4

I have a vector layer: ROADS that is composed of different types of roads: primary, secondary, tertiary, trunk, etc.

When I right click on the layer ROADS and I go to Attribute table -> Select by expression -> the column where I want to do the selection: highway -> I wrote this:

"highway" ILIKE '%primary%' OR "highway" ILIKE '%secondary%' OR "highway" ILIKE '%tertiary%' OR "highway" ILIKE '%trunk%' NOT "highway" ILIKE '%trunk_link%'

Till NOT "highway" ILIKE '%trunk_link%' the selection is working well. I can see all the roads that starts with primary, secondary, tertiary and trunk. So also trunk_link -> I don't want that. To erase it from the selection I add NOT "highway" ILIKE '%trunk_link%'. It didn't work -> suddenly I had O selected lines .

Do anyone knows the solution to my problem?

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5

You need to connect the parts with AND or OR.

(
     "highway" ILIKE '%primary%' 
  OR "highway" ILIKE '%secondary%' 
  OR "highway" ILIKE '%tertiary%' 
  OR "highway" ILIKE '%trunk%'
)
AND "highway" NOT ILIKE '%trunk_link%'
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6
  • Perfect! Thanx a lot. Basically I made two errors: 1) instead of AND I put NOT ; 2) instead of NOT ILIKE I put just NOT. I tryied without brackets and it works too. – Janita Jun 10 '16 at 14:57
  • You probably could also just do ... OR "highway" ILIKE 'trunk' and forget about the last bit. – Matthias Kuhn Jun 10 '16 at 14:59
  • No no because I really don't want to see the the trunk_link feature. BTW I just tried to eliminate more then one feature from the selection (also secondary_link) and in that case the brackets are needed. – Janita Jun 10 '16 at 15:18
  • 1
    Sure, if there are also other trunk% attributes you are right. In general, try to use the % only where necessary, this way you are more precise and faster. I also usually just put some extra brackets even when not strictly required because I tend to forget if AND or OR takes precedence so I make the job easier for myself in the future. – Matthias Kuhn Jun 10 '16 at 16:55
  • I didn't accepted some answers? What does it mean? I didn't erase any answer..all of them are useful for me and I think that also to others with the same problem – Janita Jun 13 '16 at 11:38
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In the bottom right-hand corner of the 'select by expression' window, there is the 'select' button: pull the drop-down to reveal the 'remove from selection', 'add to selection', etc. That should do it.

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1
  • Thanx for a quick response. I tryied but it didn't work. Already have a solution @Matthias – Janita Jun 10 '16 at 14:58

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