Second, thanks so much Rory for simplifying it and answering that anyway. I promise I wasn't going for technical impressiveness and easier is definitely better!
Thanks again, Jack On 9 Mar 2005, at 02:19, Rory McKinley wrote:
Jackson Linux wrote:Hi, all,
I have three tables; 'cv', the main table, 'jobcat', a definition table and 'cvjobcats', an intersection table (for more detail see PS below).
I'd like to join this all together to be able to make a headline consisting of the plain English description of the job category followed by all rows within cv which contain a reference to that job category
I can follow this only to a point and that is where I ask for the List's help - does this even resemble the beginnings of what I want to accomplish? I've tried to comment as I go for my own sanity
//Select columns from 'cv', whose 'category' references numbers
//Select 'category' from 'jobcat' to translate the numbers to English
"SELECT cv.cv_id,
cv.category,
dates,
cv.job_title,
cv.company,
cv.job,
jobcat.category
FROM cv
LEFT JOIN cvjobcats
ON cvjobcats.cv=cv.cv_id //Let tables cv and jobcat understand each other.
//This next bit I'm confused about
LEFT JOIN jobcat
ON jobcat.jobcat_id=cvjobcats.jobcat
WHERE
cvjobcats.jobcat='4'";
Great. I'm now lost. Can anyone advise?
Thanks in advance,
PS:
<far too much information>
cv contains columns including an primary key ('cv_id') and a column called 'category' which refers to job categories by number.
jobcat contains two fields: a primary key (jobcat_id) and a plain english description
cvjobcat contains two key columns: 'cv_id' and 'jobcat_id'.
</far too much information>
Hello Jackson
Are there any circumstances under which the cvjobcats table would have a job category entry that does not appear in the jobcats table? IF not, you really don't need to use the LEFT JOINS. Instead you coudl do something like this:
SELECT cv.cv_id,cv.category,dates,cv.job_title,cv.company,cv.job, jobcat.category
FROM cv, cvjobcats, jobcats
WHERE cvjobcats.cv=cv.cv_id AND cvjobcats_jobcat = 4 AND jobcat.jobcat_id=cvjobcats.jobcat
Less technically impressive perhaps but easier to follow ;)
Regards
Rory
-- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
