added example function description for sql (maybe somebody could add the same for xquery?)
added example function description for sql (maybe somebody could add the same for xquery?)

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb