SUMMARY In a database I use secondary tables. One column of the main-table is named "land", using a secondary table "z_bundesland". See attachment Screenshot_table-design.png. If I use a form, the graph works well and shows the value "land". Here see attachments Hueselitz.png and sentences_with_Column_given_by_form.png. If I use the filter with a value from "z_land" as part of the secondary table "land", (SQL-land.png) then then the result is shown in attachment result_of_SQL.png. The column "land" is empty. Searching for a reason, I found an early csv that I used as an ex- or import in or out of kexi. Could this be an invisible rudiment? Attachment Sentences_in_csv_2016.png. Currently these sentences have the invisible value "Sachsen-Anhalt". Confused! OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.15.5 KDE Frameworks Version: 5.59.0 Qt Version: 5.12.3 ADDITIONAL INFORMATION Attachments are privatly sent to Jaroslaw Staniek.