我嘗試以下query..but它不工作我們可以將字段中的值用作使用as關鍵字檢索的數據的標題嗎?
SELECT course_id as a,
sub1 as (SELECT subj1
FROM stu_subject
WHERE course_id = a.course_id),
sub2 as (SELECT subj2
FROM stu_subject
WHERE course_id = a.course_id),
sub3 as (SELECT subj3
FROM stu_subject
WHERE course_id = a.course_id)
FROM stu_mark_list
WHERE course_id=(SELECT course_id
FROM stu_mark_list
WHERE course_id = a.course_id)
您是否正在嘗試逆向工程? – AK47