diff --git "a/37\345\274\240\346\255\243\350\261\252/.keep" "b/37\345\274\240\346\255\243\350\261\252/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/37\345\274\240\346\255\243\350\261\252/2022-09.26\350\247\206\345\233\276\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql" "b/37\345\274\240\346\255\243\350\261\252/2022-09.26\350\247\206\345\233\276\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..fac0f2ee4719afda10caf461462bccb9cc49e5e5
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/2022-09.26\350\247\206\345\233\276\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,30 @@
+--编写视图实现查询出所有银行卡账户信息，显示卡号，身份证，姓名，余额。
+create view v_information
+as
+select AccountCode,CardNo,RealName,CardMoney from AccountInfo inner join BankCard on BankCard.AccountId=AccountInfo.AccountId
+go
+select * from v_information
+drop view v_information
+
+
+
+--行转列
+create table huatai(
+	year int,
+	month int,
+	amount float
+)
+
+insert into huatai(year,month,amount) values (1991,1,1.1)
+insert into huatai(year,month,amount) values (1991,2,1.2)
+insert into huatai(year,month,amount) values (1991,3,1.3)
+insert into huatai(year,month,amount) values (1991,4,1.4)
+
+insert into huatai(year,month,amount) values (1992,1,2.1)
+insert into huatai(year,month,amount) values (1992,2,2.2)
+insert into huatai(year,month,amount) values (1992,3,2.3)
+insert into huatai(year,month,amount) values (1992,4,2.4)
+
+select * from huatai
+
+select * from huatai pivot(max(amount) for month in ([1],[2],[3],[4])) a
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/2022-09.26\350\247\206\345\233\276\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt" "b/37\345\274\240\346\255\243\350\261\252/2022-09.26\350\247\206\345\233\276\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..c7f3301916cfd0ee4805e5508ef3477329b74444
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/2022-09.26\350\247\206\345\233\276\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
@@ -0,0 +1,27 @@
+瑙嗗浘
+
+鍒涘缓瑙嗗浘
+
+    create view V_name as select row_name from table_name
+
+鍒犻櫎瑙嗗浘
+
+    drop view V_name
+
+###  union
+
+    SELECT _column_name(s)_ FROM _table1_  
+    UNION  
+    SELECT _column_name(s)_ FROM _table2_
+
+### union all
+
+    SELECT _column_name(s)_ FROM _table1_  
+    UNION ALL  
+    SELECT _column_name(s)_ FROM _table2_
+
+### unpivot
+
+select  from Sales
+
+    unpivot (Amount for people in (A1,A2,A3,A4) as a
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/DBTEST.sql" "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/DBTEST.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..afff8826659878a9f09e71c34eda54468501b6b9
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/DBTEST.sql"
@@ -0,0 +1,225 @@
+if exists(select * from sys.databases where name='DBTEST')
+drop database DBTEST1;
+go
+
+create database DBTEST1;
+go
+
+use DBTEST1;
+go
+
+--创建部门表
+create table Department 
+(
+	--创建部门编号;int代表整数类型;primary key代表主键;identity(1,1)代表从1开始步长为1自增长;
+	DepartmentId int primary key identity(1,1),
+	--创建部门名称;nvarchar(50)代表长度50的字符串;not null代表不能为空;
+	DepartmentName nvarchar(50) not null,
+	--创建部门描述；text代表长文本;
+	DepartmentRemark text
+);
+go
+
+--创建职级表，rank为系统关键字，此处使用[]代表自定义名字，而非系统关键字
+create table [Rank]
+(
+	RankId int primary key identity(1,1),
+	RankName nvarchar(50) not null,
+	RankRemark text
+);
+go
+
+--创建员工信息表
+create table People
+(
+	PeopleId int primary key identity(1,1),
+	--references代表外键引用,此字段必须符合与其它表的外键约束
+	DepartmentId int references Department(DepartmentId)  not null,
+	RankId int references [Rank](RankId) not null,
+	PeopleName nvarchar(50) not null,
+	--default代表字段默认值; check可以规定字段值的约束条件;
+	PeopleSex nvarchar(1) default('男') check(PeopleSex='男' or PeopleSex='女') not null,
+	PeopleBirth datetime not null,
+	PeopleSalary decimal(12,2) check(PeopleSalary>= 1000 and PeopleSalary <= 100000) not null,
+	--unique代表唯一约束，为数据提供唯一性保证;
+	PeoplePhone nvarchar(20) unique not null,
+	PeopleAddress nvarchar(100),
+	--datetime和smalldatetime都可以表示时间类型，getdate()用于获取系统当前时间
+	PeopleAddTime smalldatetime default(getdate())
+);
+go
+
+
+
+------------------------------插入数据部分------------------------------
+--部门表插入数据
+insert into Department values('行政部','公司主管行政工作的部门');
+go
+
+--一次性插入多条数据
+insert into Department(DepartmentName,DepartmentRemark)
+select '市场部','吹牛的部门' union
+select '产品部','天马星空的部门' union
+select '总经办','都是领导的部门' ;
+go
+
+-------职级表插入数据
+insert into [Rank](RankName,RankRemark)
+values('初级','辅助其他人完成任务')
+insert into [Rank](RankName,RankRemark)
+values('中级','具备独立处理事务的能力')
+insert into [Rank](RankName,RankRemark)
+values('高级','具备可以带动全场节奏的能力');
+go
+
+---------向员工表插入数据
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,3,'刘备','男','1984-7-9',20000,'13554785452','成都',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,2,'孙尚香','女','1987-7-9',15000,'13256854578','荆州',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,1,'关羽','男','1988-8-8',12000,'13985745871','荆州',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(2,1,'张飞','男','1990-8-8',8000,'13535987412','宜昌',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(2,3,'赵云','男','1989-4-8',9000,'13845789568','宜昌',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(3,3,'马超','男','1995-4-8',9500,'13878562568','香港',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(3,2,'黄盖','男','1989-4-20',8500,'13335457412','武汉',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(3,1,'貂蝉','女','1989-4-20',6500,'13437100050','武汉',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(2,2,'曹操','男','1987-12-20',25000,'13889562354','北京',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(2,3,'许褚','男','1981-11-11',9000,'13385299632','北京',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(2,1,'典韦','男','1978-1-13',8000,'13478545263','上海',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,1,'曹仁','男','1998-12-12',7500,'13878523695','深圳',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,3,'孙坚','男','1968-11-22',9000,'13698545841','广州',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(3,3,'孙策','男','1988-1-22',11000,'13558745874','深圳',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(3,2,'孙权','男','1990-2-21',12000,'13698745214','深圳',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(3,2,'大乔','女','1995-2-21',13000,'13985478512','上海',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(2,1,'小乔','女','1996-2-21',13500,'13778787874','北京',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,2,'周瑜','男','1992-10-11',8000,'13987455214','武汉',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(2,3,'鲁肃','男','1984-9-10',5500,'13254785965','成都',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(3,3,'吕蒙','男','1987-5-19',8500,'13352197364','成都',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,1,'陆逊','男','1996-5-19',7500,'13025457392','南京',getdate())
+
+insert into People(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,
+PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime)
+values(1,2,'太史慈','男','1983-6-1',7500,'13077778888','上海',getdate())
+
+
+---查询
+select * from Department
+select * from [Rank]
+select * from People 
+
+
+--1. 查询所有行所有列
+
+--2. 指定列查询（姓名，性别，月薪，电话）
+select PeopleName as 姓名 ,Peoplesex as 性别 from People;
+--3. 指定列查询,并自定义中文列名（姓名，性别，月薪，电话）
+--4. 查询公司员工所在城市（不需要重复数据）
+
+--消除重复行：distinct
+select distinct peopleAddress from People; 
+--5. 假设工资普调10%，查询原始工资和调整后的工资，显示（姓名，性别，月薪，加薪后的月薪）（添加列查询）。
+select top 3 PeopleName 姓名, PeopleSalary 月薪, PeopleSalary*1.1 加薪后月薪 from People;
+
+--top ordey by
+
+
+select * from People 
+--根据指定列（姓名，性别，月薪，电话）查询性别为女的员工信息,并自定义中文列名
+--2. 查询月薪大于等于10000 的员工信息( 单条件 )
+--3. 查询月薪大于等于10000 的女员工信息(多条件)
+select * from People where PeopleSalary>=10000 and PeopleSex='女'
+--4. 显示出生年月在1980-1-1之后，而且月薪大于等于10000的女员工信息。
+select * from People  where PeopleSalary>=10000 and PeopleSex='女' and PeopleBirth>'1995-1-1';  
+
+--5. 显示出月薪大于等于15000 的员工,或者月薪大于等于8000的女员工信息。
+select * from People where (PeopleSalary>=8000 and peoplesex='女') or PeopleSalary>=15000 
+--6. 查询月薪在10000-20000 之间员工信息( 多条件 )
+select * from People where PeopleSalary between 10000 and 20000
+--7. 查询出地址在北京或者上海的员工信息
+--8. 查询所有员工信息(根据工资排序，降序排列): asc（默认）:升序  desc:降序
+select * from People order by PeopleSalary desc
+
+--9. 显示所有的员工信息，按照名字的长度进行倒序排列
+--10. 查询工资最高的5个人的信息
+select top 5 * from People order by PeopleSalary desc
+--11. 查询工资最高的10%的员工信息
+select top 10 percent *  from People order by PeopleSalary desc
+--12. 查询出地址没有填写的员工信息
+--为空不能用=，is null, is not null
+select * from People where PeopleAddress is null;
+
+--13. 查询出地址已经填写的员工信息
+--14. 查询所有的80后员工信息
+
+--15. 查询年龄在30-40 之间，并且工资在15000-30000 之间的员工信息
+--16. 查询出巨蟹 6.22--7.22 的员工信息
+select * from people where 
+(MONTH(PeopleBirth)=6 and DAY(PeopleBirth)>=22) or  
+(MONTH(PeopleBirth)=7 and DAY(PeopleBirth)<=22)
+;
+--17. 查询工资比赵云高的人
+select * from people where PeopleSalary > 9000
+--18. 查询出和赵云在同一个城市的人
+--19. 查询出生肖为鼠的人员信息
+--20. 查询所有员工信息，添加一列显示属相(鼠,牛,虎,兔,龙,蛇,马,羊,猴,鸡,狗,猪)
+--case when end
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/SQLQuery1.sql" "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..4cace76748c61e5aaf062f6057ee9c7b89b81777
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/SQLQuery1.sql"
@@ -0,0 +1,57 @@
+USE DBTEST1;
+select * from Department;--部门表
+select * from [Rank];--职级表
+select * from People;--员工信息表
+--1. 查询出武汉地区所有的员工信息，要求显示部门名称以及员工的详细资料
+--select * from People where PeopleAddress  
+--in  
+--(select PeopleAddress  from People where PeopleAddress = '武汉')
+
+select  De.DepartmentRemark 所在部门 ,Pe.*  from People Pe 
+join Department De on De.DepartmentId = Pe.DepartmentId
+where PeopleAddress = '武汉';
+
+
+--2. 查询出武汉地区所有的员工信息，要求显示部门名称，职级名称以及员工的详细资料
+select De.DepartmentRemark 所在部门,Ra.RankRemark 职级名称,Pe.* from People Pe 
+join Department De on De.DepartmentId = Pe.DepartmentId
+join [Rank] Ra on Ra.RankId = Pe.RankId
+where PeopleAddress = '武汉';
+
+--3. 根据部门分组统计员工人数，员工工资总和，平均工资，最高工资和最低工资。
+select count(DepartmentId)员工人数,sum(PeopleSalary)员工工资总和,AVG(PeopleSalary)平均工资,max(PeopleSalary)最高工资,min(PeopleSalary)最低工资 from People
+ group by DepartmentId;
+-- select * from People;--员工信息表
+
+--4. 根据部门分组统计员工人数，员工工资总和，平均工资，最高工资和最低工资，平均工资在10000 以下的不参与统计，并且根据平均工资降序排列。
+select count(DepartmentId)员工人数,sum(PeopleSalary)员工工资总和,AVG(PeopleSalary)平均工资,max(PeopleSalary)最高工资,min(PeopleSalary)最低工资 from People
+ group by DepartmentId
+ having  Avg (PeopleSalary) >=10000
+ order by 平均工资 desc;
+ -- select * from People;--员工信息表
+
+--5. 根据部门名称，然后根据职位名称，分组统计员工人数，员工工资总和，平均工资，最高工资和最低工资
+select d.DepartmentName ,COUNT(*) 员工人数,SUM(PeopleSalary) 员工工资总和 ,AVG(PeopleSalary) 平均工资,MAX(PeopleSalary) 最高工资,MIN(PeopleSalary) 最低工资 from People p
+join Department  d on d.DepartmentId=p.DepartmentId
+group by d.DepartmentName,RankId
+
+
+--6.查询出巨蟹 6.22--7.22 的员工信息
+select * from People where PeopleAddTime between '2022-06-22' and '2022-07-22'
+update People set PeopleAddTime='2017-07-22 19:08:00' where PeopleId = 10
+--7.查询所有员工信息，添加一列显示属相(鼠,牛,虎,兔,龙,蛇,马,羊,猴,鸡,狗,猪)
+select *,case year(PeopleAddTime) % 12
+when 0 then '猴'
+when 1 then '鸡'
+when 2 then '狗'
+when 3 then '猪'
+when 4 then '鼠'
+when 5 then '牛'
+when 6 then '虎'
+when 7 then '兔'
+when 8 then '龙'
+when 9 then '蛇'
+when 10 then '马'
+when 11 then '羊'
+end '生肖'
+ from People
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232.txt" "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..6e8855c7e497d10e741b9e1c2c2976002427bb03
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232.txt"
@@ -0,0 +1,12 @@
+ 1. 闅忔満鐢熸垚鐭俊楠岃瘉鐮侊紙6浣嶆暟瀛楋級
+
+
+-- 2. 缁熻姣忎釜鐢ㄦ埛鐨勬墍鏈夊崱浣欓涔嬪拰锛屽苟鍥涜垗浜斿叆锛屼繚鐣欎竴浣嶅皬鏁�
+
+
+-- 3.鏌ヨ鐢ㄦ埛琛ㄤ腑鍚嶅瓧閮ㄥ垎涓轰腑鏂囩殑鎵�鏈夌敤鎴疯褰曪紙鍗冲繀椤诲惈鏈変腑鏂囷紝浣嗕笉鑳藉叏閮ㄦ槸涓枃锛屾瘮濡傗�樺垬澶嘺1鈥欙紝浣嗕笉鑳芥槸'鍒樺'锛�
+
+-- 4.鎵惧嚭鎵�鏈夊惈鏈夐潪娉曞瓧绗︼紙'绗ㄨ泲'锛�'鍌荤摐','姝�'锛夌殑璁板綍锛屽苟杩欎簺闈炴硶瀛楃锛屾瘮濡� '姝诲紶涓夋槸鍌荤摐' 鍙樻垚 '*寮犱笁鏄�**'锛堝嚑涓瓧绗︼紝灏辨浛鎹负鍑犱釜*锛�
+
+
+-- 5.鏌ユ壘璐﹀彿琛ㄤ腑鐩稿悓鏈堜唤寮�鎴风殑鐢ㄦ埛
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/\347\263\273\347\273\237\345\207\275\346\225\2601.sql" "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/\347\263\273\347\273\237\345\207\275\346\225\2601.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..890919b10c2a3541ecc9fdacd68f4a53a4b2fdfc
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-19\345\274\240\346\255\243\350\261\252/\347\263\273\347\273\237\345\207\275\346\225\2601.sql"
@@ -0,0 +1,54 @@
+##################鏁板�煎嚱鏁�
+
+
+SELECT CardMoney 閲戦, CEIL(CardMoney) 鍚戜笂鍙栨暣1,CEILING(CardMoney)鍚戜笂鍙栨暣2,
+FLOOR(CardMoney)鍚戜笅鍙栨暣, ROUND(CardMoney) 
+鍥涜垗浜斿叆1,ROUND(CardMoney,1) 鍥涜垗浜斿叆2 FROM `bankcard` ;
+
+
+
+## 鍙栧緱1-10涔嬮棿鐨勯殢鏈烘暟
+SELECT CEIL(RAND()*10);
+
+
+
+##################瀛楃涓插嚱鏁�
+#######  闀垮害
+#LENGTH:  瀛楄妭闀垮害(鏁板瓧锛屽瓧姣嶏紝绗﹀彿鍗犵敤涓�涓瓧鑺傦紝涓�涓眽瀛楀崰3涓瓧鑺�--utf8)
+#CHAR_LENGTH 瀛楃闀垮害
+SELECT RealName,LENGTH(RealName) 瀛楄妭闀垮害,CHAR_LENGTH(RealName) 瀛楃闀垮害1,CHARACTER_LENGTH(RealName) as 瀛楃闀垮害2 from accountinfo;
+
+
+##鎵惧嚭鍚湁涓枃鐨�
+SELECT  * from accountinfo 
+where LENGTH(RealName)  != CHAR_LENGTH(RealName) ;
+
+##鎵惧嚭鍚嶅瓧鍏ㄩ儴鏄眽瀛楃殑璁板綍
+SELECT  * from accountinfo 
+where LENGTH(RealName)  != CHAR_LENGTH(RealName) and LENGTH(RealName)%CHAR_LENGTH(RealName) =0;
+
+SELECT  * from accountinfo 
+where LENGTH(RealName)  =3* CHAR_LENGTH(RealName);
+
+
+
+
+#######  鏇挎崲 
+##INSERT(str,pos,len,newstr)  鎸囧畾浣嶇疆銆佹寚瀹氶暱搴︽浛鎹�
+##REPLACE(str,from_str,to_str) 妯＄硦鏌ユ壘鏇挎崲
+
+SELECT RealName,INSERT(RealName,2,1,'涓変赴'),REPLACE(RealName,'椋�','涓変赴')
+from accountinfo
+where AccountId=4
+;
+##鑾峰彇鏃ユ湡涓殑骞存湀
+select CardTime,INSERT(CardTime,5,-1,'') as 骞�,INSERT(INSERT(CardTime,1,5,''),3,-1,'') as 鏈� from bankcard;
+
+
+####鎴彇 LEFT(str,len) RIGHT(str,len) substr
+
+select CardTime,LEFT(CardTime,4)骞�,right(CardTime,8),SUBSTR(CardTime,6,2),SUBSTR(CardTime,6),SUBSTRing(CardTime,6,2),SUBSTRing(CardTime,6) from bankcard
+;
+
+
+
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql" "b/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..24152e6a8d29f81bf392792327702666319a80e0
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,50 @@
+use banktest;
+select * from AccountInfo;--账户信息表：存储个人信息
+select * from BankCard;--银行卡表：存储银行卡信息
+select * from CardExchange;--交易信息表（存储存钱和取钱的记录）
+select * from CardStateChange;--状态信息变化表（存储银行卡状态变化的记录，状态有1:正常,2:挂失,3:冻结,4:注销）
+select * from CardTransfer;--转账信息表（存储转账信息记录）
+--1. 关羽的银行卡号为"6225547858741263"，查询出余额比关羽多的银行卡信息，显示卡号，身份证，姓名，余额。
+select * from BankCard Bk
+join AccountInfo Ac on Bk.AccountId = Ac.AccountId
+where CardMoney > (select CardMoney from BankCard where CardNo = 6225547858741263);
+--2. 从所有账户信息中查询出余额最高的交易明细(存钱取钱信息)。
+select Bk.CardMoney 卡余额,Ca.*  from BankCard Bk
+join CardExchange Ca on Bk.CardNo = Ca.CardNo
+where CardMoney =(select Max(CardMoney) 余额最高  from BankCard);
+--3. 查询有取款记录的银行卡及账户信息，显示卡号，身份证，姓名，余额。
+select * from BankCard Ba
+join AccountInfo Ac on Ba.AccountId = Ac.AccountId
+ where CardNo not in 
+(select  case MoneyOutBank 
+when 0 then CardNo 
+end '卡号'
+ from CardExchange );
+--4. 查询出没有存款记录的银行卡及账户信息，显示卡号，身份证，姓名，余额。
+select * from BankCard Ba
+join AccountInfo Ac on Ba.AccountId = Ac.AccountId
+where CardNo  in (
+select case MoneyInBank
+when  0 then CardNo
+end '卡号'
+ from CardExchange )
+--5. 关羽的银行卡号为"6225547858741263",查询当天是否有收到转账。
+select case CardNoIn
+when 6225547858741263 then '是'
+end '是否收到转账'
+ from CardTransfer ;
+--6. 查询出交易次数（存款取款操作）最多的银行卡账户信息，显示：卡号，身份证，姓名，余额，交易次数。
+select * from BankCard Ba
+join AccountInfo Ac on Ba.AccountId = Ac.AccountId
+where CardNo  in (
+select top 1 CardNo from CardExchange 
+group by CardNo
+order by count(*) desc);
+--7.查询出没有转账交易记录的银行卡账户信息，显示卡号，身份证，姓名，余额。
+--select * from AccountInfo;--账户信息表：存储个人信息
+--select * from BankCard;--银行卡表：存储银行卡信息
+--select * from CardTransfer;--转账信息表（存储转账信息记录）
+select Bk.CardNo 卡号,Bk.CardMoney 余额,Ac.* from BankCard Bk
+join AccountInfo Ac on Bk.AccountId = Ac.AccountId 
+where CardNo not in (select CardNoOut from CardTransfer)
+ and CardNo not in (select CardNoIn from CardTransfer);
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/banktest.sql" "b/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/banktest.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..92f931695499eec94e4aad4648ca9f9df14222f1
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/banktest.sql"
@@ -0,0 +1,107 @@
+create database BankTest;
+go
+use banktest;
+go
+--账户信息表：存储个人信息
+create table AccountInfo
+(
+	AccountId int primary key identity(1,1), --账户编号
+	AccountCode varchar(20) not null, --身份证号码
+	AccountPhone varchar(20) not null, --电话号码
+	RealName varchar(20) not null, --真实姓名
+	OpenTime smalldatetime not null, --开户时间
+)
+--银行卡表：存储银行卡信息
+create table BankCard
+(
+	CardNo varchar(30) primary key, --银行卡卡号
+	AccountId int not null, --账户编号（与账户信息表形成主外键关系）
+	CardPwd varchar(30) not null, --银行卡密码
+	CardMoney money not null, --银行卡余额
+	CardState int not null,--1:正常,2:挂失,3:冻结,4:注销
+	CardTime smalldatetime default(getdate()) --开卡时间
+)
+--交易信息表（存储存钱和取钱的记录）
+create table CardExchange
+(
+	ExchangeId int primary key identity(1,1), --交易自动编号
+	CardNo varchar(30) not null, --银行卡号(与银行卡表形成主外键关系)
+	MoneyInBank money not null, --存钱金额
+	MoneyOutBank money not null, --取钱金额
+	ExchangeTime smalldatetime not null, --交易时间
+)
+--转账信息表（存储转账信息记录）
+create table CardTransfer
+(
+	TransferId int primary key identity(1,1),--转账自动编号
+	CardNoOut varchar(30) not null, --转出银行卡号(与银行卡表形成主外键关系)
+	CardNoIn varchar(30) not null, --转入银行卡号(与银行卡表形成主外键关系)
+	TransferMoney money not null,--交易金额
+	TransferTime smalldatetime not null, --交易时间
+)
+--状态信息变化表（存储银行卡状态变化的记录，状态有1:正常,2:挂失,3:冻结,4:注销）
+create table CardStateChange
+(
+	StateId int primary key identity(1,1),--状态信息自动编号
+	CardNo varchar(30) not null, --银行卡号(与银行卡表形成主外键关系)
+	OldState int not null, --银行卡原始状态
+	NewState int not null, --银行卡新状态
+	StateWhy varchar(200) not null, --状态变化原因
+	StateTime smalldatetime not null, --记录产生时间
+)
+
+
+
+--为刘备，关羽，张飞三个人进行开户开卡的操作
+--刘备身份证：420107198905064135
+--关羽身份证：420107199507104133
+--张飞身份证：420107199602034138
+insert into AccountInfo(AccountCode,AccountPhone,RealName,OpenTime)
+values('420107198905064135','13554785425','刘备',GETDATE())
+insert into BankCard(CardNo,AccountId,CardPwd,CardMoney,CardState)
+values('6225125478544587',1,'123456',0,1)
+
+insert into AccountInfo(AccountCode,AccountPhone,RealName,OpenTime)
+values('420107199507104133','13454788854','关羽',GETDATE())
+insert into BankCard(CardNo,AccountId,CardPwd,CardMoney,CardState)
+values('6225547858741263',2,'123456',0,1)
+
+insert into AccountInfo(AccountCode,AccountPhone,RealName,OpenTime)
+values('420107199602034138','13456896321','张飞',GETDATE())
+insert into BankCard(CardNo,AccountId,CardPwd,CardMoney,CardState)
+values('6225547854125656',3,'123456',0,1)
+
+select * from AccountInfo
+select * from BankCard
+
+
+
+--进行存钱操作，刘备存钱2000元，关羽存钱：8000元，张飞存钱：500000元
+select * from AccountInfo
+update BankCard set CardMoney = CardMoney + 2000 where CardNo = '6225125478544587'
+insert into CardExchange(CardNo,MoneyInBank,MoneyOutBank,ExchangeTime)
+values('6225125478544587',2000,0,GETDATE())
+
+update BankCard set CardMoney = CardMoney + 8000 where CardNo = '6225547858741263'
+
+insert into CardExchange(CardNo,MoneyInBank,MoneyOutBank,ExchangeTime)
+values('6225547858741263',8000,0,GETDATE())
+
+update BankCard set CardMoney = CardMoney + 500000 where CardNo = '6225547854125656'
+insert into CardExchange(CardNo,MoneyInBank,MoneyOutBank,ExchangeTime)
+values('6225547854125656',500000,0,GETDATE())
+
+--转账：刘备给张飞转账1000元
+update BankCard set CardMoney = CardMoney -1000 where CardNo = '6225125478544587'
+update BankCard set CardMoney = CardMoney + 1000 where CardNo = '6225547854125656'
+
+insert into CardTransfer(CardNoOut,CardNoIn,TransferMoney,TransferTime)
+values('6225125478544587','6225547854125656',1000,GETDATE())
+
+
+
+select * from AccountInfo  --个人信息
+select * from BankCard  --银行卡信息
+select * from CardStateChange  --银行卡状态更改表
+select * from CardTransfer  --转账表
+select * from CardExchange  --交易记录
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\345\255\220\346\237\245\350\257\242\347\254\224\350\256\260.txt" "b/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\345\255\220\346\237\245\350\257\242\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..a4a488b8726056ee129fa13ee97eaa1ad9a4309d
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-20\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\345\255\220\346\237\245\350\257\242\347\254\224\350\256\260.txt"
@@ -0,0 +1,7 @@
+any -- 婊¤冻鍏朵腑涓�涓潯浠�
+all  -- 婊¤冻鍏ㄩ儴鏉′欢
+case 瀛楁鍚�
+when 鏉′欢 then 缁撴灉
+end '缁撴灉瀛楁鍚嶇О' --绛変簬 java 鐨剆witch case 鐢ㄦ硶,鍔犲湪select 鍚庨潰
+top 鏁板瓧 -- 绛変簬 sql 鐨刲imit鐢ㄦ硶锛屽姞鍦╯elect 鍚庨潰
+
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-23\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql" "b/37\345\274\240\346\255\243\350\261\252/9-23\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..aa26ef324d5c30fdfe25e09a87e6cefbff4150d4
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-23\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,14 @@
+--使用STUDENTS数据库
+use STUDENTS;
+--1.创建tb_student(name)索引  填充因子设为50
+create  nonclustered index IX_name on tb_student(name)
+with(
+fillfactor = 50
+);
+--2.创建tb_record(borrow_time,return_time) 使用索引查询没还书的同学并且让没还书的同学将图书归还
+create nonclustered index IX_return on tb_record(return_time);
+select * from tb_record with (index = IX_return) where return_time is null;
+--3.增加新列id() 创建聚集索引tb_book(id)
+alter table tb_book add id int;
+create index IX_id on tb_book(id);
+drop index IX_RealName on AccountInfo
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/9-23\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt" "b/37\345\274\240\346\255\243\350\261\252/9-23\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..902741eba5307a10a9f764eadc120d7f9d76ff0e
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9-23\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
@@ -0,0 +1,9 @@
+IX_ -- 绱㈠紩鍛藉悕瑙勮寖
+nonclustered -- 闈炶仛闆嗙储寮�
+clustered -- 鑱氶泦绱㈠紩
+with(
+fillfactor = 鏁板��
+) -- 濉厖鍥犲瓙
+with (index = 绱㈠紩鍚�) --  绱㈠紩鏌ヨ
+
+
diff --git "a/37\345\274\240\346\255\243\350\261\252/9.21\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql" "b/37\345\274\240\346\255\243\350\261\252/9.21\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..6139d2eae3c1ba743bfae4dc67bbd6f2639eef4a
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9.21\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,41 @@
+use TEST04;
+select * from Student;--学生表
+select * from Course;--课程表
+select * from Teacher;--教师表
+select * from SC;--成绩表
+--13. 按平均成绩从高到低显示所有学生的所有课程的成绩以及平均成绩
+select * from SC;--成绩表
+
+select * from SC S1
+join (select [SId],AVG(score) 平均分 from SC 
+group by [SId]) S2 on S2.[SID] = S1.[SID]
+order by 平均分 desc;
+--14. 查询各科成绩最高分、最低分和平均分：
+
+--以如下形式显示：课程 ID，课程 name，最高分，最低分，平均分，及格率，中等率，优良率，优秀率
+
+--及格为>=60，中等为：70-80，优良为：80-90，优秀为：>=90
+
+--要求输出课程号和选修人数，查询结果按人数降序排列，若人数相同，按课程号升序排列
+select * from (select'01' 课程ID,'语文'课程name, max(score) 最高分,min(score)最低分,avg(score)平均分  from SC where CID = 01) S1,
+(select'02' 课程ID,'数学'课程name, max(score) 最高分,min(score)最低分,avg(score)平均分  from SC where CID = 02)S2,
+(select'03' 课程ID,'数学'课程name, max(score) 最高分,min(score)最低分,avg(score)平均分  from SC where CID = 03)S3;
+
+--15. 按各科成绩进行排序，并显示排名， Score 重复时保留名次空缺
+select S.*,Rank() over (order by score) as '排名' from
+ SC S;
+--15.1 按各科成绩进行排序，并显示排名， Score 重复时合并名次
+select S.*,dense_rank() over (order by score) as '排名' from
+ SC S;
+--16. 查询学生的总成绩，并进行排名，总分重复时保留名次空缺
+select S.*,Rank() over (order by 总分) as '排名' from
+ (select [SID],sum(score)总分 from SC group by [SID]) S;
+--16.1 查询学生的总成绩，并进行排名，总分重复时不保留名次空缺
+select * from SC;--成绩表
+
+select S.*,ROW_NUMBER() over (order by 总分) as '排名' from
+ (select [SID],sum(score)总分 from SC group by [SID]) S;
+
+--select  [SID],sum(score) 总分 from SC
+--group by [SID]
+--order by sum(score) desc;
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/9.21\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt" "b/37\345\274\240\346\255\243\350\261\252/9.21\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..ff6fe98c1de521efce1febb8d412749eb85c476e
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9.21\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
@@ -0,0 +1,6 @@
+row_number() over (partition by 瀛楁鍚� order by 瀛楁鍚� )
+-- partition by 绛変簬 group by 鐨勭敤娉曪紝row_number() 绐楀彛鍑芥暟銆愭暟鎹噸澶嶆椂缁х画鎸夐『搴忔帓銆�
+
+rank() --銆愭暟鎹噸澶嶆椂锛屾帓搴忛噸澶嶏紝涓嶄繚鐣欏悕娆＄┖缂恒��
+
+dense_rank() --銆愭暟鎹噸澶嶆椂锛屾帓搴忛噸澶嶏紝淇濈暀鍚嶆绌虹己銆�
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/9.22\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql" "b/37\345\274\240\346\255\243\350\261\252/9.22\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..11f636c2f54ea9cd6dc78963577b396e799defab
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9.22\345\274\240\346\255\243\350\261\252/\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,85 @@
+锘縰se banktest1;
+select * from AccountInfo;  --涓汉淇℃伅
+select * from BankCard;  --閾惰鍗′俊鎭�
+select * from CardStateChange;  --閾惰鍗＄姸鎬佹洿鏀硅〃
+select * from CardTransfer;  --杞处琛�
+select * from CardExchange;  --浜ゆ槗璁板綍
+--1. 涓鸿档浜戞浜鸿繘琛屽紑鎴峰紑鍗℃搷浣滐紝璧典簯韬唤璇侊細420107199904054233
+declare @name varchar(20),@id varchar(20)
+set @name = '璧典簯'
+set @id = '420107199904054233'
+insert into AccountInfo values(@id,'13554785426',@name,'2022-09-19 19:20:00')
+go
+--2. 闇�瑕佹眰鍑哄紶椋炵殑閾惰鍗″崱鍙峰拰浣欓锛屽紶椋炶韩浠借瘉锛�420107199602034138  锛�1.浣跨敤杩炴帴鏌ヨ锛�2.浣跨敤鍙橀噺锛�
+
+--#### 閫昏緫鎺у埗
+
+--##### 鏉′欢鍒嗘敮if-else
+declare @id varchar(20)
+set @id = '420107199602034138'
+select b.CardNo 鍗″彿,b.CardMoney 浣欓 from BankCard b
+inner join AccountInfo a
+on a.AccountId = b.AccountId
+where a.AccountCode = @id
+go
+--鈥�	3.鏌愮敤鎴烽摱琛屽崱鍙蜂负鈥�6225547854125656鈥濓紝璇ョ敤鎴锋墽琛屽彇閽辨搷浣滐紝鍙栭挶5000鍏冿紝浣欓鍏呰冻鍒欒繘琛屽彇閽辨搷浣滐紝骞舵彁绀�"鍙栭挶鎴愬姛"锛屽惁鍒欐彁绀衡�滀綑棰濅笉瓒斥�濄��
+
+--##### 鏉′欢鍒嗘敮:case-when
+declare @Moey int
+select @Moey = CardMoney from BankCard where CardNo='6225547854125656'
+print @Moey
+select *,case  
+when @Moey>5000 then '鍙栭挶鎴愬姛'
+else '浣欓涓嶈冻'
+end
+ from BankCard where CardNo = '6225547854125656'
+
+--鈥�	4.鏌ヨ閾惰鍗′俊鎭紝灏嗛摱琛屽崱鐘舵��1,2,3,4鍒嗗埆杞崲涓烘眽瀛椻�滄甯�,鎸傚け,鍐荤粨,娉ㄩ攢鈥濓紝骞朵笖鏍规嵁閾惰鍗′綑棰濇樉绀洪摱琛屽崱绛夌骇 30涓囦互涓嬩负鈥滄櫘閫氱敤鎴封��,30涓囧強浠ヤ笂涓�"VIP鐢ㄦ埛"锛�  
+
+----鏄剧ず鍒楀垎鍒负鍗″彿锛岃韩浠借瘉锛屽鍚嶏紝浣欓锛岀敤鎴风瓑绾э紝閾惰鍗＄姸鎬併��
+
+--##### **while**
+select t.CardNo 鍗″彿,a.AccountCode 韬唤璇�,a.RealName 濮撳悕,t.CardMoney 浣欓, 
+case 
+when t.CardMoney < 300000 then '鏅�氱敤鎴�'
+when t.CardMoney >= 300000 then 'VIP鐢ㄦ埛'
+end 鐧昏
+from AccountInfo a
+inner join
+(
+select * ,
+case
+when b.CardState = 1  then  '姝ｅ父'
+when b.CardState = 2  then  '鎸傚け'
+when b.CardState = 3  then  '鍐荤粨'
+when b.CardState = 4  then  '娉ㄩ攢'
+end 鐘舵��
+from BankCard b
+) t
+on a.AccountId = t.AccountId
+go
+
+--鈥�	5.寰幆鎵撳嵃1-10銆�
+declare @i int
+set @i = 1
+
+while (@i<=10)
+begin
+	 print @i
+	 set @i = @i +1
+end
+go
+--鈥�	6.鎵撳嵃99涔樻硶琛�
+declare @i int = 1
+while @i <= 9
+	begin
+		declare @j int = 1
+		declare @result varchar(200) = ''
+		while  @j <= @i
+			begin
+				set @result = @result + cast(@i as varchar(1))+ ' * ' + cast(@j as varchar(1)) + ' = '+ cast(@i*@j as varchar(2)) + char(9)
+				set @j = @j + 1
+			end
+		print @result
+		set @i = @i + 1
+	end
\ No newline at end of file
diff --git "a/37\345\274\240\346\255\243\350\261\252/9.22\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt" "b/37\345\274\240\346\255\243\350\261\252/9.22\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..a084603d315d9390890ddb6919b50d232852cd2f
--- /dev/null
+++ "b/37\345\274\240\346\255\243\350\261\252/9.22\345\274\240\346\255\243\350\261\252/\347\254\224\350\256\260/\347\254\224\350\256\260.txt"
@@ -0,0 +1,8 @@
+- set @鍙橀噺鍚� = 鍊�
+
+- select @鍙橀噺鍚� = 鍊�
+--渚�:
+	select @id = 1001
+	set @name = '鍛ㄩ'
+case 
+when then