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integer und text bauen für (empty) where($field, null). Das ergibt "= NULL", was in SQL nie zutrifft; Datensätze mit NULL im Feld fehlen im Suchergebnis. whereNull() erzeugt "IS NULL". Bei Integer-Feldern fällt es besonders auf: "= ''" trifft dort nur die 0, Felder ohne Wert werden gar nicht gefunden.
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integer und text bauen für (empty)
where($field, null).Das ergibt "= NULL", was in SQL nie zutrifft.
Datensätze mit NULL im Feld fehlen im Suchergebnis.
whereNull()erzeugt "IS NULL".Bei Integer-Feldern fällt es besonders auf: "= ''" trifft dort nur die 0, Felder ohne Wert werden gar nicht gefunden.