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

The SQL Developer unit testing framework involves a set of sequential steps for each test case. The steps are as follows, including the user input for before the step is run and the framework ...

The SQL development environment helps the programmer perform basic functions on supported non-Oracle databases. Developers can browse and execute basic SELECT queries on supported databases.

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.