[TYPO3-doc] Typo3-Extension to run selfmade SQL ?

[B.S.]

hi folks,

this is my first posting in any mailing list, so i hope, everything 
works....

i'm pretty new to typo3 but there's a complex project upcoming.

users should enter data which is then stored in a database and users 
should be able to search within that database for information. i'm able 
to generate those SQLs for these actions.
my question is: is there a typo3-extension which enables you to run any 
given sql to store AND retrieve data from a database?

and how could i use the output of the query in typo3?
for example, one query should output just a simple list of findings; 
another should generate a chart.

i really hope you can help me and i appreciate and thank everyone who 
finished reading my text :)

cheers,
narf