'DateDiff isn't working in my access query

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My query in MS-access 2013:

Delta : DateDiff("n", [C], [D])

The error is french for "Expression syntax is invalid"



Solution 1:[1]

Try using the field names directly in the expression.

i.e date d reception and courriel de confirmation instead of D and C.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Sola Oshinowo