Hi Otto, On Wed, 03. Aug 2011 at 11:27:12 +0200, Otto Dassau wrote: > is it possible to automatically add a rownumber with the field calculator > based on an existing other column? For example based on an alphabetical > order in another column ?
Only if you can come up with an expression that produces the number from the other value. > And what information does the rownum operator currently use to apply ids? > Creation order? The order in which the provider returns the features. So probably no particular order. The field calculator currently iterates the layer independently of the attribute table and increments the $rownum operator for each processed feature. Jürgen -- Jürgen E. Fischer norBIT GmbH Tel. +49-4931-918175-20 Dipl.-Inf. (FH) Rheinstraße 13 Fax. +49-4931-918175-50 Software Engineer D-26506 Norden http://www.norbit.de -- norBIT Gesellschaft fuer Unternehmensberatung und Informationssysteme mbH Rheinstrasse 13, 26506 Norden GF: Jelto Buurman, HR: Amtsgericht Emden, HRB 5502 _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
