创建名为“Update_EMP_Sal”的存储过程，以员工号和修改后的工资为参数，保证修改后的工资在职位允许的工资范围之内，并且与原工资的差值在10%范围内，否则取消操作，并说明原因

创建名为"Update_EMP_Sal"的存储过程，通常涉及SQL语言，其伪代码可能如下：

CREATE PROCEDURE Update_EMP_Sal (@EmployeeID INT, @NewSalary DECIMAL(10, 2))
AS
BEGIN
    DECLARE @CurrentSal DECIMAL(10, 2);
    DECLARE @PositionMaxSalary DECIMAL(10, 2);
    DECLARE @DifferenceRatio DECIMAL;

    -- 查询当前工资
    SELECT @CurrentSal = Salary INTO @CurrentSal FROM Employees WHERE EmployeeID = @EmployeeID;

    -- 获取员工职位的最大允许工资
    SELECT @PositionMaxSalary = PositionMaxSalary INTO @PositionMaxSalary FROM JobTitles WHERE TitleID IN (SELECT TitleID FROM Employees WHERE EmployeeID = @EmployeeID);

    -- 计算新旧工资差异比例
    SET @DifferenceRatio = ABS(@NewSalary - @CurrentSal) / @CurrentSal;

    IF @NewSalary BETWEEN @CurrentSal AND @PositionMaxSalary AND @DifferenceRatio <= 0.1
    BEGIN
        -- 更新员工工资
        UPDATE Employees SET Salary = @NewSalary WHERE EmployeeID = @EmployeeID;
        SELECT '成功更新员工工资' AS Result;
    END
    ELSE
    BEGIN
        -- 取消操作并给出原因
        SELECT '新工资超出职位允许范围或与原工资的差值超过10%，操作已取消';
    END
END;