databases and applications, be sure to check out our Operational Data Management service.

Are your DBA's stretched thin? Offload your IT needs to a dedicated team with industry-proven processes and world-leading tools and products

Check out the database consulting services we have used to help customers like you get the most out of their database platform.

Our DevOps services introduce cultural changes, best practices, and new technologies to improve collaboration between business, development, and operations to create an agile application development lifecycle.

We offer training in-person at your site, at a third party location, or remotely based on your needs. We can tailor our programs to your needs.