# Simple database questions

**URL:** <https://forum.kirupa.com/t/simple-database-questions/198180>\
**Category:** Uncategorized\
**Created:** [August 23, 2006, 12:00am UTC](https://forum.kirupa.com/t/simple-database-questions/198180 "2006-08-23T00:00:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![OMG](https://avatars.discourse-cdn.com/v4/letter/o/9dc877/32.png) [@OMG](https://forum.kirupa.com/u/OMG)\
**Post date:** [August 23, 2006, 12:00am UTC](https://forum.kirupa.com/t/simple-database-questions/198180/1 "2006-08-23T00:00:48Z")

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can someone please tell me each of the type(in database) do? And what’s null?  
Or simply post a link of a tutorial

thanks