diff --git a/SQL_SERVER/.vs/Solution1/v15/.ssms_suo b/SQL_SERVER/.vs/Solution1/v15/.ssms_suo
new file mode 100644
index 0000000..83817f8
Binary files /dev/null and b/SQL_SERVER/.vs/Solution1/v15/.ssms_suo differ
diff --git a/SQL_SERVER/Chat.sql b/SQL_SERVER/Chat.sql
new file mode 100644
index 0000000..8c4389c
--- /dev/null
+++ b/SQL_SERVER/Chat.sql
@@ -0,0 +1,102 @@
+CREATE LOGIN Chat
+    WITH PASSWORD = '123456';
+GO
+
+DROP DATABASE Chat;
+GO
+
+CREATE DATABASE Chat;
+GO
+
+USE Chat;
+GO
+
+CREATE USER Chat
+    FOR LOGIN Chat;
+GO
+
+ALTER ROLE db_owner ADD MEMBER Chat;
+GO
+
+CREATE TABLE Account
+(
+    Id BIGINT PRIMARY KEY IDENTITY(1000,1),
+    Password VARCHAR(50) not null,
+    NetName NVARCHAR(50) ,
+    State BIT default 0 CHECK(State=1 or State=0),
+    UpDataTime datetime default GETDATE()
+)
+GO
+
+CREATE TABLE Contacts
+(
+    UserId BIGINT REFERENCES Account(Id) not null ,
+    ContactsId BIGINT REFERENCES Account(Id) not null,
+    State BIT default 0 CHECK(State=1 or State=0),
+    Remark NVARCHAR(50),
+    UpDataTime datetime default GETDATE()
+)
+GO
+
+CREATE TABLE History
+(
+    Send BIGINT REFERENCES Account(Id) NOT NULL,
+    Receive BIGINT REFERENCES Account(Id) NOT NULL,
+    Type NVARCHAR(50) NOT NULL,
+    Content NVARCHAR(200) NOT NULL,
+    Time DATETIME DEFAULT GETDATE()
+)
+
+GO
+
+-- Account表的更新触发器
+CREATE TRIGGER trg_UpdateUpDataTimeAccount
+ON Account
+AFTER INSERT, UPDATE, DELETE
+AS
+BEGIN
+    SET NOCOUNT ON;
+    UPDATE Account
+    SET UpDataTime = GETDATE()
+    WHERE Id IN (SELECT Id FROM inserted UNION SELECT Id FROM deleted);
+END;
+GO
+
+
+-- Contacts表的更新触发器
+CREATE TRIGGER trg_UpdateUpDataTimeContacts
+ON Contacts
+AFTER INSERT, UPDATE
+AS
+BEGIN
+    SET NOCOUNT ON;
+
+    -- 更新Account表中的UpDataTime字段，仅在Contacts相关记录发生插入或更新时
+    UPDATE Account
+    SET UpDataTime = GETDATE()
+    WHERE Id IN (SELECT UserId FROM inserted)
+       OR Id IN (SELECT ContactsId FROM inserted);
+
+    -- 更新Contacts表的Remark列为对应ContactsId的NetName
+    UPDATE Contacts
+    SET Remark = (SELECT NetName FROM Account WHERE Id = ContactsId)
+    WHERE ContactsId IN (SELECT ContactsId FROM inserted)
+       OR ContactsId IN (SELECT ContactsId FROM deleted);
+END;
+GO
+
+-- History表的更新触发器
+CREATE TRIGGER trg_UpdateUpDataTimeHistory
+ON History
+AFTER INSERT, UPDATE
+AS
+BEGIN
+    SET NOCOUNT ON;
+
+    -- 仅更新Account表中发送者和接收者的UpDataTime字段
+    UPDATE Account
+    SET UpDataTime = GETDATE()
+    WHERE Id IN (SELECT Send FROM inserted)
+       OR Id IN (SELECT Receive FROM inserted);
+END;
+GO
diff --git a/SQL_SERVER/bank.sql b/SQL_SERVER/bank.sql
new file mode 100644
index 0000000..4d8c9fa
--- /dev/null
+++ b/SQL_SERVER/bank.sql
@@ -0,0 +1,42 @@
+CREATE DATABASE BANKSYSTEM;
+
+USE BANKSYSTEM;
+
+CREATE TABLE AccountInfo
+(
+    AccountId INT PRIMARY KEY IDENTITY (1,1),
+    NetName   NVARCHAR(50)       NOT NULL,
+    Password  NVARCHAR(50)       NOT NULL,
+    Name      NVARCHAR(5)        NOT NULL,
+    IdCard    VARCHAR(18) UNIQUE NOT NULL,
+    OpenTime  datetime default getdate()
+)
+
+CREATE TABLE State
+(
+    StateId INT PRIMARY KEY,
+    Name    VARCHAR(50) unique not null
+)
+
+
+CREATE TABLE BankCard
+(
+    Id        VARCHAR(18) PRIMARY KEY,
+    Password  VARCHAR(6) NOT NULL,
+    Money     money                          default 0 check (Money >= 0),
+    OpenTime  smalldatetime                  default getdate(),
+    AccountId INT REFERENCES AccountInfo (AccountId),
+    StateId   INT REFERENCES State (StateId) DEFAULT 1,
+    WhyState  NVARCHAR(50)
+)
+
+CREATE TABLE Bill
+(
+    Id     INT PRIMARY KEY IDENTITY (1,1),
+    BankId VARCHAR(18) REFERENCES BankCard (Id) NOT NULL,
+    Money  money    default 0,
+    Source VARCHAR(50)                              NOT NULL,
+    Mod    VARCHAR(10)                              NOT NULL CHECK (Mod = 'Input' OR Mod = 'Output'),
+    State  VARCHAR(10)                              NOT NULL CHECK (State = 'True' or State = 'False'),
+    Time   datetime default getdate()
+)