RE: [R] R -SQL

From: Gesmann, Markus <Markus.Gesmann_at_lloyds.com>
Date: Wed 18 May 2005 - 22:29:07 EST


Your code looks more like Visual Basic rather than R. What you want is:

for(j in 1:length(criteria$Title)){

sqlstring <- paste("select q.type,crit.Title, r.Value from criteria crit, reply r,question_reply qr, question q, question_criteria qc, form_question fq where qr.reply=r.ID and qr.question=q.ID and qc.question=q.ID and crit.ID=qc.criteria and fq.question=q.ID and fq.form=4 and crit.Title='", criteria$Title[j], "';", sep="")

graphe_par<-sqlQuery(channel,sqlstring)

}

See ?paste

Regards

Markus

Your SQL statement seems to be wrong.

-----Original Message-----
From: r-help-bounces@stat.math.ethz.ch [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Navarre Sabine Sent: 18 May 2005 13:03
To: r-help@stat.math.ethz.ch
Subject: [R] R -SQL

Hello,  

I've got a problem in a sql query!

for(j in 1:length(criteria$Title))

{

    graphe_par<-sqlQuery(channel,"select q.type,crit.Title, r.Value from criteria crit, reply r,question_reply qr, question q, question_criteria qc, form_question fq where qr.reply=r.ID and qr.question=q.ID and qc.question=q.ID and crit.ID=qc.criteria and fq.question=q.ID and fq.form=4 and crit.Title=" & criteria$Title[j] &";")

............}

> criteria$Title

[1] Content Logistic Trainer Supply User contribution Levels: Content Logistic Supply Trainer User contribution

The error is:
Error in "select q.type,crit.Title, r.Value from criteria crit, reply r,question_reply qr, question q, question_criteria qc, form_question fq where qr.reply=r.ID and qr.question=q.ID and qc.question=q.ID and crit.ID=qc.criteria and fq.question=q.ID and fq.form=4 and crit.Title=" & :

        operations are possible only for numeric or logical types In addition: Warning message:
& not meaningful for factors in: Ops.factor("select q.type,crit.Title, r.Value from criteria crit, reply r,question_reply qr, question q, question_criteria qc, form_question fq where qr.reply=r.ID and qr.question=q.ID and qc.question=q.ID and crit.ID=qc.criteria and fq.question=q.ID and fq.form=4 and crit.Title=",

please help me,

Thanks a lot!

Sabine                 


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