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Mayur PandeCourses Plus Student 11,711 Points
Andrew says in this video that DDL modifies the schema.
Why would someone want to do that, is there a reason for it?
Steven Parker229,005 Points
The reason to use DDL is that it's how you create and update the organization of your database (the schema).
Say, for example, you have a database that currently stores movie titles. But you decide you also want to keep the year the movie was released. You would use DDL to add the new column for the year to your table schema.
Think of DDL as what you use to change the size and shape of a box, and DML (Data Manipulation Language) as what would change the contents of the box. Both are important tasks in handling your storage needs.