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Where are MySQL temp tables stored?

An internal temporary table can be held in memory and processed by the MEMORY storage engine, or stored on disk by the InnoDB or MyISAM storage engine. If an internal temporary table is created as an in-memory table but becomes too large, MySQL automatically converts it to an on-disk table.


Where are database temporary tables stored?

Temporary tables are stored inside the Temporary Folder of tempdb. Whenever we create a temporary table, it goes to the Temporary folder of the tempdb database.

How does MySQL store temp data?

To create a temporary table, you must have the CREATE TEMPORARY TABLES privilege. After a session has created a temporary table, the server performs no further privilege checks on the table. The creating session can perform any operation on the table, such as DROP TABLE , INSERT , UPDATE , or SELECT .

Are there temp tables in MySQL?

In MySQL, a temporary table is a special type of table that allows you to store a temporary result set, which you can reuse several times in a single session. A temporary table is very handy when it is impossible or expensive to query data that requires a single SELECT statement with the JOIN clauses.

Are temp tables stored in-memory?

This all means that temporary tables behave like any other sort of base table in that they are logged, and stored just like them. In practice, temporary tables are likely to remain cached in memory, but only if they are frequently-used: same as with a base table.

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