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Using MS Access/Calculate PERCENTILE across many fields

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Question
I've been searching many percentile threads and don't see any discussions about multiple columns (all instructions are in regards to row totals. My data looks like this:

PRODUCT   11/1/2015     11/2/2015     11/3/2015
XXX          10          8          20
YYY          1200          0          1400
ZZZ          50          1900          500

What I need is 99% percentile by product My data is 120 columns.
I can do this easily in Excel like =PERCENTILE.INC(N2:EC2,0.99)

Can you help me to replicate in Access?

Answer
This is not good design which is probably the source of your problem. Access is not a spreadsheet and shouldn't be treated like one. Relational database tables should be tall and thin, not wide. Your table should look like this:

tblDailyTotals
DailyTotalID (Primary Key Autonumber)
ProductID (Foreign Key)
TotalDate
Amount

Data in a record should be defined by values not by field names.

Once you have your data in the proper format, you can then use Office Automation to pass the values to the Excel function to return the Percentile. This site has an example:

http://www.mrexcel.com/forum/microsoft-access/237816-does-access-have-percentile

Searching on Access Percentile function returned other examples as well.  

Using MS Access

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Scottgem

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I can answer almost all types of questions relating to Microsoft Access usage and application design. My strengths are database and interface design.

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I've been designing databases for over 25 years working with dBase, FoxPro, Approach and Access.

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Author of Microsoft Office Access 2007 VBA
Techncial Editor for Special Edition Using Microsoft Access 2007 and Access 2007 Forms, Reports & Queries From Que Publishing

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