. 定义存储过程，功能是往销售表中插入一行数据，参数为：销售单号、油品编号、油库编号、工作人员编号、销售数量和会员编号。其他属性设置如下：时间为当前时间，折扣通过会员编号从会员信息表中查询得到，单价从油品类别中得到。 2. 定义存储过程，参数为年份，统计各个油库此年的利润。 3. 在存储过程中定义游标，输出每个客户的编号，姓名，等级，消费额。 4. 员工的奖金与其销售额有关，请定义函数，参数为工作号和年月，返回值为该员工此年此月的销售额。 5. 请定义函数，参数为油品编号，返回值为该油品今年的销量。

好的，我会根据您的要求回答您的问题。下面是每个问题的答案：

1. 存储过程的定义如下：

CREATE PROCEDURE insert_sales
  @sales_number INT,
  @oil_number INT,
  @oil_depot_number INT,
  @worker_number INT,
  @sales_quantity INT,
  @member_number INT
AS
BEGIN
  DECLARE @discount DECIMAL(5,2), @unit_price DECIMAL(5,2)
  SELECT @discount = discount, @unit_price = price
  FROM member_information mi
  JOIN oil_category oc ON mi.member_number = @member_number AND oc.oil_number = @oil_number
  
  INSERT INTO sales (sales_number, oil_number, oil_depot_number, worker_number, sales_quantity, sales_time, discount, unit_price)
  VALUES (@sales_number, @oil_number, @oil_depot_number, @worker_number, @sales_quantity, GETDATE(), @discount, @unit_price)
END

2. 存储过程的定义如下：

CREATE PROCEDURE calculate_profit_by_year
  @year INT
AS
BEGIN
  SELECT oil_depot_number, SUM(sales_quantity * (unit_price - cost_price)) AS profit
  FROM sales s
  JOIN oil_category oc ON s.oil_number = oc.oil_number
  WHERE YEAR(sales_time) = @year
  GROUP BY oil_depot_number
END

3. 存储过程的定义如下：

CREATE PROCEDURE output_customer_info
AS
BEGIN
  DECLARE @customer_number INT, @customer_name VARCHAR(50), @customer_level VARCHAR(20), @total_sales DECIMAL(10,2)
  
  DECLARE customer_cursor CURSOR FOR
  SELECT customer_number, customer_name, customer_level
  FROM customer_information
  
  OPEN customer_cursor
  
  FETCH NEXT FROM customer_cursor INTO @customer_number, @customer_name, @customer_level
  
  WHILE @@FETCH_STATUS = 0
  BEGIN
    SELECT @total_sales = SUM(sales_quantity * unit_price)
    FROM sales s
    JOIN customer_information ci ON s.customer_number = ci.customer_number AND s.customer_number = @customer_number
    
    PRINT 'Customer Number: ' + CAST(@customer_number AS VARCHAR(10)) + ', Customer Name: ' + @customer_name + ', Customer Level: ' + @customer_level + ', Total Sales: ' + CAST(@total_sales AS VARCHAR(20))
    
    FETCH NEXT FROM customer_cursor INTO @customer_number, @customer_name, @customer_level
  END
  
  CLOSE customer_cursor
  DEALLOCATE customer_cursor
END

4. 函数的定义如下：

CREATE FUNCTION get_employee_sales
  (@worker_number INT, @year INT, @month INT)
RETURNS DECIMAL(10,2)
AS
BEGIN
  DECLARE @total_sales DECIMAL(10,2)
  
  SELECT @total_sales = SUM(sales_quantity * unit_price)
  FROM sales s
  JOIN employee_information ei ON s.worker_number = ei.worker_number AND s.worker_number = @worker_number
  WHERE YEAR(sales_time) = @year AND MONTH(sales_time) = @month
  
  RETURN @total_sales
END

5. 函数的定义如下：

CREATE FUNCTION get_oil_sales_by_year
  (@oil_number INT, @year INT)
RETURNS INT
AS
BEGIN
  DECLARE @total_sales INT
  
  SELECT @total_sales = SUM(sales_quantity)
  FROM sales s
  WHERE s.oil_number = @oil_number AND YEAR(sales_time) = @year
  
  RETURN @total_sales
END