You are trying to execute it as a query. You need to execute it as a script. Use the second button from the left with the smaller green triangle on it, not the big green triangle.

Oracle has announced the general availability of Oracle SQL Developer Release 1.2 that features new capabilities to ease the migration and consolidation of third-party databases onto Oracle Database ...

Oracle SQL Developer is a great tool for managing Oracle Databases. It has a user-friendly interface that makes it easier to handle database tasks. The software offers features to simplify workflows ...