If you want to install Oracle SQL Developer on your Windows computer for free, check if you meet the requirements and then go through the instructions mentioned here.

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

If the Oracle SQL Developer crashing on startup on your computer, you can follow the solutions mentioned in this post to resolve the issue.

Using Oracle Developer to work on your Oracle SQL database presents you with a functional IDE to write code and check data outputs from queries.

How to Connect to DB2 With SQL Developer. The Oracle SQL Developer tool can connect to databases other than Oracle, including MySQL, Microsoft SQL Server and DB2. The SQL development environment ...