查詢日期屬性
select
to_number(to_char(sysdate,'yyyymmdd')) as id,
trunc(sysdate) as fdate,--日期
to_char(sysdate,'yyyy') || '-q' || to_char(sysdate,'q') as year_quarter,--年季度
to_char(sysdate,'yyyy') || '-' || to_char(sysdate,'mm') as year_month,--年月
to_char(sysdate,'yyyy') || '-' || to_char(sysdate,'ddd') as year_day,--年天
to_char(sysdate,'yyyy-mm-dd') as year_month_day,--年月日
extract(year from sysdate) as year,--年份
to_number(to_char(sysdate,'q')) as quarter_of_year,--當年季度
extract(month from sysdate) as month_of_year,--當年月份
months_between(trunc(sysdate, 'mm'),trunc(sysdate, 'q'))+1 as month_of_quarter,--當季度月份
to_number(to_char(sysdate, 'ww')) as week_of_year,--當年周
ceil((trunc(sysdate)-trunc(sysdate, 'q')+1)/7) as week_of_quarter,--當季度周
to_number(to_char(sysdate, 'w')) as week_of_month,--當月周
to_number(to_char(sysdate,'ddd')) as day_of_year,--當年天
trunc(sysdate)-trunc(sysdate, 'q')+1 as day_of_quarter,--當季度天
extract(day from sysdate) as day_of_month,--當月天
trunc(sysdate)-trunc(sysdate,'iw')+1 as day_of_week,--當周天
to_char(sysdate, 'day') as week,--星期
case
when trunc(sysdate,'q')=trunc(sysdate, 'yyyy') then 1
else 0
end as is_f_quarter_of_year,--是否當年第一季度
case
when add_months(trunc (sysdate, 'year'), 12) - 1 = trunc(add_months(sysdate,3), 'q') -1 then 1
else 0
end as is_l_quarter_of_year,--是否當年最後一季度
case
when trunc(sysdate, 'mm')=trunc(sysdate, 'yyyy') then 1
else 0
end as is_f_month_of_year,--是否當年第一月
case
when trunc (last_day (sysdate)) = add_months(trunc (sysdate, 'year'), 12) - 1 then 1
else 0
end as is_l_month_of_year,--是否當年最後一月
case
when trunc(sysdate,'q') = trunc(sysdate, 'mm') then 1
else 0
end as is_f_month_of_quarter,--是否當季第一月
case
when trunc(add_months(sysdate,3), 'q') -1 = trunc (last_day (sysdate)) then 1
else 0
end as is_l_month_of_quarter,--是否當季最後一月
case
when trunc(sysdate)-trunc(sysdate, 'yyyy') < 7 then 1
else 0
end as is_f_week_of_year,--是否當年第一周
case
when to_number(to_char(sysdate,'ddd'))-52*7 > 0 then 1
else 0
end as is_l_week_of_year,--是否當年最後一周
case
when trunc(sysdate) - trunc(sysdate,'q') < 7 then 1
else 0
end as is_f_week_of_quarter,--是否當季第一周
case
when ceil((trunc(sysdate) - trunc(sysdate, 'q') +1)/7) = ceil(((trunc(add_months(sysdate,3), 'q') -1) - trunc(sysdate, 'q') + 1)/7) then 1
else 0
end as is_l_week_of_quarter,--是否當季最後一周
case
when trunc(sysdate) - trunc(sysdate, 'mm') < 7 then 1
else 0
end as is_f_week_of_month,--是否當月第一周
case
when ceil((trunc(sysdate) - trunc(sysdate, 'mm') + 1)/7) = ceil((trunc(last_day (sysdate)) - trunc(sysdate, 'mm') + 1)/7) then 1
else 0
end as is_l_week_of_month,--是否當月最後一周
case
when trunc(sysdate) = trunc(sysdate, 'yyyy') then 1
else 0
end as is_f_day_of_year,--是否當年第一天
case
when trunc(sysdate) = (add_months (trunc (sysdate, 'year'), 12) - 1) then 1
else 0
end as is_l_day_of_year,--是否當年最後一天
case
when trunc(sysdate) = trunc(sysdate, 'q') then 1
else 0
end as is_f_day_of_quarter,--是否當季第一天
case
when trunc(sysdate) = (trunc(add_months(sysdate,3), 'q') -1) then 1
else 0
end as is_l_day_of_quarter,--是否當季最後一天
case
when trunc(sysdate) = trunc(sysdate, 'mm') then 1
else 0
end as is_f_day_of_month,--是否當月第一天
case
when trunc(sysdate) = trunc (last_day (sysdate)) then 1
else 0
end as is_l_day_of_month,--是否當月最後一天
case
when trunc(sysdate) = trunc(sysdate,'iw') then 1
else 0
end as is_f_day_of_week,--是否當周第一天
case
when trunc(sysdate) = (trunc(sysdate,'iw')+6) then 1
else 0
end as is_l_day_of_week,--是否當周最後一天
case
when mod(extract(year from sysdate),4) = 0 then 1
else 0
end as is_leap--是否閏年
from dual;
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