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05.24.2007 at 10:26AM PDT, ID: 22593056
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Syntax of SQL Expression Fields in Crystal Reports 11

Tags: crystal, sql, expression, reports, fields
Hi Experts,

I'm trying out SQL Expression Fields in Crystal Reports 11 but I'm not having any luck.

The report is showing records from a table called Candidates.  There is also table Education.  One record in Candidates has many records in Education.  
The tables link on Candidates.CandidateID = Education.CandidateID

I simply want to show in the report, for each record in Candidates table, how many education records are there.  The SQL Query would look like this:

SELECT COUNT(Education.CandidateID)
FROM Education
WHERE Education.CandidateID = X

Where X is the CandidateID of the record in the details section.  I just cannot get this query converted to syntax accepted by the SQL Expression Field in Crystal!  I keep getting the same error message in Crystal when saving that states there is incorrect syntax near the keyword select.

Thanks
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Question Stats
Zone: Database
Question Asked By: PantoffelSlippers
Solution Provided By: rhinok
Participating Experts: 2
Solution Grade: B
Views: 395
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05.24.2007 at 10:50AM PDT, ID: 19151278

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05.24.2007 at 11:20AM PDT, ID: 19151532

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05.24.2007 at 11:43AM PDT, ID: 19151697

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05.27.2007 at 02:41AM PDT, ID: 19163891

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05.27.2007 at 12:56PM PDT, ID: 19165141

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05.24.2007 at 10:50AM PDT, ID: 19151278

Rank: Genius

Do you have the table Education linked in the main report?

Can you group on Candidates.CandidateID and use a summary (count for Education.CandidateID) to get the count you want?

WHat have you tried for X

SELECT COUNT(Education.CandidateID) AS countCandidate
FROM Education
WHERE Education.CandidateID = {Candidates.CandidateID}

mlmcc
 
05.24.2007 at 11:20AM PDT, ID: 19151532
Thanks mlmcc

This is my current syntax copied from the Formula Workshop:

Select Count(Education.CandidateID) AS EducationCount
From "Education"
Where "Education"."CandidateID" = {Candidates.CandidateID}

I do have Candidates and Education linked in the report.
 
05.24.2007 at 11:43AM PDT, ID: 19151697

Rank: Sage

The syntax depends on a combination of two things:

1)  Your database

2)  Your method of connectivity to your databaes (ODBC Vs. OLEDB Vs. JDBC etc...)

Here's an example of Syntax I would use with SQL Server via ODBC (the parentheses are required, btw):

(
SELECT
  COUNT(CandidateID)
FROM
  EDUCATION
WHERE
  CandidateID = "Candidates"."CandidatesID"
)

There's no reason to alias the field since the SQL Expression field name is what will be used on the report (just like a formula).

Also, notice the difference between the fields in the WHERE clause.  CandidateID comes from the Education table.  There's no reason to preface it with the table, since only one table is used.  "Candidates"."CandidatesID" is formatted automatically when you select it from the field tree in the editor.  This correlates the SQL Expression (essentially a subquery) to records in the report.

I have a .ppt presentation about SQL Expression fields on the files page of my website:

http://acuityreporting.com/files.aspx

~Kurt
Accepted Solution
 
05.27.2007 at 02:41AM PDT, ID: 19163891
I found my answer in  Kurt's Power Point Presentation on SQL Expression Fields:

The solution is: different back-ends require slightly different syntax.  In my case, SQL Server required that my SQL Expression was contained inside parantheses.

Thanks Kurt.
 
05.27.2007 at 12:56PM PDT, ID: 19165141

Rank: Sage

Glad I could help!

~Kurt
 
 
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