I have an attribute type of "QDate" and I wish to filter out features that are older than a given date. However I cannot seem to come up with the right magical incantation in the qgis filter to do so.
I do the following: 1. right-click on the vector layer and select "Filter ..."; the Query Builder dialog appears 2. In the expression field I write: "SampleTime" <= "2011/07/01" For which I get the following error: An error occurred when executing the query. The data provider said: OGR[3] error 1: Type mismatch or improper type of arguments to <= operator. So how do I get this to work? Thanks! Mark -- mcole...@gmail.com
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