Many Oracle customers are concerned about being locked into a single vendor with high licensing costs. Very often they realize this fear when the time to upgrade or modernize their environment comes.

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. DB Best can help you utilize SQL Server’s self-service business intelligence capabilities. As a result, this provides end-users with the ability to create their own ad-hoc reporting. So, organizations can significantly 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. Also, you can figure out that you need to adjust resources.

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 you should consider because they may have a big impact on the security, availability, manageability, and performance of your workload.

Oracle to SQL Server conversion scope

When it comes to scope there is a choice that must be made around how the conversion will proceed. Then the team will review all the source Oracle Schemas. After that, we can either migrate Each Schema into its own isolated database or convert it into a single database with multiple Schemas. Also, 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, you need to pay special attention 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.

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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.

Find the DB Best tools that we’ve developed to optimize the Oracle to SQL Server conversion process below.

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.

Also, consider leveraging our Migration Platform to ensure that your migration stays in line with a proven and successful path. This unique product automates database migrations and provides users with the Test Organizer module to automate testing after the migration.

Getting started

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

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.

Our experts calculated that the customer can to save approximately 1 million dollars over the next 5 years based just on reduced licensing!

The video below depicts the Oracle to SQL Server conversion process in details.

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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 after Oracle to SQL Server conversion. We have extensive experience in the following platforms.

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.

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Learn more

We have a great set of blog posts and data sheets to help you better understand our capabilities as the leader in database migration services. Explore your possibilities and experience our expertise in moving Oracle workloads to Microsoft SQL Server technologies.

Blog posts

An automated solution for Crystal Reports conversion from Oracle to SQL Server
13 August 2018 Andrei Ivanov

One of our customers decided to modernize their Oracle database to Microsoft SQL Server. However, the thousands of SAP Crystal Reports connected to their existing Oracle database prese...

Advanced Engineering Application Modernization from Oracle to SQL Server
22 April 2019 Peter Skjøtt Larsen

As moats create obstacles in the way of an invader, so do proprietary database features for developers. One of Oracle’s proprietary features is the Oracle Call Interface (OCI) which ...

Oracle to Azure SQL Database shift may save up to $1 million
16 June 2017 Andrei Ivanov

‘Low-performing and costly’ — these were major characteristics of the Oracle system of one of our customers, a leading US automotive corporations. In this regard, it was quite na...

Automating database migration projects with DB Best Migration Platform
6 November 2019 Irena Balin

PASS Summit 2019, Seattle, WA — DB Best released a multi-purpose Migration Platform, introducing full automation for all steps of a database upgrade or migration project. DB Best cre...

Reduce the cost of an Oracle database migration project by using SQL Server Linked Servers
21 December 2016 Bill Ramos

When talking about migration from Oracle to SQL Server, we always look for ways to work with our customers to keep costs under control. We recently completed an Oracle to SQL Server mi...

General approach to migrating Oracle applications with OCI interface to Microsoft SQL Server
12 June 2019 Nick Samoylenko

When migrating a customer’s Oracle databases to Microsoft SQL Server I often face the problem of updating relevant applications. A broad range of our customers use the Oracle Call In...

Use Caution When Mapping Oracle Data Types for Procedures and Function Parameters in SSMA
5 June 2019 Oksana Eremenko

When converting Oracle database code to Microsoft SQL Server, I often face the problem of correctly mapping Oracle data types to SQL Server data types. I regularly use SQL Server Migra...

Defining a naming convention in Oracle to SQL Server migrations
17 July 2019 Oksana Eremenko

When migrating Oracle databases to Microsoft SQL Server, you need to define a naming convention for the conversion of packaged procedures and functions. This step is as important as se...

Helping our customer to convert Oracle schemas with hierarchical queries to SQL Server
20 June 2017 Andrei Ivanov

One of the world’s largest information technology companies decided to migrate their Oracle database to SQL Server. They leveraged SQL Server Migration Assistant (SSMA) for Oracle to...

Comprehensive Java app upgrade while migrating to SQL Server
8 June 2017 admin

One of the largest transportation companies in the United States needed to migrate their Oracle-based application to SQL Server platform. The customer’s application code had high que...

Migrating Oracle database to SQL Server for a leading US healthcare company
17 March 2017 Andrei Ivanov

One of the leading US healthcare organizations needed to upgrade their health record system in an effort to drive down costs while enabling new capabilities. We proposed to migrate the...

Quick and easy automatic approach to database conversion
12 May 2017 admin

One of the largest US educational organizations has been running their data handling system in Oracle environment. They wished to reduce maintenance costs due to expensive Oracle licen...

Converting Oracle sequences to Microsoft SQL Server
15 August 2019 Oksana Eremenko

In Oracle, you can use a combination of a trigger and sequence to generate unique values for the key columns. However, when migrating your Oracle database to Microsoft SQL Server, you ...

Converting Oracle virtual columns to Microsoft SQL Server
19 September 2019 Oksana Eremenko

In Oracle, you can specify virtual columns in a table definition. Oracle Database doesn't store these virtual columns on the disk. Instead, the values of Oracle virtual columns are alw...


Modernizations to Microsoft's Data Platform
21 September 2016 admin

Cloud services such as Microsoft Azure, coupled with database technologies like SQL Server, enable organizations to quickly create and scale solutions that solve challenges and fuel ne...

Oracle to SQL Migration
21 September 2016 admin

Leveraging Microsoft SQL Server, DB Best can help Oracle customers achieve the performance, scale, and security that their mission-critical applications require while keeping costs und...

Database Modernization for Microsoft Technologies Datasheet
3 September 2019 admin

Read our Database Modernization for Microsoft Technologies datasheet to find out the details of our database modernization offer. We possess the in-depth understanding of database and ...

Migration Platform Datasheet
5 November 2019 admin

Are you developing migrating or testing your data-driven applications? Then you may need a comprehensive multi-purpose tool for all related operations. Read our Migration Platform data...

White papers

Guide to migrating from Oracle to SQL Server and Azure SQL Database
8 October 2015 admin

This white paper explores challenges that arise when you migrate from an Oracle 7.3 database or later to SQL Server 2014. It describes the implementation differences of database objec...

eBook: Database Migration
9 August 2018 admin

DB Best goes well beyond other migration service providers. We take a vested interest in your migration strategy, combining innovation with an accelerated ROI that meets your business ...

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