Create/Modify table generation
Press Ctrl+F6 on the table name, either from the database view or directly from the SQL code. You get a window where you can modify the table. Define or change table components like columns, indexes, and constraints. In instant preview you can see the code that is generated. Choose what you want to do—execute it right away or paste it in the editor.
DDL statement for any object
SQL generator helps you to get DDL scripts with options. To do this, press Ctrl+Alt+G or choose Context menu → SQL Scripts → SQL Generator… and get the generated DDL of any kind of object (table, schema, procedure, whatever).
DDL statement for many objects or the whole schema
The same works for many objects and even for the whole schema. Press Ctrl+Alt+G on the schema name and get a script to create all the objects.
Generate execution script for procedures
To do this, choose Execute procedures and functions option in Generate drop-down list.
Code snippets for creating objects
The Generate action, available via Alt+Ins, helps you generate and modify DDL statements. If you create a function, procedure, trigger etc. with the Generate action, a DDL snippet will be pasted in the editor. If you create a table, you get the window mentioned above where you define all the table components from the UI: an appropriate DDL statement will be generated.