Tuesday, June 3, 2025

Oracle - How to Connect to Oracle Database Using SQL Developer

Oracle Database is a robust, enterprise-level relational database management system used worldwide for storing, managing, and retrieving structured data. It supports high performance, scalability, and security for mission-critical applications.

Oracle SQL Developer is a free graphical tool for database development that simplifies writing and executing SQL queries, managing database objects, and administering Oracle Databases efficiently.


Prerequisites

Before you can connect, ensure you have the following:


  1. Oracle Database installed locally or credentials to access a remote database (hostname, port, service name/SID).

  2. SQL Developer installed on your system. You can download it from Oracle’s official site.

  3. Credentials – You need:

    1. Username

    2. Password

    3. Hostname / IP Address

    4. Port (default is 1521)

    5. Service Name or SID


Steps to connect to Oracle Database using SQL Developer:

  1. Launch SQL Developer

  2. Open the Connections Panel, On the left side, you will see a “Connections” panel.

  3. Click the green "+" icon or go to File → New → Database Connection.

  4. Fill in Connection Details


  1. Click the Test button.

  2. If successful, a status message will appear at the bottom as Success

  3. Now you can click on Connect button to connect to the database

  4. Now try to retrieve data from some table or view



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