How to delete value from data collection?

Reply to How to delete value from data collection? on Thu, 16 Apr 2026 12:51:35 GMT

sqk — Thu, 16 Apr 2026 12:51:35 GMT

Thanks so much Filipp, I looked in the documentation but hadn't noticed it,
Alessio.

Filipp Sudanov — Thu, 16 Apr 2026 12:00:06 GMT

You can do

return DataCollection::ERROR;

this will prevent storing of a value into the DB, DCI will show .

sqk — Wed, 15 Apr 2026 10:29:19 GMT

I successfully deleted the data from the DB, but invalid values continue to arrive from the device...

Is there a way to filter and invalidate them directly as a transformation script?

I tried replacing them with NULL, but they appear as "zero" values in the graphs...

Thanks in advance,
ALessio.

sqk — Fri, 20 Mar 2026 12:42:25 GMT

Thanks Alex, i'll give it a try...

alk — Fri, 20 Mar 2026 10:48:45 GMT

You can delete is directly from the database, it's stored in the table idata_N, where N is node id (e.g. idata_100).

Item ID can be found in table items (filter by node_id and name / description)