How to create virtual column using MySQL SELECT?


If I do SELECT a AS b and b is not a column in the table, would query create the "virtual" column?

in fact, I need to incorporate some virtual column into the query and process some information into the query so I can use it with each item later on.

6/22/2011 7:59:24 PM

Accepted Answer

something like

    SELECT id, email, IF(actived = 1, 'enabled', 'disabled') AS account_status
FROM users

this allow you to make operations and show it as columns.


you can also use joins and show operaitons as columns:

    SELECT,, IF( IS NULL, 'no selected', as country
FROM users u LEFT JOIN countries c ON u.country_id =
1/18/2009 3:07:48 PM

Try this one if you want to create a virtual column "age" within a select statement:

select brand, name, "10" as age from cars...

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