Sumif in Access

I am using the formula Abs(Sum([Booked]=Yes)) which is correctly summing where the Booked = yes. I would like it to only sum if the Booked = yes AND ClientType = "1".

Is there a way to do that? I don't want to change the entire query because another column will need ClientType = 3.

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Shaun KlineLead Software EngineerCommented:
Try using the IIF statement:
ABS(Sum(IIF([Booked] = Yes and [ClientType]="1", 1, 0)))

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The above should work, but you can simplify it a little:

Abs(Sum([Booked]=Yes AND  [ClientType]="1") )

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However, if ClientType is numeric you should drop the quotes:

Abs(Sum([Booked]=Yes AND  [ClientType]= 1) )

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Microsoft Access

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