Am 21.09.2015, 08:39 Uhr, schrieb Andreas Neumann <a.neum...@carto.net>:

... if you use capital letters in field names (which is discourage anyway).
Hi Andreas,
could you elaborate a little on why not to use capital letters for field names? Recently I started using capital letters for fields, cause for me, any expressions and codes becomes much better readable. (Which also reminds me, that a lot of processing functions change field names to upper case or lower case or leave them as is, totally unconsistenly.)

Cheers
Bernd




On 20.09.2015 12:59, Matthias Kuhn wrote:
Hi Phil,

In addition to COALESCE I'd like to promote the use of the function CONCAT() which treats NULL values as empty strings >>(it was changed recently, it's probably since 2.10) what makes it very handy.

Example:

NULL || "hello" -> NULL

vs.

CONCAT( NULL , "hello") -> "hello

vs.

COALESCE( NULL, "" ) || "hello" -> "hello"

Cheers,
Matthias

On 09/20/2015 09:54 AM, Phil (The Geek) Wyatt wrote:

Hi Folks,


I am working with LIST Address Points data from http://listdata.thelist.tas.gov.au/>>>opendata/ (Specifically Clarence Municipality) and I need to concatenate into one >>>field the full address of each location. I am struggling to figure out how to do it >>>when there are fields for unit numbers, building names, numbers to and from etc. >>>Many of the fields are also NULL so clearly I want those fields disregarded.


Can someone give me a quick heads up on how to NOT add the data from a field that >>>has NULL?


Chances are I will be doing this regularly so I am keen to document the required >>>expressions for others to use as well.



Cheers - Phil


Volunteer Mapper - Red Cross



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