Oracle - How to generate script from sql developer

Question

How to take script for schema of the tables, stored procedures of Oracle through SQL Developer tool (SQLPLUS command line interface)?

Answer 1

If you want to see DDL for the objects, you can use

select dbms_metadata.get_ddl('OBJECT_TYPE','OBJECT_NAME','OBJECT_OWNER') 
  from dual
/

For example this will give you the DDL script for emp table.

select dbms_metadata.get_ddl('TABLE','EMP','HR') 
  from dual
/

You may need to set the long type format to big number. For packages, you need to access dba_source, user_source, all_source tables. You can query for object name and type to see what code is stored.