smallkun/class-notes
smallkun/class-notes
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smallkun 2025-03-07 10:01:02 +08:00
parent 8c0d6360a2
commit 70d5054036
1 changed files with 3 additions and 3 deletions
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2207/天天乐学答案/合卷-1.md
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@ -246,7 +246,7 @@ SET t.teacher_age = 36
WHERE t.teacher_name = '王老师'; WHERE t.teacher_name = '王老师';
#5 tj11 #5 tj11
SELECT MAX(t.age) SELECT MAX(t.teacher_age)
FROM tb_teacher t; FROM tb_teacher t;
#6 tj12 #6 tj12
@ -258,8 +258,8 @@ where s.class_id = c.class_id AND c.teacher_id = t.teacher_id;
CREATE VIEW v_teacher AS CREATE VIEW v_teacher AS
SELECT c.class_name, t.teacher_name, COUNT(*) SELECT c.class_name, t.teacher_name, COUNT(*)
FROM tb_teacher t, tb_student s, tb_class C FROM tb_teacher t, tb_student s, tb_class C
where s.class_id = c.class_id AND c.teacher_id = t.teacher_id WHERE s.class_id = c.class_id AND c.teacher_id = t.teacher_id
GROUP BY c.class_id; GROUP BY c.class_id, t.teacher_name;
#8 #8
DELIMITER $$ DELIMITER $$