How to include row count in report

I have a report which shows list of available classes for students to register. One table called reg (which is not included in the report) keeps student_id and class_id numbers so that we know who signed up for which class.
I'd like to count rows in the reg table and group them by classid and then include results in the report so that we know how many students already signed up for each class. How can I do that?

I assume that you are providing the report with some SQL to pull in the available classes. Why don't you put in a sub select where you are doing a count on the other table?
So for example,
SELECT a.CLASSID, a.CLASSNAME, (SELECT COUNT(*) FROM STUDENTS where CLASSID = a.CLASSID ...Your group by, etc...) as Current FROM CLASSES

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The like operator requires a string operand.
http://msdn.microsoft.com/en-us/library/ms179859.aspx
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http://www.sqlusa.com/bestpractices/datetimeconversion/
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http://www.sqlusa.com/bestpractices2005/alltablesrowcount/
Kalman Toth Database & OLAP Architect
SQL Server 2014 Design & Programming
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

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hi
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Reward points if useful.

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Ben
Message was edited by:
Benton

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ABunker,
It appears that in the past few days you have not received a response to your
posting. That concerns us, and has triggered this automated reply.
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Environment: SQL Server 2008 R2
Purpose: Track number of records, which were loaded into each destination, entity tables or affected by data transaction. Record each table name and the number of records for each table.
Code:
CREATE TABLE dbo.PkgAudit
PkgAuditID INT IDENTITY(1, 1),
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Click here
The first one as below
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~ I tried to load more than picture but the editor allows only 2 pic per post. hope MSDN peeps improve it

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Mike Yin
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