Oracle Skills

Oracle is a widely used relational database management system that provides a powerful query language for retrieving data. In some cases, retrieving the names of columns in a specific table may be useful. This article will show you how to fetch colu…

In Oracle SQL, constraints enforce rules on data stored in a table. Constraints can be used to enforce data integrity, such as ensuring that a column always contains a specific type of data or that a column always has a value. If you want to see the…

When designing a database, you'll have to make one important decision: whether or not to use foreign keys. A foreign key is a constraint that enforces a relationship between two tables. For example, you might have a table that contains informati…

Oracle SQL Developer is a powerful and popular tool for working with Oracle databases. One useful feature of Oracle SQL Developer is the ability to use variables in SQL statements. Variables allow you to store values that can be used in multiple sta…

Oracle is a powerful and widely-used database management system. By default, Oracle listens for incoming connections on port 8080. However, there may be situations where you need to change the Oracle port from 8080 to a different value. This can be …

Tableau is a powerful data visualization tool that allows you to connect and analyze data from various sources. However, it has a limit of 40 columns that can be displayed in a single view. If you have more than 40 columns, it can be challenging to …

In PL/SQL, you can use the SQL%ROWCOUNT attribute to determine the number of rows affected by an UPDATE statement. SQL%ROWCOUNT is a built-in attribute that returns the number of rows affected by the last executed SQL statement. Here is an example o…