写出上述三张表的，添加sql语句

创建数据库表通常涉及到SQL的CREATE TABLE语句。然而，您并没有提供具体的表结构信息。假设您有三个表，分别是`Employees`（员工），`Departments`（部门）和`EmployeeDepartments`（员工部门关联表），我可以给出示例：

1. `Employees`表：

CREATE TABLE Employees (
    EmployeeID INT PRIMARY KEY,
    FirstName VARCHAR(50),
    LastName VARCHAR(50),
    Email VARCHAR(100)
);

2. `Departments`表：

CREATE TABLE Departments (
    DepartmentID INT PRIMARY KEY,
    DepartmentName VARCHAR(100),
    ManagerID INT FOREIGN KEY REFERENCES Employees(EmployeeID)
);

3. `EmployeeDepartments`表（如果是一个独立的关联表，用于存储员工与部门之间的关系，通过外键链接两个表）：

CREATE TABLE EmployeeDepartments (
    EmployeeID INT,
    DepartmentID INT,
    FOREIGN KEY (EmployeeID) REFERENCES Employees(EmployeeID),
    FOREIGN KEY (DepartmentID) REFERENCES Departments(DepartmentID)
);

如果您需要向这些表添加数据，可以使用INSERT INTO语句。例如，插入员工信息：

INSERT INTO Employees (EmployeeID, FirstName, LastName, Email)
VALUES (1, '张三', '李四', 'zhangsan@example.com');