How to convert sql query into SSRS expression?

I have a query that works, but now I need to make an expression so I can add to a Chart.

SELECT Datepart(day, LogDate) AS DayNum, SUM(Efficiency)/24 AS DayAverage FROM xyz
WHERE CAST(LogDate AS Date) BETWEEN '20150301' AND '20150309'
GROUP BY Datepart(day, LogDate)

Ideas?

Thanks much.

Don.
DonAsked:
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Jim HornMicrosoft SQL Server Data DudeCommented:
Explain for us what the gap is between the T-SQL you have posted above, assuming it works as an SSRS data set fine, and being able to use it in a chart control.
DonAuthor Commented:
Hello,

Yes, the dataset works fine, but I cannot put a second dataset into a CHART.
Microsoft SQL Server Report Designer

Error:  Only fields from the current dataset can be added.

My next idea:

In Chart Data:
Values:  Click +
Select:   Expression

(Here is where I copy and paste by sql statement)

=DATEPART("day", Fields!LogDate.Value) AS DayNum, SUM(Fields!Efficiency.Value) / 24 AS DayAverage
FROM            XYZ
WHERE        (CAST(LogDate AS Date) BETWEEN '20150301' AND '20150309')
GROUP BY DATEPART(day, LogDate)

Problem #1:   Doesn't like AS
Problem #2:   Casting Dates.

Does this help?

Thank you so very much for looking.

p.s.  If you have another idea, please suggest!

Thanks again.
PortletPaulEE Topic AdvisorCommented:
You can avoid the CAST in your where clause by avoiding "between", which you should always do for date ranges:

WHERE       ( LogDate >= '20150301' AND LogDate < '20150310' )

& do please note I pushed the higher date up one day!

see: "Beware of Between"

the best practice with date and time ranges is to avoid BETWEEN and to always use the form:

WHERE col >= '20120101' AND col < '20120201'
This form works with all types and all precisions, regardless of whether the time part is applicable.
Itzik Ben-Gan

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DonAuthor Commented:
Thank you for the Beware of BETWEEN article.
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Microsoft SQL Server 2008

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