Question

I was kinda surprised when I saw following:

CREATE TEMPORARY TABLE X (ID int) AS SELECT NumColumn FROM Table

I have tried to google it but only found using this as alieases. What this use actually is? I feel bit confused since I was stupidly creating temporary table and then fill it by using of insert..

Thank you

Answer 1

Its how you create a temporary table and populate it with the results of a select query.

You can see it in the documentation at the very bottom of the CREATE TABLE specification

select_statement:
[IGNORE | REPLACE] [AS] SELECT … (Some legal select statement)