A wiki stores text with markup that defines some structure.
A SQL database stores a number of rows with some non-recursive structure (columns).
A noSQL database stores a number of documents with some structure (e.g. JSON)

Since quite a few wikis are used to store a lot of similar facts and objects, thus creating light-weight databases, it seems interesting to explore the possibility of extending this database ability of wikis.

Here is a list of features/topics that are relevant and could be considered:
* search in a wiki is similar to querying a database, although it ignores structure
* templates in a wiki are helpful to show the user what should be input and create similar pages easily.
* some plugins such as the task list plugin of the Confluence wiki offer a user interface for data input
* using some simple mapping rules, wiki text could be mapped to JSON structures and a couchDB backend would then be able to process the pages. If one writes the pages with some care, the JSON structures could be convenient to use in queries.
* A plugin in the wiki can display the result of a query (sort of a page include plugin on steroids)

Ideas of names for a Wiki/database hybrid:
* datki
* datiki
* dataki
* datuki

!!Integration With Ye Olde SQL RDBMS
It is currently possible to [embed SQL queries|SWD:WikiSQL] against available (to the servlet container) databases in wiki pages. It is also possible (with this wiki) to [embed forms|SWD:WikiSQLFormHandler] for inserting into a database in wiki pages. 

One interesting use for this would be to allow management of wiki users and roles (stored in an RDBMS) via the wiki itself.