PostgreSQL is a powerful open-source relational database that allows you to efficiently store, organize, and query data. A key aspect of working with PostgreSQL is being able to modify the structure of your tables as your data requirements evolve. A common task is adding new columns to existing tables. In this comprehensive guide, we will…
Oracle Database powers the most critical applications, regardless of the industry. Interacting with an Oracle Database requires a client tool that allows you to execute SQL commands and manage the database. One such tool is SQL*Plus, a powerful command line interface that comes bundled with Oracle Database installations. SQL*Plus serves as a text-based interface, particularly…
A SQL database, often known as a relational database, is a collection of highly structured tables, with each row representing a data object and each column defining a specific information field. To view the users in an SQL database, first log in as an administrative user to your SQL server using the SQL command line…
Oracle SQL Developer is a powerful Integrated Development Environment (IDE) for Oracle Database. It’s a blessing if you’re a database administrator or a developer working with Oracle systems. With the user-friendly interface of SQL Developer, you can easily manage and interact with your Oracle Database. This article will walk you through the steps to create…
A relational database management system is the Oracle Database. OracleDB, or just Oracle, is another name for it. Oracle Corporation creates and markets it. It is one of the most used relational database engines for storing, organizing, and retrieving data in the IT sector. Sessions that are operating for a longer period in an Oracle…
Generally, each EC2 instance you launch using an AMI has a root volume of 30 GiB during launch. However, you can increase this general-purpose SSD (gp2) space afterward by expanding the EBS volume size first and then extending the associated file system space at the OS level. The Amazon EC2 console or the AWS CLI…
You usually get two built-in features to track database changes in your SQL Server. One is the Change Tracing feature, while the other is the Change Data Capture. Once you enable these, the applications can determine DML changes like insert, update, and delete operations. Although you can create your own programs to track the same…
Data restoration incorporates copying backup data from mass storage and restoring data to its unique or new location. Successful database organization in the world of data administration depends on the capacity to restore an SQL database to another server. This procedure is fundamental for effectively moving databases between servers, guaranteeing data integrity, and engaging processes…
Using the UTL_MAIL package can be an ideal choice if you want to send emails from Oracle Database 12c. This package provides an interface to send email messages directly from your database environment. Hence, there’s no need for third-party email services. Also, the setup process is not that hard. You only have to configure the…
The DB2 SQL error SQLCODE=-204 SQLSTATE=42704 points to an issue where a queried object is undefined in the DB2 subsystem. This error, applicable to different object types, signifies an undefined version of the object, often packages. The following sections contain further details of the error code, its cause, and remedies. What Is the SQL Code…
