Question

to create, modify and delete data base structures is used

Answer 1

Modification made to a database is a common reason for corruption. We should use caution when making changes and always backup our database files before doing so. Also it is good practise to close other databases while making other database modifications.

If you are modifying the database structure and using an active sorting layout or table layout, you must delete sorting layout and layout files. 

Answer 2

Answer:data definition language

Explanation: