我使用以下查询来找出一个月中不包括周末的工作日数
select payroll_id as payrollId,
(select count(*)
from ( select rownum rnum
from all_objects
where rownum <= to_date(to_char(last_day(to_date('01-'||'MAY'||'2017','DD-MM-YYYY')),'DD')||'MAY'||'2017','DD-MM-YYYY') - to_date('01-'||'MAY'||'2017','DD-MM-YYYY')+1 )
where to_char( to_date('01-'||'MAY'||'2017','DD-MM-YYYY')+rnum-1, 'DY' )
not in ( 'SAT', 'SUN' )) - (select count(*) from admin_holiday where to_char(holiday_date,'DD-MON-YYYY') like '%-MAY-2017%' and holiday_type_id=1) days
from employee where DEL_FLAG=1 order by payrollId
在这里,payrollId 是员工表中employee_id,admin_holiday是一个包含有关一个月中国定假日信息的表
我的要求是,如果月份是当月,那么工作日应该是今天的日期。例如,当前月份是MAY/2017,直到今天(即22/05/2017(,不包括周末的工作日为15(根据印度教日历,10/05/2017是国定假日。
如何获得所需的结果。
注意,此操作必须在单个选择语句中执行,并且不能执行其他 pl/sql 块等。
以下是我如何处理等效查询的方法。通过将日期范围计算放入小型交叉联接查询中,您可以在查询的其余部分轻松访问结果。
SELECT
e.payroll_id AS payrollId
, cj. working_days
FROM employee e
cross join (
select
GREATEST(NEXT_DAY(start_date, 'MON') - start_date - 2, 0)
+ ((NEXT_DAY(end_date, 'MON') - NEXT_DAY(start_date, 'MON'))/7)*5
- GREATEST(NEXT_DAY(end_date, 'MON') - end_date - 3, 0)
- (
SELECT COUNT(holiday)
FROM admin_holiday
WHERE holiday_date BETWEEN start_date AND end_date
)
as working_days
FROM (
select
to_date('20170501','yyyymmdd') as start_date
, to_date('20170522','yyyymmdd') as end_date
from dual
)
) cj
WHERE e.DEL_FLAG = 1
ORDER BY e.payrollId
工作日的逻辑是:
计算第一周的前导天数 +(计算周一/周五期间的数量(* 5 - 最后一周的过去天数 - 表中的额外假期:
select
GREATEST(NEXT_DAY(start_date, 'MON') - start_date - 2, 0)
+ ((NEXT_DAY(end_date, 'MON') - NEXT_DAY(start_date, 'MON'))/7)*5
- GREATEST(NEXT_DAY(end_date, 'MON') - end_date - 3, 0)
- (
SELECT COUNT(holiday)
FROM admin_holiday
WHERE holiday_date BETWEEN start_date AND end_date
)
as working_days
, start_date
, end_date
, holidays
, end_date - start_date
FROM (
select
trunc(sysdate,'MM') as start_date
, trunc(sysdate) as end_date
from dual
)
示例(这里没有零假期(:
+--------------+--------------+-------------+------------+-------------------------+
| WORKING_DAYS | START_DATE | END_DATE | HOLIDAYS | END_DATE-START_DATE |
+--------------+--------------+-------------+------------+-------------------------+
| 16 | 01.05.2017 | 22.05.2017 | 0 | 21 |
+--------------+--------------+-------------+------------+-------------------------+
要手动设置日期,您可以执行以下操作:
select
GREATEST(NEXT_DAY(start_date, 'MON') - start_date - 2, 0)
+ ((NEXT_DAY(end_date, 'MON') - NEXT_DAY(start_date, 'MON'))/7)*5
- GREATEST(NEXT_DAY(end_date, 'MON') - end_date - 3, 0)
- (
SELECT COUNT(holiday)
FROM admin_holiday
WHERE holiday_date BETWEEN start_date AND end_date
)
as working_days
FROM (
select
to_date('20170501','yyyymmdd') as start_date
, to_date('20170522','yyyymmdd') as end_date
from dual
)