MongoDB works on concept of collection and document.
| RDBMS | MongoDB |
|---|---|
| Database | Database |
| Table | Collection |
| Tuple/Row | Document |
| column | Field |
| Table Join | Embedded Documents |
| Primary Key | Primary Key (Default key _id provided by mongodb itself) |
| Database Server and Client | |
|---|---|
| Mysqld/Oracle | mongod |
| mysql/sqlplus | mongo |
