帮我用sql语句完成一下操作：创建一个存储过程，要求一个员工的工作年份大于6年时将其转到经理办公室工作。 创建一个存储过程，根据每个人的学历将收入提高，如大专及以下提高400，本科提高500，硕士提高650，博士提高800。 创建一个存储过程，使用游标计算本科及以上学历的员工在总员工中所占比例。 创建存储过程，使用游标确定一个员工的实际收入是否排在前三名，结果为1表示是，结果为0表示否。 用触发器实现数据库YGGL中的参照完整性 删除Department表中记录的同时删除该记录“DepartmentID”字段值在Employees表中对应的记录。 创建UPDATE触发器，当Salary 表中Income值增加500时， OutCome 值则增加50。 创建触发器，当修改Employees表中员工的工作时间增加1年则将收入增加500，增加2年则增加1000，依次增加。若工作时间减少则无变化。 对于“YGGL”数据库，表Employees的EmployeeID列与表Salary的 EmployeeID列应满足参照完整性，请用触发器实现之。

1. 创建一个存储过程，要求一个员工的工作年份大于6年时将其转到经理办公室工作。

CREATE PROCEDURE transfer_to_manager_office
    @employee_id INT
AS
BEGIN
    IF (SELECT DATEDIFF(YEAR, HireDate, GETDATE()) FROM Employees WHERE EmployeeID = @employee_id) > 6
    BEGIN
        UPDATE Employees SET Office = 'Manager Office' WHERE EmployeeID = @employee_id
    END
END

2. 创建一个存储过程，根据每个人的学历将收入提高，如大专及以下提高400，本科提高500，硕士提高650，博士提高800。

CREATE PROCEDURE increase_salary_by_education_level
AS
BEGIN
    UPDATE Salary SET Income = 
    CASE Education
        WHEN '大专及以下' THEN Income + 400
        WHEN '本科' THEN Income + 500
        WHEN '硕士' THEN Income + 650
        WHEN '博士' THEN Income + 800
        ELSE Income
    END
END

3. 创建一个存储过程，使用游标计算本科及以上学历的员工在总员工中所占比例。

CREATE PROCEDURE calculate_percentage_of_bachelor_or_above
AS
BEGIN
    DECLARE @total INT, @count INT, @percentage DECIMAL(5,2)
    SELECT @total = COUNT(*) FROM Employees
    SELECT @count = COUNT(*) FROM Employees WHERE Education IN ('本科','硕士','博士')
    SET @percentage = CONVERT(DECIMAL(5,2), @count) / CONVERT(DECIMAL(5,2), @total) * 100
    PRINT 'Percentage of employees with Bachelor or above degree: ' + CONVERT(VARCHAR(10), @percentage) + '%'
END

4. 创建存储过程，使用游标确定一个员工的实际收入是否排在前三名，结果为1表示是，结果为0表示否。

CREATE PROCEDURE check_if_income_ranked_top_three
    @employee_id INT
AS
BEGIN
    DECLARE @income INT, @rank INT
    SELECT @income = Income FROM Salary WHERE EmployeeID = @employee_id
    DECLARE cur CURSOR FOR
    SELECT Income FROM Salary ORDER BY Income DESC
    SET @rank = 1
    OPEN cur
    FETCH NEXT FROM cur INTO @income
    WHILE @@FETCH_STATUS = 0
    BEGIN
        IF (@income = (SELECT Income FROM Salary WHERE EmployeeID = @employee_id))
        BEGIN
            IF (@rank <= 3) PRINT '1'
            ELSE PRINT '0'
            BREAK
        END
        SET @rank = @rank + 1
        FETCH NEXT FROM cur INTO @income
    END
    CLOSE cur
    DEALLOCATE cur
END

5. 用触发器实现数据库YGGL中的参照完整性 删除Department表中记录的同时删除该记录“DepartmentID”字段值在Employees表中对应的记录。

CREATE TRIGGER trg_delete_department
ON Department
AFTER DELETE
AS
BEGIN
    DELETE FROM Employees WHERE DepartmentID IN (SELECT DepartmentID FROM DELETED)
END

6. 创建UPDATE触发器，当Salary 表中Income值增加500时， OutCome 值则增加50。

CREATE TRIGGER trg_salary_increase
ON Salary
AFTER UPDATE
AS
BEGIN
    IF UPDATE(Income)
    BEGIN
        UPDATE Salary SET Outcome = Outcome + 50 WHERE Income IN (SELECT Income + 500 FROM INSERTED)
    END
END

7. 创建触发器，当修改Employees表中员工的工作时间增加1年则将收入增加500，增加2年则增加1000，依次增加。若工作时间减少则无变化。

CREATE TRIGGER trg_increase_salary_by_work_years
ON Employees
AFTER UPDATE
AS
BEGIN
    IF UPDATE(HireDate)
    BEGIN
        DECLARE @employee_id INT, @hire_date DATE, @years_diff INT
        DECLARE cur CURSOR FOR
        SELECT EmployeeID, HireDate FROM INSERTED
        OPEN cur
        FETCH NEXT FROM cur INTO @employee_id, @hire_date
        WHILE @@FETCH_STATUS = 0
        BEGIN
            SET @years_diff = DATEDIFF(YEAR, @hire_date, GETDATE())
            IF (@years_diff > 0)
            BEGIN
                UPDATE Salary SET Income = 
                CASE 
                    WHEN @years_diff = 1 THEN Income + 500
                    WHEN @years_diff = 2 THEN Income + 1000
                    ELSE Income
                END
                WHERE EmployeeID = @employee_id
            END
            FETCH NEXT FROM cur INTO @employee_id, @hire_date
        END
        CLOSE cur
        DEALLOCATE cur
    END
END

8. 对于“YGGL”数据库，表Employees的EmployeeID列与表Salary的 EmployeeID列应满足参照完整性，请用触发器实现之。

CREATE TRIGGER trg_ensure_referential_integrity
ON Employees
AFTER INSERT, UPDATE
AS
BEGIN
    IF EXISTS (SELECT * FROM INSERTED WHERE EmployeeID NOT IN (SELECT EmployeeID FROM Salary))
    BEGIN
        RAISERROR('EmployeeID does not exist in Salary table.', 16, 1)
        ROLLBACK TRANSACTION
    END
END