find unique items

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Hello Access experts,

I try using query below to find the unique items in a Field but it doesnt work. Can someone help me with this query?

Thanks very much in advance.

In (SELECT [project_item] FROM [Table1] As Tmp GROUP BY [project_item] HAVING Count(*)=1 )

 

[Moniker]

SELECT DISTINCT [project_item] FROM [Table1];

 

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Thank you very much