What for would you need it? Just imagine, you need to display a contact phone at your site's home page, but you hate (quite reasonably) to duplicate things and would like the phone automatically changes when you change it in the main contact component data. And you know, there is a plenty of similar tasks in site development; they could be done by many different ways, and mod_aiixql is one of them.
You just specify a query and how it has to be echoed to the output buffer. Basically that's all. The output is performed as usual by the two view templates; you can also design your own if you prefer. Please find some help and guidance right in the module admin interface.
The module requires a good knowlege of SQL, XHTML and PHP, so it's for experienced users only. Note as well that it accesses the database directly, so it's your own responsibility to configure proper user access levels for each its instance in Module Manager not to disclose any information accidentally.