selecting random records using a query

  • Thread starter Thread starter Cindy
  • Start date Start date
C

Cindy

I need to query 10% random records from a total of records
from an existing query with a field that is non-
numerical. Someone please help!

Thanks,
Cindy
 
I need to query 10% random records from a total of records
from an existing query with a field that is non-
numerical. Someone please help!
Click to expand...

You can use the Top Values property of a query, with help
from a little VBA. Put this little function into a Module:

Public Function RndNum(vIgnore As Variant) As Double
Static bRnd As Boolean
If Not bRnd Then
'Initialize the random number generator once only
bRnd = True
Randomize
End If
RndNum = Rnd()
End Function

Then add a calculated field to your Query by typing

Shuffle: RndNum([fieldname])

in a vacant Field cell, where [fieldname] is any field in
your table - this forces Access to give a different random
number for each record.

Sort the query by Shuffle, and set its Top Values property
to the number of records you want to see.
 
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