sequences, Procedures, triggers, functions, compiling, drop etc.
→ SQL COMMANDS: run sql commands, Anonymous PLlSQL blocks, scripts, and saved queries
→ QUERY BUILDER: Using graphical interface, search, View, modify, establishing relationships and fiddling with Database obJects.
Utility: Load l Unload Data, generating DDL
export import
Lots and Lots of Jargons. Just ignore. On seeing the icons on Apex Home Page and sub Menu Icons decryption alone has been narrated here. Even if you do not understand right now, Just ignore and proceed you will have very bright understanding after creating a model application. While you are learning car driving, instructor use to tell this is brake, accelerator, ignition, and some rules. I know remembering on the very first session and understanding is a tough task. After learning, did you ever remember the definition given on car obJects? Just satisfy yourself you are able to enter into Oracle Apex Home Page.