Random selection from Crystal

[Myv]

Hello
I've created a Crystal report which returns about 200,000 records. I now need to select a random sample of 10,000 records from that. Does anyone have any suggestions? I've tried using the TopN function but that was unsuccessful.
Can anyone help?

Thanks

Myv

 

[lbass]

Place the following formula (@random} in your detail section:

rnd()

Then use {@random} to sort your report ascending.

Finally, go to format->section->details->suppress and enter:

recordnumber > 10000

-LB

 

[Myv]

Thanks LB for your help but I'm sorry - I don't follow it all.
I've gone into the select expert and the chosen "show formula" and then "formula editor".
My formula at the moment is as follows:
{CBCONHPF.THCRST} = "A" and
{CBBSECPF.BSBSDS} = "Residential" and
{CBCONHPF.THOWTY} <> 3.00 and
{CBCONHPF.THCOMP} = &quot;01&quot;

Where do I put the {@random} command?

I understand your second instruction about format, section, details and suppress.

Finally, where do I enter: recordnumber > 10000?


Thanks in advance

Myv

 

[lbass]

You do not do this in the select statement.

1-Create a formula using the random function by going to insert->formula field->new->name it &quot;random&quot; and enter:

Rnd()

2-Place the formula {@random} on the report in the details section.

3-Then go to report->sort records and add {@random} as the sort field.

4-Then go to format->section->details->suppress (you don't need to check it)->x+2 button to the right (this is the formula area for section suppression) and enter:

recordnumber > 10000

-LB

 

[synapsevampire]

This is Crystal version dependent, here's a FAQ from Ido and the old version whitepaper:

faq767-3260

Old versions:

http://support.businessobjects.com/library/kbase/articles/c2000640.asp

-k