SQL queries useful to check if Table exists or not in Oracle database., You can try these queries in SQL developer to know if Table is created by DBA or database administrator.
The well explained ideas in SQL query how you can include sequence is given here for your quick reference. These also useful for learning SQL.
The syntax as given in Oracle built-in function, it is to convert lower case letters into upper case letters. The explanation given here is with examples. So that you use in your SQL program directly.
The COMMIT, ROLLBACK and Transaction are very important in terms of SQL. When you are a Oracle SQL developer you need to work with SQL developer always. Read more.