3

enter image description here

"name" like 'column%'

Output preview: 0

or

"name" = 'column_title'

Output preview: 0

No filtering results in expression. Tried Qgis 2.12 and 2.18 both on OS X. Data is from Open Street Map - geofabrik supplier.

  • 1
    Did you also click "select"? The preview at the bottom shows the result for a random line in the dataset and not the amount of filtered features. – Matthias Kuhn Nov 14 '16 at 9:02
  • In your picture you have as recent selection like 'Trunk%' and your value in the table is 'trunk'. Keep in mind that SQL is case sensitive. Use Qgis ILIKE-Operator or lower("highway") to avoid it. And also what you mean by "name" = 'column_title' and like 'column%' ? It sounds like you want to filter for a column-names, but you can only filter for row-values. – Matte Nov 14 '16 at 9:10
6

Output preview is just telling you the result of your expression applied to the first record. A 0 just means it is false for that record.

If you go ahead and press select you will actually apply the filter to all of your records.

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