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R -SQL
2 messages · Navarre Sabine, Brian Ripley
You have not told us what package you are using (and I think this is a
repeat of a post also missing that crucial information).
However, the main problem appears to be that you think & operates on
character strings. You have not told us your intentions, which might have
been
paste("select ... crit.Title=", criteria$Title[j], ";", sep="")
On Wed, 18 May 2005, Navarre Sabine wrote:
Hello,
I've got a problem in a sql query!
for(j in 1:length(criteria$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=",
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595