mgt4rwg
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Min/Max Date-Time Stamp Sorting
I have an ODBC Access data source that has data structured in this format: Product ID, Value 1, Value 2, Value 3, Date-Time Stamp of when values were recorded. The product ID repeats several times as readings are taken at different times - i.e., I have multiple entries for each ID. I want to report in summary style, only the minimum and maximum date-time records with associated values in Crystal Reports. Can anyone provide me an explanation that would allow me to summarize in this fashion?
Do you want the min and max for *each* product ID?
What version of Crystal are you using and how are you getting your result set (i.e. SQL Query or wizard)?
If you are using a SQL query, please post it and we'll take a look. :)
However you populate your result set, the answer is going to be along the following idea. You'll need to add a condition (for example, a where clause at the end of your select) that sets the data equal to the max OR the min.
In pseudo-SQL, something like:
SELECT <data> FROM <table> WHERE <date-time stamp> = (SELECT MAX(date-time stamp) from <table>)
OR <date-time stamp> = (SELECT MIN(date-time stamp) from <table>)
This will grab the high and low regardless of product id. If you want this info for each product id, it's a little bit more complicated, but still doable.
Again, if you post the info asked for above, maybe we can give you a more concise answer.
Don
What version of Crystal are you using and how are you getting your result set (i.e. SQL Query or wizard)?
If you are using a SQL query, please post it and we'll take a look. :)
However you populate your result set, the answer is going to be along the following idea. You'll need to add a condition (for example, a where clause at the end of your select) that sets the data equal to the max OR the min.
In pseudo-SQL, something like:
SELECT <data> FROM <table> WHERE <date-time stamp> = (SELECT MAX(date-time stamp) from <table>)
OR <date-time stamp> = (SELECT MIN(date-time stamp) from <table>)
This will grab the high and low regardless of product id. If you want this info for each product id, it's a little bit more complicated, but still doable.
Again, if you post the info asked for above, maybe we can give you a more concise answer.
Don
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AnswerTheMan,
I would agree with you if this were a particularly exotic query. For this kind of thing, though, I've found Crystal to be adequate. But whether mgt4rwg does it in Crystal or with code, he/she is probably going to need to know how to do the query.
Even so, instead of a temp table (can you even do that in Access?) I would just set up a query in Access and link to that through Crystal.
mgt4rwg,
If you post the kind of info I asked for above, one of us will be happy to look at it.
Don
I would agree with you if this were a particularly exotic query. For this kind of thing, though, I've found Crystal to be adequate. But whether mgt4rwg does it in Crystal or with code, he/she is probably going to need to know how to do the query.
Even so, instead of a temp table (can you even do that in Access?) I would just set up a query in Access and link to that through Crystal.
mgt4rwg,
If you post the kind of info I asked for above, one of us will be happy to look at it.
Don
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