Data Definition Language
- Execution of Data Definition Language statements create the schema.
What are the drop table statements for?
- Dropping a table is dangerous ...
- ... in production. For development, you want to start with a clean slate.
- Tables are dropped in order determined by foreign keys: Must
drop child before parent. E.g., drop ord before customer.
- Required by referential integrity. E.g. can't drop customer before
ord because ord rows reference customer rows.