Question

Which are the schema change statements in sql commands?

Answer 1

Answer:

A schema change is an alteration made to a collection of logical structures (or schema objects) in a database. Schema changes are generally made using structured query language (SQL) and are typically implemented during maintenance windows.

Answer 2

Schema change statements:

The ALTER Command- It performs some modifications in the table.

• Add: Insert  a column or attributes in the middle of the table.

• Drop: Can delete all the elements int the entire table all at once.

• Modify: a column or attributes can be renamed or a certain element can be deleted.

These commands are used to change the basic definition of the schema.