Hive SQL常用日期转换
1、yyyyMMdd日期标准化
from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd')
2、取上一月
date_format(add_months(concat(substr(t1.month, 1, 4),'-',cast(substr(t1.month, 5, 2) as int),'-','01'),1),'yyyyMM')
3、yyyyMMdd日期转为季度
concat(substr('${bizdate}',1,4),'-Q',floor(substr('${bizdate}',5,2)/3.1)+1)
4、上周一
select date_sub(current_date(),pmod(datediff(cast(current_date() as string),'2000-01-03'),7)+7)
5、上周日
select date_sub(current_date(),pmod(datediff(cast(current_date() as string),'2000-01-03'),7)+1)
6、上月第一天
select add_months(trunc(current_date(),'MM'),-1)
7、上月最后一天
select date_add(trunc(current_date(),'MM'),-1)
8、当前季度第一天
select to_date(concat(date_format(current_date(),'y'),'-',floor((cast(date_format(current_date(),'M') as int)+2)/3)*3-2,'-',date_format(trunc(current_date(),'MM'),'dd')))
-- 已测试
date_format(concat(substr('${bizdate}',1,4),
'-',floor((cast(substr('${bizdate}',5,2) as int)+2)/3)*3-2,
'-','01'),'yyyy-MM-dd')
9、当前季度最后一天
select to_date(concat(date_format(current_date(),'y'),'-',floor((cast(date_format(current_date(),'M') as int)+2)/3)*3,'-','31'))
10、去年第一天
select add_months(trunc(current_date(),'YY'),-12)
11、去年最后一天
select date_add(trunc(current_date(),'YY'),-1)
12 、当前周第一天
select date_add(from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd'),1 - case when dayofweek(from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd')) = 1 then 7 else dayofweek(from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd')) - 1 end) as Mo_s
13、当前周最后一天
select date_add(from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd'),7 - case when dayofweek(from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd')) = 1 then 7 else dayofweek(from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd')
14、日期处理大杂烩
select
day -- 时间
,date_add(day,1 - dayofweek(day)) as week_first_day -- 本周第一天_周日
,date_add(day,7 - dayofweek(day)) as week_last_day -- 本周最后一天_周六
,date_add(day,1 - case when dayofweek(day) = 1 then 7 else dayofweek(day) - 1 end) as week_first_day -- 本周第一天_周一
,date_add(day,7 - case when dayofweek(day) = 1 then 7 else dayofweek(day) - 1 end) as week_last_day -- 本周最后一天_周日
,next_day(day,'TU') as next_tuesday -- 当前日期的下个周二
,trunc(day,'MM') as month_first_day -- 当月第一天
,last_day(day) as month_last_day -- 当月最后一天
,to_date(concat(year(day),'-',lpad(ceil(month(day)/3) * 3 -2,2,0),'-01')) as season_first_day -- 当季第一天
,last_day(to_date(concat(year(day),'-',lpad(ceil(month(day)/3) * 3,2,0),'-01'))) as season_last_day -- 当季最后一天
,trunc(day,'YY') as year_first_day -- 当年第一天
,last_day(add_months(trunc(day,'YY'),12)) as year_last_day -- 当年最后一天
,weekofyear(day) as weekofyear -- 当年第几周
,second(day) as second -- 秒钟
,minute(day) as minute -- 分钟
,hour(day) as hour -- 小时
,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 '2018-01-02 01:01:01' as day union all
select '2018-02-02 02:03:04' as day union all
select '2018-03-02 03:05:07' as day union all
select '2018-04-02 04:07:10' as day union all
select '2018-05-02 05:09:13' as day union all
select '2018-06-02 06:11:16' as day union all
select '2018-07-02 07:13:19' as day union all
select '2018-08-02 08:15:22' as day union all
select '2018-09-02 09:17:25' as day union all
select '2018-10-02 10:19:28' as day union all
select '2018-11-02 11:21:31' as day union all
select '2018-12-02 12:23:34' as day
) t1
;
15、营销周
select
concat(substr(year_mon,1,4),substr(year_mon,6,2)) as year_mon, -- 年月
mkt_week_id_of_mth, -- 当月第几个营销周
(
case when substr(mkt_weekend_date,9,2)<=7 then concat(substr(mkt_weekend_date,1,8),'01')
else date_sub(mkt_weekend_date,cast(date_format(mkt_weekend_date,'u') as int))
end
) as start_natural_weekend_date, -- 自然周一日期
mkt_weekend_date -- 自然周末日期
from
ld_brc_corp_prd.s_dim_date
where
ds = '${bizdate}'
and long_date_id <= from_unixtime(unix_timestamp('${bizdate}', 'yyyyMMdd'),'yyyy-MM-dd')
group by
year_mon,mkt_week_id_of_mth,mkt_weekend_date
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