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查询进阶 - 关联查询 - cross join #14

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bailh opened this issue Aug 6, 2023 · 0 comments

bailh commented Aug 6, 2023

answer is ：select s.name student_name, s.age student_age, s.class_id class_id, c.name class_name from student s, class c;
并未用到cross join

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