Howto add a row number to the output of a Microsoft Access Query

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I have a query that tries to give a serial number the changes of price in a table of articles. This is in order to be able to filter later for example the last 3 prices that a certain article has had and the dates in which they were changed:

SQL

SELECT tblPriceHistory.Article, tblPriceHistory.Date, tblPriceHistory.Price, (SELECT Count(*) FROM tblPriceHistory AS Temp WHERE (Temp.Article=tblPriceHistory.Article) AND (Temp.Date <= tblPriceHistory.Date)) AS ItemNo
FROM tblPriceHistory;

But as soon as I introduce a WHERE clause in the sub-query Access crashes... any hints?

TheTable has 30.121 registers could it be too much for this type of recursive sub-queries?

Thanks for any help,

JBB

Posted 16-Mar-11 4:46am

jbbmovil

Updated 16-Mar-11 4:49am

Henry Minute

v2

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Wendelius 16-Mar-11 12:46pm

Few additional questions:
- adding the WHERE (Temp.Article=tblPriceHistory.Article) AND (Temp.Date <= tblPriceHistory.Date) causes the query to crash or some other WHERE consition?
- do you get any error message?

jbbmovil 17-Mar-11 8:37am

Adding ANY where clause makes Access crash.
The error message is the clasical: MS Access has detected a problem and must close... please send a problem report to MS.

I have finally soved it with a variant of the code that can be found in :
http://easyweb.easynet.co.uk/~trevor/AccFAQ/queries.htm

Thanks,

JBB

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Wendelius · Answer 1 · 2011-03-18T08:42:00

Ok, still don't know why the access crashes since your scalar query is just fine from syntax point of view. Could it be that it doesn't like the Temp-alias, doesn't understand the correlation etc.

However, having a closer look at your query, could you use just a simple group by-query. SOmething like:

SQL

SELECT a.Article, 
       a.Date, 
       a.Price, 
       count(*)
FROM tblPriceHistory a left join tblPriceHistory b
     on (a.Article=b.Article and b.Date <= a.Date)
group by a.Article,
       a.Date,
       a.Price