A database is a place where we store data in the form of tables. Data means information that is very useful.
The SQL language to talk to a database or to access the database.
DBMS – Stands for Database Management System It is a database software that allows storing data in the form of tables.
It is also a database software that has the facility to handle more data volume, better performance, enhanced security features, etc if compared to the DBMS.
A constraint is a condition that restricts the invalid data inside the table. A constraint can provide for columns of a table.