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I am using QGIS 3.22.16, I try to select similar 'null' value in 2 different field. I tried the solutions suggested from one this exchange. Selecting features with equal values in different fields in QGIS None of these solution worked.

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    Please be more precise when saying "none of these solution worked". What exactly have you tried? What did/didn't happen?
    – Erik
    Commented Mar 22, 2023 at 14:38
  • I used the operator "Like" and "=" between the 2 fields. As well as the operator "To_int".
    – GIS Noh
    Commented Mar 22, 2023 at 14:49
  • I even tried the Regexp match and trim functions in the expression box. No data have been selected in the table.
    – GIS Noh
    Commented Mar 22, 2023 at 14:54

1 Answer 1

Reset to default
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You can use is null:

"Tree_Wor1" is null and "Tree Wor_1" is null
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    Perfect, it worked .
    – GIS Noh
    Commented Mar 22, 2023 at 15:33

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