Solved

"Invalid Use Of Null" using CDate

Posted on 2004-10-08
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905 Views
Last Modified: 2008-02-01
Hi All,

I have a date/time field in a table which is converted within a query from a string value via the following:

New Date Field: Int(CDate([Original Date Field]))

The problem is, I cannot view the query in design view if any records do not have data within the date field -- I get a "Invalid Use Of Null" error message.  This field will not always contain data, therefore, I need some way to work around this.

Suggestions?

Thanks,
Ed
0
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Question by:MICHAED
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8 Comments
 
LVL 51

Assisted Solution

by:Ryan Chong
Ryan Chong earned 50 total points
ID: 12261748
try:

New Date Field: IIF(IsDate([Original Date Field]) ,  Int(CDate([Original Date Field])) , 0)
0
 
LVL 120

Assisted Solution

by:Rey Obrero (Capricorn1)
Rey Obrero (Capricorn1) earned 50 total points
ID: 12261852
or

New Date Field: IIF(([Original Date Field])Is Null ,"",  Int(CDate([Original Date Field])))
0
 

Author Comment

by:MICHAED
ID: 12261857
Hi,

I'm getting "Invalid Operator" so I'm trying to find the expression's error....
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LVL 11

Expert Comment

by:Jokra_the_Barbarian
ID: 12261869
Alternatively, you can avoid the IIF function by using:
     Format(Nz([Original Date Field], ""), "mm/dd/yy")
0
 

Author Comment

by:MICHAED
ID: 12261945
Jokra, will your function convert my date/time field ...or leave it as a string?
0
 

Author Comment

by:MICHAED
ID: 12261978
Folks, I've tried all suggestions -- and I do not get the error anymore.  However, the sort order is incorrect...it appears that the field is sorting like a string field rather than a date field.
0
 
LVL 41

Accepted Solution

by:
shanesuebsahakarn earned 150 total points
ID: 12262000
Try:

New Date Field: IIf(IsNull([Original Date Field]),Null,Int(CDate([Original Date Field])))
0
 

Author Comment

by:MICHAED
ID: 12262032
Shane's version worked -- thanks all!

Ed
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