Question

有两个问题我正在获取一个给出今天缺席余额的查询另一个会给昨天的缺席余额

今天的净权利：

query 1 :


select e.emp_no,
a.absence_code,
a.net_entitlement
from emp_details e,
absence_tab_history a
where a.person_id=e.person_id
and a.history_date=trunc(sysdate);

昨天的净权利：

query 2 :

select e.emp_no,
a.absence_code,
a.net_entitlement
from emp_details e,
absence_tab_history a
where a.person_id=e.person_id
and a.history_date=trunc(sysdate)-1;

现在查询1将获取今日净权利的列，例如

emp no. Absence code        net entitlement

1        Sick Leave             9
2        Privilege Leave        5
3        Sick Leave             5

现在，查询2将获取昨天的员工净收入列

emp no. Absence code        net entitlement

1        Sick Leave             10
2        Privilege Leave        5
3        Sick Leave             6

这意味着没有。 1和2的净权利已经改变，他们两人每人休假1次。现在我想创建一个捕获相同的查询。只有emp 1和2 也就是说，如果净权利已更改，则仅显示已更改的行。减号不适用于此并且花费太多时间来执行。请帮助

Answer 1

    with present_day 
as
(
select 1 as emp_id,'Sick Leave' as code , 9 as net_entitlement from dual
union
select 2 as emp_id,'Privilege Leave' as code , 5 as net_entitlement from dual
union
select 3 as emp_id,'Sick Leave' as code , 5 as net_entitlement from dual
),
yester_day
as
(
select 1 as emp_id,'Sick Leave' as code , 10 as net_entitlement from dual
union
select 2 as emp_id,'Privilege Leave' as code , 5 as net_entitlement from dual
union
select 3 as emp_id,'Sick Leave' as code , 6 as net_entitlement from dual
)

select a.emp_id,a.code,a.net_entitlement,decode(a.net_entitlement-b.net_entitlement,0,'UNCHG','CHNG')
from present_day a,yester_day b
where a.emp_id=b.emp_id and a.code=b.code
and decode(a.net_entitlement-b.net_entitlement,0,'UNCHG','CHNG')='CHNG'

尝试以上代码并告诉我

Answer 2

您需要将数据放在表格中以进行比较。这是一种方法：

select e.emp_no, coalesce(a.absence_code, ath.absence_code) as absence_code,
       a.net_entitlement, ath.net_entitlement
from emp_details e left join
     absence_tab_history ath
     on ath.person_id = e.person_id and
        ath.history_date = trunc(sysdate) - 1 left join
     absence_tab a
     on a.person_id = e.person_id
where a.person_id is null or
      ath.person_id is null or
      ath.net_entitlement <> a.net_entitlement;

where条款中的前两个条件适用于出现的新员工以及离职的前员工。

计算两天之间的休假净额权利差异

2 个答案: