What is temporary table in MySQL?

Question

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.

What is meant by temporary table in SQL?

A temporary table is a base table that is not stored in the database, but instead exists only while the database session in which it was created is active. At first glance, this may sound like a view, but views and temporary tables are somewhat different: ▪ A view exists only for a single query.

What is difference between a table and a temporary table?

A Temp table is easy to create and back up data. Table variable involves the effort when you usually create the normal tables. Temp table result can be used by multiple users. Table variable can be used by the current user only.

How do I view a temporary table in MySQL?

mysql> CREATE TEMPORARY TABLE t1 (c1 INT PRIMARY KEY) ENGINE=INNODB; Query INNODB_TEMP_TABLE_INFO to view the temporary table metadata. The TABLE_ID is a unique identifier for the temporary table. The NAME column displays the system-generated name for the temporary table, which is prefixed with “#sql”.

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.

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