我有employees表,我试图只查询时间戳范围内可用的雇员。
select
emp_fn_name, emp_fn_name,
TO_TIMESTAMP(e.start_time, 'HH12:MIAM,PM')::TIME,
TO_TIMESTAMP(e.end_time, 'HH12:MIAM,PM')::TIME
from
employees e
inner join
schedule s on emp_id = e.id
where
TO_TIMESTAMP(s.start_time, 'HH12:MIAM,PM')::TIME
not BETWEEN TO_TIMESTAMP('2:00PM', 'HH12:MIAM,PM')::TIME
AND TO_TIMESTAMP('03:00PM', 'HH12:MIAM,PM')::TIME
明细表的示例数据:
start end days emp_id emp_fn
2:00 3:00PM TuTh 38 e1
2:00 3:00PM TuTh 154 e2
4:00 5:00AM TuTh 154 e3
6:00 7:00AM MW 154 e1
7:00 8:00AM MW 154 e4
如果我要找人在下午2:00到3:00之间为图思工作,我应该得到emp3和emp4,因为他们在指定的时间范围内不忙。
谢谢您。
最佳答案
我想你想要:
select emp_fn_name, emp_fn_name
from employees e
where not exists (select 1
from schedule s
where s.emp_id = e.id and
s.start < '03:00PM'::time and
s.end > '02:00PM'::time
);