計算每週第一天和最後一天

計算每週第一天和最後一天

select

day,dayofweek(
day)
as dw1
,date_add(
day,
1- dayofweek(
day)
)as su_s -- 週日_start
,date_add(
day,
7- dayofweek(
day)
)as sa_e -- 週六_end
,case
when dayofweek(
day)=1
then
7else dayofweek(
day)-1
endas dw2
,date_add(
day,1-
case
when dayofweek(
day)=1
then
7else dayofweek(
day)-1
end)
as mo_s -- 周一_start
,date_add(
day,7-
case
when dayofweek(
day)=1
then
7else dayofweek(
day)-1
end)
as su_e -- 週日_end
,to_date(concat(
year
(day),
'-',lpad(ceil(
month
(day)/
3)*3
-2,2
,0),
'-01'))
as season_first_day -- 當季第一天
,trunc(
day,
'mm'
)as month_first_day  -- 當月第一天
,trunc(
day,
'yy'
)as year_first_day   -- 當年第一天
,last_day(add_months(trunc(
day,
'yy'),
12))as year_last_day    -- 當年最後一天
,last_day(
day)
as month_last_day   -- 當月最後一天
,last_day(to_date(concat(
year
(day),
'-',lpad(ceil(
month
(day)/
3)*3
,2,0
),'-01'))
)as season_last_day  -- 當季最後一天
,weekofyear(
day)
as weekofyear1       -- 當年第幾周
,weekofyear(
'2019-08-07'
)- weekofyear(trunc(
'2019-08-07'
,'mm'))
+1as weekofmonth1   --當月第幾周
,second
(day)as
second
-- 秒鐘
,minute
(day)as
minute
-- 分鐘
,hour
(day)as
hour
-- 小時
,day
(day)as
day-- 日期
,month
(day)as
month
-- 月份
,lpad(ceil(
month
(day)/
3),2
,0)as season           -- 季度
,year
(day)as
year
-- 年份
from
(select
'2020-04-01'
asday
union
allselect
'2020-04-02'
asday
union
allselect
'2020-04-03'
asday
union
allselect
'2020-04-04'
asday
union
allselect
'2020-04-05'
asday
union
allselect
'2020-04-06'
asday
union
allselect
'2020-04-07'
asday
union
allselect
'2020-04-08'
asday
union
allselect
'2020-04-09'
asday
union
allselect
'2020-04-10'
asday
union
allselect
'2020-04-11'
asday
union
allselect
'2020-04-12'
asday
union
allselect
'2020-04-13'
asday
union
allselect
'2020-04-14'
asday
union
allselect
'2020-04-15'
asday
union
allselect
'2020-04-16'
asday
union
allselect
'2020-04-17'
asday
union
allselect
'2020-04-18'
asday
union
allselect
'2020-04-19'
asday
union
allselect
'2020-04-20'
asday
union
allselect
'2020-04-21'
asday
union
allselect
'2020-04-22'
asday
) t1

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