diff --git "a/32 \346\235\250\346\257\205/20230309 \344\275\234\344\270\232.md" "b/32 \346\235\250\346\257\205/20230309 \344\275\234\344\270\232.md"
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index 0000000000000000000000000000000000000000..25856821874fe6094b416cfc417bd1a14f8f4c89
--- /dev/null
+++ "b/32 \346\235\250\346\257\205/20230309 \344\275\234\344\270\232.md"	
@@ -0,0 +1,123 @@
+CREATE DATABASE class0309 charset utf8;
+use class0309;
+
+
+CREATE TABLE stuinfo(
+	stuno VARCHAR(5),
+	stuname VARCHAR(4),
+	stuage int,
+	stuaddress VARCHAR(4),
+	stuseat int,
+	stusex INT
+	);
+	
+	INSERT into stuinfo VALUES 
+	('s2501','张秋利',20,'美国硅谷',1,1),
+	('s2502','李斯文',18,'湖北武汉',2,0),
+	('s2503','马文才',22,'湖南长沙',3,1),
+	('s2504','欧阳俊雄',21,'湖北武汉',4,0),
+	('s2505','梅超风',20,'湖北武汉',5,1),
+	('s2506','李旋风',19,'美国硅谷',6,1),
+	('s2507','陈风',20,'美国硅谷',7,0);
+	
+	CREATE TABLE stuexam(
+		examno int,
+		stuno varchar(5),
+		writtenexam int,
+		labexam int
+		);
+	
+	INSERT into stuexam VALUES 
+	(1,'s2501',50,70),
+	(1,'s2502',60,65),
+	(1,'s2503',86,85),
+	(1,'s2504',40,80),
+	(1,'s2505',70,90),
+	(1,'s2506',85,90);
+	
+	
+	
+	
+	
+-- 	按图片所给的数据进行数据表的建立和数据插入，然后进行以下查询操作
+-- 
+-- 1.查询学生信息表（stuinfo）中所有列信息，给每列取上中文名称
+SELECT stuno '学号',stuname '名字',stuage '年龄',stuaddress '住址',stuseat '座位',stusex '性别' FROM stuinfo;
+-- 
+-- 2.查询学生信息表（stuinfo）中的姓名，年龄和地址三列的信息
+SELECT stuname,stuage,stuaddress FROM stuinfo;
+-- 
+-- 3.查询学生分数表（stuexam）中的学号，笔试和机试三列的信息，并为这三列取中文名字
+SELECT stuno,writtenexam,labexam FROM stuexam;
+-- 
+-- 5.查询学生分数表（stuexam）中的学生的学号，笔试，机试以及总分这四列的信息
+SELECT stuno,writtenexam,labexam,(writtenexam + labexam) FROM stuexam;
+-- 
+-- 6.查询学生信息表（stuInfo）中学生来自哪几个地方 
+SELECT stuaddress FROM stuinfo GROUP BY stuaddress;
+-- 
+-- 7.查询学生信息表（stuInfo）中学生有哪几种年龄，并为该列取对应的中文列名
+SELECT stuage '年龄' FROM stuinfo GROUP BY stuage;
+-- 
+-- 8.查询学生信息表（stuInfo）中前3行记录 
+SELECT * FROM stuinfo LIMIT 3 ;
+-- 
+-- 9.查询学生信息表（stuInfo）中前4个学生的姓名和座位号
+SELECT stuname,stuseat FROM stuinfo limit 0,4;
+-- 
+-- 11.将地址是湖北武汉，年龄是20的学生的所有信息查询出来
+SELECT * FROM stuinfo WHERE stuaddress = '湖北武汉' and stuage = 20;
+-- 
+-- 12.将机试成绩在60-80之间的信息查询出来，并按照机试成绩降序排列
+SELECT * FROM stuexam WHERE labexam BETWEEN 60 and 80 ORDER BY labexam desc;
+-- 
+-- 13.查询来自湖北武汉或者湖南长沙的学生的所有信息
+SELECT * FROM stuinfo WHERE stuaddress = '湖北武汉' or stuaddress = '湖南长沙';
+-- 
+-- 14.查询出笔试成绩不在70-90之间的信息,并按照笔试成绩升序排列
+SELECT * FROM stuexam WHERE writtenexam not BETWEEN 70 and 90 ORDER BY writtenexam asc;
+-- 
+-- 15.查询年龄没有写的学生所有信息
+SELECT * FROM stuinfo WHERE stuname is null;
+-- 
+-- 16.查询年龄写了的学生所有信息
+SELECT * FROM stuinfo WHERE stuname is not null;
+-- 
+-- 17.查询姓张的学生信息
+SELECT * FROM stuinfo WHERE stuname like '张%';
+-- 
+-- 18.查询学生地址中有‘湖’字的信息
+SELECT * FROM stuinfo WHERE stuaddress like '%湖%';
+-- 
+-- 19.查询姓张但名为一个字的学生信息
+SELECT * FROM stuinfo WHERE stuname like '张_';
+-- 
+-- 20.查询姓名中第三个字为‘俊’的学生的信息，‘俊’后面有多少个字不限制
+SELECT * FROM stuinfo WHERE stuname like '__俊%';
+-- 
+-- 21.按学生的年龄降序显示所有学生信息
+SELECT * FROM stuinfo ORDER BY stuage desc;
+-- 
+-- 22.按学生的年龄降序和座位号升序来显示所有学生的信息
+SELECT * FROM stuinfo ORDER BY stuage desc,stuseat asc;
+-- 
+-- 23显示笔试第一名的学生的考试号，学号，笔试成绩和机试成绩
+SELECT examno,stuno,writtenexam,labexam FROM stuexam WHERE writtenexam = (SELECT max(writtenexam) FROM stuexam);
+#SELECT examno,stuno,max(writtenexam),labexam FROM stuexam;
+-- 
+-- 24.显示机试倒数第一名的学生的考试号，学号，笔试成绩和机试成绩
+SELECT examno,stuno,writtenexam,labexam FROM stuexam WHERE labexam = (SELECT min(labexam) FROM stuexam);
+#SELECT examno,stuno,min(labexam),labexam FROM stuexam;
+-- 
+-- 25.查询每个地方的学生的平均年龄
+SELECT avg(stuage),stuaddress FROM stuinfo GROUP BY stuaddress;
+-- 
+-- 26.查询男女生的分别的年龄总和
+SELECT stusex,sum(stuage) FROM stuinfo GROUP BY stusex;
+-- 
+-- 27.查询每个地方的男女生的平均年龄和年龄的总和
+SELECT stusex,sum(stuage),stuaddress,avg(stuage) FROM stuinfo GROUP BY stusex;
+UNION
+SELECT stusex,stuaddress,avg(stuage),sum(stuage) FROM stuinfo GROUP BY stuaddress;
+
+-- 
\ No newline at end of file