Question

我不知道问题是什么。有什么想法吗？我尝试从评分表中更新我的first_q列。

UPDATE gradings g set g.first_q = 90 FROM gradings
INNER JOIN subjects ss
on ss.subject_id = g.subject_id
INNER JOIN students s
ON s.id = g.student_id
INNER JOIN school_years sy
on sy.id = g.sy_id
INNER JOIN teachers t
on t.id = g.teacher_id
WHERE s.id = 1;

Answer 1

语法错误。也许你应该尝试这样的事情：

更新评分g INNER JOIN科目ss 在ss.subject_id = g.subject_id上 INNER JOIN学生 ON s.id = g.student_id INNER JOIN school_years sy 在sy.id = g.sy_id上 INNER JOIN老师在t.id = g.teacher_id上设置g.first_q = 90 WHERE s.id = 1;

MYSQL Update Statement Inner Join Tables

Answer 2

我相信你可以删除FROM gradings并将JOIN放在SET

之前

带有INNER JOIN的MySQL Update语句

2 个答案: