Integrating SQL Server data warehouse to improve operational efficiency
Data warehouse integration to embrace data analytics
27 Jun 2017

Our customer has been supporting Oracle based online transaction processing (OLTP) system. They decided to take advantage of the modern data analysis capabilities of SQL Server’s data warehouse features including columnstore for greater value over an Oracle based data warehouse solution. We came up with a comprehensive solution on extracting and transforming their source data and loading it into the target database. As a result, our customer benefited from obtaining a highly standardized and easily manageable solution within a short […]

An ultimate approach to converting hierarchical queries from Oracle to SQL Server
Helping our customer to convert Oracle schemas with hierarchical queries to SQL Server
20 Jun 2017

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 automate the major part of their migration effort. However, their source database code included over 400 hierarchical queries that SSMA could not convert. Neither could the customer’s technical staff. So, they turned to DB Best asking for assistance in converting a number of Oracle database schemas. We helped our customer to solve this […]

AWS Schema Conversion Tool
Oracle to PostgreSQL migration with AWS SCT: How to convert INSERT ALL statement
19 Jun 2017

In Oracle you may use the conditional insert clauses, for example, an INSERT ALL statement to add multiple rows with a single command. You can insert rows into one table or even multiple tables using just one SQL statement in Oracle. However, PostgreSQL doesn’t support such statements that attempt to inserting multiple rows. So, when you try to convert the source Oracle code that includes the INSERT ALL statement to PostgreSQL in the AWS Schema Conversion Tool, it will generate the following […]

Oracle to Azure SQL Database shift may save up to $1 million
16 Jun 2017

‘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 natural for them to consider migrating to another database platform. We suggested changing their Oracle Database to Azure SQL Database and moving their applications to Azure services. However, the customer may well anticipate this Oracle to Azure migration solution. Why? Because according to the calculations made by our experts, they can save […]

Oracle to PostgreSQL database migration and unification project
Using PostgreSQL in cloud alongside with Oracle to enhance the database system performance
15 Jun 2017

One of the leading independent software vendors in educational domain needed to expand their original Oracle database system. They wanted to add a new PostgreSQL database running on AWS RDS to their original system and upgrade the connected Java application to support both database platforms. We came up with a proof of concept and converted one of the largest customer’s database schemas to PostgreSQL, demonstrating how the upgraded system might work. To do so, we updated the application by adding […]

Oracle to SQL Server migration with SSMA: How to convert virtual columns
14 Jun 2017

Oracle allows you to specify virtual columns in the table definition. Oracle doesn’t store the data in virtual columns on the disk. On the contrary, the database derives the values in a virtual column on demand by computing a set of expressions or functions. The computed columns in SQL Server are considered as a direct analog of Oracle’s virtual columns. The problem is that the SQL Server Migration Assistant (SSMA) for Oracle converts the virtual columns as a DEFAULT expression. Thus the logic that stands behind the […]

Oracle to SQL Server migration with SSMA: How to convert unsupported SQL clause
13 Jun 2017

Oracle allows you to assign a non-scalar condition in WHERE clause. The problem is that SQL Server doesn’t support conditions of this type. Thus, the SQL Server Migration Assistant (SSMA) for Oracle doesn’t convert queries with a a non-scalar condition in WHERE clause. So, when you try to convert the source code that includes a non-scalar condition in a WHERE clause, SSMA will generate an error O2SS0001.

Comprehensive Java app upgrade while migrating to SQL Server
Comprehensive Java app upgrade while migrating to SQL Server
08 Jun 2017

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 query complexity which increased the level of difficulty for our automated tools. In order to overcome this challenge, we performed manual conversion of the embedded SQL code along with application upgrade to the latest Java version. The customer didn’t have the time, resources or expertise to modernize and migrate their many hundreds of business critical […]

Fast and error-free migration to the AWS cloud
06 Jun 2017

A major data processing company has been supporting on-premises system with an application that handles document flow from several local printers. They needed to leave their current data center. So they asked us to migrate the application database to the cloud. After assessing their system and choosing the most optimal migration strategy we performed lift-and-shift migration of their Oracle database to the newly provisioned AWS cloud. As a result, we delivered cost and time-effective solution protected from possible issues. Have […]

Moving Oracle Forms to Web-Based User Interface
Moving Oracle Forms to The Web as a Part of Database Migration Project
16 May 2017

A government healthcare organization wanted to move their Oracle Forms to a modern web-based UI. We offered to migrate their source Oracle database to SQL Server while converting the deprecated Oracle Forms to the modern-looking web-interface. We used a previously developed technology to automate the major part of Oracle Forms conversion. To demonstrate the feasibility of this technology, we converted one the most complex forms. Having successfully completed the proof of concept, we convinced the customer to continue our partnership. […]