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What is the purpose of a temporary table like in the following statement? How is it different than a regular table?
CREATE TEMPORARY TABLE tmptable
SELECT A.* FROM batchinfo_2009 AS A, calibration_2009 AS B
WHERE A.reporttime LIKE '%2010%'
AND A.rowid = B.rowid;
Temp tables are kept only for the duration of your session with the sever. Once the connection’s severed for any reason, the table’s automatically dropped. They’re also only visible to the current user, so multiple users can use the same temporary table name without conflict.