If anyone can help me rewrite my query to work in mysql 5 I would be very grateful. If anyone can provide links to solid, simple tutorials on how to rewrite old queries that would also be great.
My current (version 4) query looks like this:
SELECT
course.course_code,
course.course_title_sv AS course_title,
course.course_u_credits,
course.course_successive_level_scb_id,
s.successive_level_scb_order,
s.successive_level_scb_code,
LEFT (education_level.edu_level_name_sv, 1) AS course_edu_level, course.course_level,
GROUP_CONCAT(DISTINCT h.head_area_hv_title_sv SEPARATOR ', ') AS head_area_hv
FROM
course, course_event, course_event_package_links, package, education_level
LEFT JOIN
course_has_head_area_hv ON(course.course_id = course_has_head_area_hv.course_id)
LEFT JOIN
head_area_hv h ON(h.head_area_hv_id = course_has_head_area_hv.head_area_hv_id)
LEFT JOIN
successive_level_scb s ON(s.successive_level_scb_id = course.course_successive_level_scb_id)
WHERE
course.course_edu_level=education_level.edu_level_id AND
course.course_id=course_event.course_id AND
course_event.course_event_id=course_event_package_links.course_event_id AND
course_event_package_links.package_id=package.package_id AND
course.course_successive_level_scb_id != '' AND
package.package_id='6318'
GROUP BY course.course_id
Simply replace
SELECT ...
FROM course, course_event, course_event_package_links
...
WHERE course.course_id=course_event.course_id
AND course_event.course_event_id=course_event_package_links.course_event_id
by
SELECT ...
FROM course
JOIN course_event ON course_event.course_id = course.course_id
JOIN course_event_package_links
ON course_event_package_links.course_event_id = course_event.course_event_id
...
About your error message, are you sure course.course_id
exists? Maybe it was replaced by course.course_code
?