Questions tagged [select-by-expression]

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Make Feature Layer / Select / Select Layer By Attribute “Get Unique Values” grayed out in ArcMap ModelBuilder [10.8.1]

I'm trying to extract road segments from a feature class through ModelBuilder in ArcMap 10.8.1 based on attribute queries, but the "Get Unique Values" button does not pull up a list of ...
2
votes
1answer
39 views

Select by expression based on common ID

Background I need to select features (parcels) from an official source based on a list with no geometries provided by a client. Both data sets have a common, unique ID (parcel number). There are about ...
2
votes
2answers
44 views

QGIS expression to check if a an attribute value of a feature exist in another attribute column

I have a shapefile with two fields 'Name' and 'CountyFacilityID'. I would like to create an expression to select all features where Name exists in the CountyFacilityID column for any of the features. ...
1
vote
1answer
37 views

Create new shapefile for each unique attribute using for-loop with PyQGIS?

I have a roads shapefile. In its name field, I'll create a new shapefile per attribute. I already got each unique attribute under name. The for-loop that iterates over the unique attributes and ...
7
votes
2answers
115 views

Analysing point attributes within polygons

I'm using QGIS 3.4.4. I have a polygon layer and a points layer. The points have the attributes district and streetname. How can a check if all the points within a polygon have the same district and ...
3
votes
1answer
95 views

Selecting more features with the “ilike” and “in” operator using QGIS

Ii would like to select more features with expression in a specific field, which contains the name of the attribute (IN operator is useful). Moreover, the name could not be exact, so the ILIKE ...
3
votes
1answer
94 views

QGIS increase number of recent selections

is there any possibilty to increase the number of recent selections in the menu select by expression? I can´t store more than 20 selections. If I create a new selection, the oldest selection is ...