diff --git "a/\351\231\210\346\255\243\346\245\240/.keep" "b/\351\231\210\346\255\243\346\245\240/.keep"
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index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\351\231\210\346\255\243\346\245\240/20230905.md" "b/\351\231\210\346\255\243\346\245\240/20230905.md"
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@@ -0,0 +1,14 @@
+```
+心得；
+
+学习到了新知识，可以使用vip解析，获得破解版本。
+了解到盘搜搜这个好东西  可以 共享到好多的资源。
+学到了visio软件 
+对自己新的学期有了新的目标
+知识越来越深入，要加强学习，不断努力。希望自己可以持之以恒
+```
+
+
+
+
+
diff --git "a/\351\231\210\346\255\243\346\245\240/20230906.md" "b/\351\231\210\346\255\243\346\245\240/20230906.md"
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+```mysql
+create DATABASE school charset utf8;
+
+use school;
+
+
+create table college(
+college_id int PRIMARY key,
+college_name varchar(10)
+);
+
+insert into college values
+(1,'软工学院');
+(2,'智能学院');
+
+
+
+create table profe(
+profe_id int PRIMARY key,
+profe_name varchar(10),
+college_id int,
+FOREIGN key(col_id) REFERENCES college(college_id)
+);
+
+insert into profe values
+(1,'软件技术',1);
+(2,'软件技术',2)
+
+
+create table class(
+class_id int ,
+class_name varchar(10),
+profe_id int,
+FOREIGN key(profe_id) REFERENCES profe(profe_id)
+);
+
+insert into class values
+(1,'一班',1),
+(2,'二班',1),
+(3,'三班',1);
+
+
+
+create table student(
+student_id int PRIMARY key,
+student_name varchar(10),
+class_id int,
+FOREIGN key(class_id) REFERENCES class(class_id)
+);
+
+insert into student values
+(1,'小黄',1),
+(2,'小粉',2),
+(3,'小紫',3);
+
+create table course(
+course_id int ,
+course_name varchar(10)
+);  
+
+insert into course values
+(1,'JAVA'),
+(2,'MYSQL'),
+(3,'c++');
+
+
+
+
+create table ke(
+kecheng_time varchar(10),
+class_id int,
+FOREIGN key(class_id) REFERENCES class(class_id)
+);
+
+
+insert into ke values
+('周一',1),
+('周二',2),
+('周三',3);
+
+
+create table teacher(
+teacher_id int,
+teacher_name varchar(10),
+couse_id int,
+FOREIGN key(couse_id) REFERENCES course(couse_id)
+);
+
+insert into teacher values
+(1,'大大',1),
+(2,'水水',2),
+(3,'低低',3);
+
+
+
+
+
+笔记
+
+一对一的关系
+
+将其中任一表中的主键，放到另一个表当主键
+
+一对多的关系
+
+将一所在的表的主键放到多的表当外键
+
+多对多的关系
+
+必须第三张表，将前面两个表的主键放进来当外键
+
+
+
+
+```
+
+
+
+
+