Crystal Report group on max date

In Crystal Report XI R2 I have a main report and in it I  have sub report.  In sub report I have next fields:  
- Student_ ID ,
- Student _Action_ Date,
- Note_ Date
- Note.
One student could have on one student Action Date several notes , each note has its note date.
So I need to pull out one field (Note).

Note for each student on Latest Action date that has latest Note_Date (Date time) value.
I assume that I should make two groups First group :  Studen_ID  (this is link field with main report) , Second group :Student _Action _Date. Somehow I need max Student _Action_Date and Max Note_Date.
How to arrange selection criteria to get this result?
TarasAsked:
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mlmccCommented:
You cannot group on the max date since it would be calculated after the grouping is done.

Are you trying to just show the name and last action and last note for that action for a given person?
If so you can group on the person then sort by the action date descending and the note date descending.

Put the information in the group header and suppress the details

mlmcc
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TarasAuthor Commented:
??
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TarasAuthor Commented:
Hi mlmcc
Yes I am trying to do that. I need just to show field “Note”. It means I need to pass this value in main report. I know how to do this by shared variable. That is not problem.
However.
It is clear what you are saying about group on person then sort by action date descending and note date descending,  but I am not sure what you mean when you said "put the information in group header".
Which information, which field? Do you mean “Note” or something else to put in group header.
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mlmccCommented:
The infrmation you wish to show.

mlmcc
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James0628Commented:
mlmcc is talking about a situation where you are just displaying the data in a report (or subreport).  If you already have a group on Student _Action _Date, then you just need to have that group sort descending, and then add a sort on Note_Date, also descending.  Then if you put the Note field in the Student_ ID group header, you will only see the note from the first record in the group, which will be the one with the latest Student _Action _Date and Note_Date.

 But it sounds like instead of just displaying the note, you're reading this data in a subreport, and you want to pass the note back to the main report in a shared variable.  In that case, you would just sort the records in the subreport as described, and then set your shared variable in the Student_ ID group header.

 James
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TarasAuthor Commented:
Thanks both for help and explanation what is happening.
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James0628Commented:
You're welcome.  Glad I could help.

 James
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