AWS Database Blog

Tag: Oracle

Convert JSON SQL queries from an Oracle database to a PostgreSQL database

Customers use semi-structured or unstructured data storage for various business use cases, which is schema-less and flexible in nature. One such type of semi-structured data is JavaScript Object Notation (JSON). JSON stores data in the form of KEY, VALUE, LIST, and ARRAY formats. Oracle Database stores JSON object data in CLOB data type columns. PostgreSQL […]

Implement active-active replication with RDS Custom for Oracle: Part 1 – High Availability

Amazon Relational Database Service (Amazon RDS) Custom is a managed database service for legacy, custom, and packaged applications that require access to the underlying OS and DB environment. With RDS Custom for Oracle, you can now access and customize your database server host and operating system, for example by applying special patches and changing the […]

Implement active-active replication with RDS Custom for Oracle: Part 2 – High Availability & Disaster Recovery

In this post, we advance the architecture that was discussed in Implement active-active replication with RDS Custom for Oracle: Part 1 – High Availability, where we implemented an Amazon RDS Custom for Oracle solution with multi-master and high availability. This post will show you how to add high availability (HA) and disaster recovery (DR) using Oracle […]

Best practices for migrating Oracle database MERGE statements to Amazon Aurora PostgreSQL and Amazon RDS PostgreSQL

To migrate an Oracle database to Amazon Aurora with PostgreSQL compatibility, you usually need to perform both automated and manual tasks. The automated tasks involve schema conversion using AWS Schema Conversion Tool (AWS SCT) and data migration using AWS Database Migration Service (AWS DMS). The manual tasks involve post-AWS SCT migration touch-ups for certain database […]

Best practices for upgrading Amazon RDS for Oracle DB instances from to 19c

Amazon Relational Database Service (Amazon RDS) for Oracle provides newer versions of databases so you can keep your DB instances up-to-date. These versions can include bug fixes, security enhancements, and other improvements. When Amazon RDS for Oracle supports a new version, you can choose how and when to upgrade your DB instances. As you may […]

Setting up passwordless login from Amazon EC2 Windows and Linux instances to Amazon RDS Oracle database instances

In today’s world, every organization uses a centralized location to store and manage user credentials. The most commonly used service for this is Microsoft Active Directory (AD). Organizations use LDAP protocol to authenticate users to their peripheral devices, but fewer companies use this centralized credential store to allow users to log in to their databases. […]

Managed disaster recovery and managed reader farm with Amazon RDS for Oracle using Oracle Active Data Guard

Many AWS users are taking advantage of the managed database offerings in the Amazon Relational Database Service (Amazon RDS) portfolio to remove much of the undifferentiated heavy lifting from their day-to-day activities. With Amazon RDS for Oracle, users can significantly reduce the administrative overhead of managing and maintaining an Oracle database. Amazon RDS for Oracle […]

Converting the SYSDATE function from Oracle to PostgreSQL

July 2023: This post was reviewed for accuracy. An Oracle to PostgreSQL migration in the AWS Cloud can be a complex, multistage process with different technologies and skills involved, starting from the assessment stage to the cutover stage. For more information about the migration process, see Database Migration—What Do You Need to Know Before You […]

Configuring SSL encryption on Oracle and PostgreSQL endpoints in AWS DMS

AWS Database Migration Service (DMS) helps you migrate databases to AWS securely. It supports homogeneous and heterogeneous migrations between different database platforms, such as Oracle to Amazon Aurora. AWS DMS supports continuous data replication while maintaining high availability and has been widely adopted for database migrations because it is easy to configure. For more information, […]

Migrating Oracle databases with near-zero downtime using AWS DMS

Do you have critical Oracle OLTP databases in your organization that can’t afford downtime? Do you want to migrate your Oracle databases to AWS with minimal or no downtime? In today’s fast-paced world with 24/7 application and database availability, some of your applications may not be able to afford significant downtime while migrating on-premises databases […]