How to count number of occurrences of data subject to a condition

I have a table containing sales leads. Each lead has a type, salesperson and a date created. I have a report showing total number of leads of type A against each salesperson - this is done by using the select expert to filter the leads to include only type A.

My problem is I want a second column to show the number of leads of type A which have a date created value that falls within a date range that I am entering as a parameter field. This is effectively a subset of the first column data. Is there an easy way to do this?
rjm2803Asked:
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petr_hlucinCommented:
The attached code snippet should help.
select count(*) as sales_count, salesperson
from sales
group by salesperson;

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peter57rCommented:
It sounds like you could use a running totals field for this.

Count any field , reset on change of group and for the evaluate when use a formula that says something like:

{table.datefield} in {?dateparam}
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mlmccCommented:
Agree with the running total idea.

You could also use a simple formula that tests for meeting the conditions

If ({DateFIeld} in {?DateParam}) then
    1
else
    0

You can then use the summary functions on the formula to get the count.

mlmcc
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rjm2803Author Commented:
Thanks for that  - simple and works well
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