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/** @page tut_mongo_sync_query_complex Querying documents, part two
*
* We learned how to make simple queries in the previous section,
* we'll be brave and do something much more advanced this time: we'll
* limit the query to documents that have their @c "yes?" field set to
* @a FALSE, and sort the results by the @c "n" field, in ascending
* order.
*
* @dontinclude tut_mongo_sync.c
* @skip tut_sync_query_simple
* @skip }
* @skip void
* @until {
*
* @until gint i
*
* @until }
*
* After our routine connect, we build the query and select BSON
* objects:
*
* @until bson_finish (select)
*
* Then we launch the query:
* @until bson_free (select)
*
* And make a cursor, just like last time:
* @until }
*
* And that's pretty much the bulk of what we wanted to do: we just
* constructed our query and select BSON objects appropriately, and
* mongo_sync_cmd_query() does the rest.
*
* But just to make sure our results are sane, we iterate over the
* returned documents, and print the fields we're interested in:
*
* @until i++
* @until }
*
* And when that is done, all that is left, is to clean up after
* ourselves:
* @until }
*/
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