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- Duration: Heap tables are stored in memory. Therefore a Heap table remains in existence even if the session is disconnected. When we restart Database, Heap tables get cleaned up.
- Temporary tables are valid only during a session. Once the session is disconnected, temporary table is cleaned up.
- Privilege: We need special privilege to create a Temporary table. Heap tables are just another form of storage in MySQL.
- Sharing: Temporary tables are not shared between clients. Each connection will have a unique temporary table. But Heap tables can be shared between clients.