如何在oracle sql中连接具有不同记录数和列数的两个查询？

我有三张桌子：

Employee_leave(EmployeeID,Time_Period,leave_type)  
Employee(EID,Department,Designation) 
 leave_eligibility(Department,Designation, LeaveType, LeavesBalance). 

我想获取每个LeaveTypes（类别）中特定员工可用的假期数，因此我编写了以下查询Query1

    SELECT LEAVE_TYPE, SUM(TIME_PERIOD) 
    FROM EMPLOYEE_LEAVE 
    WHERE EMPLOYEEID=78 
    GROUP BY LEAVE_TYPE 
    order by leave_type;

查询1的输出

Leave_Type     |    SUM(Time_Period)
Casual                         1
Paid                           4
Sick                           1

我想获取员工符合每种休假类型（类别）的休假次数。下面的查询查询2给出了所需的结果

    Select UNIQUE Leavetype,LEAVEBALANCE 
    from LEAVE_ELIGIBILITY 
          INNER JOIN EMPLOYEE 
              ON LEAVE_ELIGIBILITY.DEPARTMENT= EMPLOYEE.DEPARTMENT 
                 AND LEAVE_ELIGIBILITY.DESIGNATION= EMPLOYEE.DESIGNATION 
     WHERE EID=78
     order by leavetype;

查询2的输出

LeaveType     |    LeaveBalance
Casual                   10
Paid                     15           
Privlage                  6             
Sick                     20

现在我想加入这两个查询Query1和Query2，或者创建一个视图来显示这两个查询中的记录。从输出中还可以看到，不同查询的记录数不同对于查询1的输出中不存在的记录，它应该在最终输出中显示0。就像在本例中，查询1的输出中没有类似privlage的记录，但它应该在最终输出privlage的Sum（time_period）中显示0。我尝试创建这两个查询的视图，然后合并它们，但无法运行最终查询

视图1的代码

create or replace view combo_table1 as 
   Select UNIQUE Leavetype,LEAVEBALANCE,EMPLOYEE.DEPARTMENT,EMPLOYEE.DESIGNATION, EID 
  from LEAVE_ELIGIBILITY 
       INNER JOIN EMPLOYEE 
       ON LEAVE_ELIGIBILITY.DEPARTMENT= EMPLOYEE.DEPARTMENT
       AND LEAVE_ELIGIBILITY.DESIGNATION= EMPLOYEE.DESIGNATION 
        WHERE EID='78'; 

视图2的代码

create or replace view combo_table2 as
    SELECT LEAVE_TYPE, SUM(TIME_PERIOD) AS Leave_Availed 
    FROM EMPLOYEE_LEAVE
    WHERE EMPLOYEEID='78'
    GROUP BY LEAVE_TYPE;

连接2个视图的代码

SELECT combo_table1.Leavetype, combo_table1.LEAVEBALANCE, combo_table2.leave_availed 
FROM combo_table1 v1 
INNER JOIN combo_table2 v2 
ON v1.Leavetype = v2.LEAVE_TYPE;

但我在执行上述查询时得到“%s:无效标识符”。另外，我知道我不能使用union，因为它需要相同的列，而这里不是

我正在使用Oracle 11g，因此请相应地回答。

提前谢谢

期望的最终输出

LeaveType  |  LeaveBalance   |   Sum(Time_period)
Casual               10                  1
Paid                 15                  4        
Privlage              6                  0
Sick                 20                  1

试试这个例子：

with t as (
    select 'Casual' as Leave_Type, 1 as Time_Period, 0 as LeaveBalance from dual
    union all
    select 'Paid', 4,0 from dual
    union all
    select 'Sick', 1,0 from dual),
t1 as (
    select 'Casual' as Leave_Type, 0 as Time_Period, 10 as LeaveBalance from dual
    union all
    select 'Paid', 0, 15 from dual
    union all
    select 'Privlage', 0, 6 from dual
    union all
    select 'Sick', 0, 20 from dual)

select Leave_Type, sum(Time_Period), sum(LeaveBalance) 
from(
    select *
    from t
    UNION ALL
    select * from t1
) 
group by Leave_Type 

好的，编辑：

create or replace view combo_table1 as 
Select UNIQUE Leavetype, 0 AS Leave_Availed, LEAVEBALANCE 
from LEAVE_ELIGIBILITY INNER JOIN EMPLOYEE ON LEAVE_ELIGIBILITY.DEPARTMENT= EMPLOYEE.DEPARTMENT AND LEAVE_ELIGIBILITY.DESIGNATION= EMPLOYEE.DESIGNATION 
WHERE EID='78';

create or replace view combo_table2 as 
SELECT LEAVE_TYPE as Leavetype, SUM(TIME_PERIOD) AS Leave_Availed, 0 as LEAVEBALANCE 
FROM EMPLOYEE_LEAVE 
WHERE EMPLOYEEID='78'
GROUP BY LEAVE_TYPE, LEAVEBALANCE;

SELECT Leavetype, sum(LEAVEBALANCE), sum(leave_availed)
FROM (
  select *
    from combo_table1
    UNION ALL
    select * from combo_table2
)
group by Leavetype;

---

要获得最终所需的输出

对于查询1的输出中不存在的记录，它应在最终输出中显示0

。。。使用外部联接将休假记录绑定到其他表。对于员工未休的假期类型，这将为零

时间\持续时间

select emp.Employee_ID
       , le.leavetype
       , le.leavebalance 
       , sum (el.Time_Duration) as total_Time_Duration
from employee emp
     inner join leave_eligibility le
          on le.department= emp.department 
             and le.designation= emp.designation 
     left outer join Employee_leave el
           on el.EmployeeID = emp.Employee_ID
           and el.leave_type = le.leavetype        
group by emp.Employee_ID
       , le.leavetype
       , le.leavebalance 
       ;

你眼前的问题是：

我正在获取“%s:无效标识符”

您的视图引用了列

EID

，尽管您发布的表中没有该名称的列。同样地，

Time\u Duration

和

Time\u period

之间也存在混淆

---

更一般地说，如果您在公共列中使用完全相同的名称，您会发现生活会变得更加轻松（即始终使用

employee\u id

或

employeeid

，不要删改）

我不希望在最终输出中使用静态值。这些值应该来自2个查询的输出。