From 3d919aa577165f15032b0e93c9f409dde0204a69 Mon Sep 17 00:00:00 2001
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Date: Wed, 6 Sep 2023 22:37:54 +0800
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diff --git "a/23 \351\231\210\346\254\243\345\250\201/20230904 \347\254\254\344\270\200\350\212\202\350\257\276\345\277\203\345\276\227.md" "b/23 \351\231\210\346\254\243\345\250\201/20230904 \347\254\254\344\270\200\350\212\202\350\257\276\345\277\203\345\276\227.md"
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+++ "b/23 \351\231\210\346\254\243\345\250\201/20230904 \347\254\254\344\270\200\350\212\202\350\257\276\345\277\203\345\276\227.md"	
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+# 第一节课心得
+
+第一节课的时候， 丘丘教给我们看职场需求，在丘丘的说明下我才发现原来我自身有这么多的不足之处，在新的学期里我必须要增进自身，这样子在出社会时才不会显得如此的手忙脚乱。
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diff --git "a/23 \351\231\210\346\254\243\345\250\201/20230905 \346\225\260\346\215\256\345\272\223\350\277\236\350\241\250\345\212\240\345\277\203\345\276\227.md" "b/23 \351\231\210\346\254\243\345\250\201/20230905 \346\225\260\346\215\256\345\272\223\350\277\236\350\241\250\345\212\240\345\277\203\345\276\227.md"
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+# 笔记
+
+这节课我们学习了Visio使用的方法，同时也让我们模拟学校的数据，让我们利用Visio来创建各种实体。
+
+# 作业
+
+```mysql
+create database minda charset utf8;
+use minda;
+# 院系表
+create table yx(
+    yx_id int primary key ,
+    yx_name varchar(10)
+);
+insert into yx values (1,'软工');
+# 专业表
+create table zy(
+    zy_id int primary key ,
+    zy_name varchar(10),
+    yx_id int,
+    foreign key (yx_id) references yx(yx_id)
+);
+insert into zy values (1,'软件技术',1);
+insert into zy values (2,'wed前端',1);
+insert into zy values (3,'新媒体',1);
+# 班级表
+create table bj(
+    bj_id int primary key ,
+    bj_name varchar(10)
+);
+insert into bj values (1,'软工1班');
+insert into bj values (2,'软工2班');
+insert into bj values (3,'软工3班');
+insert into bj values (4,'软工4班');
+insert into bj values (5,'软工5班');
+insert into bj values (6,'软工6班');
+# 学生表
+create table student(
+    stu_id int primary key ,
+    stu_name varchar(10),
+    zy_id int,
+    bj_id int,
+    foreign key (zy_id) references zy(zy_id),
+    foreign key (bj_id) references bj(bj_id)
+);
+insert into student values (1,'研嵩',1,1);
+insert into student values (2,'佐佐木',1,2);
+insert into student values (3,'金木',1,3);
+insert into student values (4,'独眼枭',2,4);
+insert into student values (5,'有马',3,6);
+# 课程表
+create table kc(
+    kc_id int primary key ,
+    xx_id int,
+    stu_id int,
+    foreign key (xx_id) references xx(xx_id),
+    foreign key (stu_id) references student(stu_id)
+);
+insert into kc values (1,1,1);
+insert into kc values (2,1,2);
+insert into kc values (3,1,3);
+insert into kc values (4,1,4);
+insert into kc values (5,1,5);
+# 选修表
+create table xx(
+    xx_id int primary key ,
+    xx_name varchar(10)
+);
+insert into xx values (1,'Java');
+insert into xx values (2,'MySQL');
+insert into xx values (3,'JS');
+# 老师表
+create table ls(
+    ls_id int primary key ,
+    ls_name varchar(10),
+    xx_id int,
+    bj_id int,
+    foreign key (xx_id) references xx(xx_id),
+    foreign key (bj_id)references bj(bj_id)
+);
+insert into ls values (1,'丘丘',1,1);
+insert into ls values (2,'丘丘',2,2);
+insert into ls values (3,'丘丘',3,3);
+insert into ls values (4,'丘丘',1,4);
+insert into ls values (5,'丘丘',2,5);
+insert into ls values (6,'丘丘',3,6);
+# 查询金木选修的课程、班级、授课老师
+select stu_name,xx_name,a.bj_id,ls_name from student a inner join kc b
+on a.stu_id = b.stu_id
+right join xx c
+on b.xx_id = c.xx_id
+right join ls d
+on c.xx_id = d.xx_id
+where stu_name='金木'
+;
+```
+
-- 
Gitee