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我有一个相当复杂的查询,它根据子查询对结果进行排序。这工作正常。查询如下。从子查询追加字段
SELECT enrollments.*, users.*
FROM enrollments
INNER JOIN users
ON enrollments.user_id = users.id
WHERE enrollments.preview = FALSE
ORDER BY (
SELECT COUNT(progress_tracker)
FROM progress_tracker
WHERE progress_tracker.enrollment_id = enrollments.id
AND progress_tracker.completed = TRUE
)
这里我从用户和注册表中选择字段。理想情况下,我希望在sql结果中有更多的字段。此字段表示ORDER BY sql的结果:
SELECT COUNT(progress_tracker)
FROM progress_tracker
WHERE progress_tracker.enrollment_id = enrollments.id
AND progress_tracker.completed = TRUE
是否可以从此查询创建一个字段并将其附加到每行的结果中?该行的名称将被适当地称为enrollment_progress_tracker_completed_count
。如果是这样,我该怎么做?
哇,超爽。谢谢! – jason328