【1】先根据表中数据计算出需要的值，存储在临时表里面，比如计算日活跃度的语句：
with tbl_dau as
(
select 'dau' as name, count(distinct deviceid) as cnt
from
(
select deviceid from src_huidu_zl.event3 where hdfs_par = '20170108'
union all
select deviceid from src_huidu_zl.page3 where hdfs_par = '20170108'
) as tmp
)
另外，计算历史峰值的逻辑比较复杂，例子如下：
historymaxnewdev as(
select if(regexp_extract(json_value, '\"maxnewdev\"\:(\\d+(\\.\\d+)*)',1)='','1',regexp_extract(json_value, '\"maxnewdev\"\:(\\d+(\\.\\d+)*)',1)) as historymaxvalue,if(regexp_extract(json_value, '\"maxnewdev\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)='','19710101',regexp_extract(json_value, '\"maxnewdev\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)) as historydate from ana_fx_goal.zl_daily_kv where json_key = 'daily_static' and hdfs_par='20170108'
)
该行语句先从zl_daily_kv 表里面读取出历史峰值，通过正则表达式提取出新设备的历史峰值（提取前的格式为：677777||20161026，前面的数值可能带小数点），然后将历史峰值与今天的新数据对比，找出新的最大值，并更新相应的峰值。
【2】拼接JSON字符串
【3】以‘daily_static’为键值存储第二步的结果
下面是完整的程序：
insert overwrite ana_fx_goal.zl_daily_kv partition(hdfs_par='20170108')
select * from
(
select cast(
concat(substr('20170108', 1, 4), '-', substr('20170108', 5, 2), '-', substr('20170108', 7, 2)) as timestamp) as day_begin,
NOW() as generate_time,
'daily_static' as json_key,
json_output as json_value
from
(
select concat( '{',
group_concat(
concat(wrapped_column_key, ':', wrapped_column_value),
','),
'}'
) as json_output
from
(
select
concat('"', name, '"') as wrapped_column_key,
case
when cnt is null then 'null'
when 'double' = 'string' then concat('"', cast(cnt as string), '"')
else cast(cnt as string)
end as wrapped_column_value
from
(
with tbl_dau as
(
select 'dau' as name, count(distinct deviceid) as cnt
from
(
select deviceid from src_huidu_zl.event3 where hdfs_par = '20170108'
union all
select deviceid from src_huidu_zl.page3 where hdfs_par = '20170108'
) as tmp
),
tbl_launchrecords as
(
select 'launchrecords' as name, count(*) as cnt
from
src_huidu_zl.launch2
where hdfs_par = '20170108'
),
tbl_newdev as
(
select 'newdev' as name, count(distinct deviceid) as cnt
from ana_fx_middle.devappear2
where first_appear_hdfspar = '20170108' and hdfs_par = '20170108'
),
tbl_avgusetime as
(
select 'avgusetime' as name, avg(use_time) as cnt
from src_huidu_zl.launch2
where hdfs_par = '20170108'
),
tbl_avgdevtime as
(
select 'avgdevtime' as name, sum(use_time)/count(distinct deviceid) as cnt
from src_huidu_zl.launch2
where hdfs_par = '20170108'
),
tbl_alldev as
(
select 'alldev' as name, count(distinct deviceid) as cnt
from ana_fx_middle.devappear2
where hdfs_par = '20170108'
),
tbl_mau as
(
select 'mau' as name, count(distinct deviceid) as cnt
from
(
select deviceid from src_huidu_zl.event3 where hdfs_par between '20161211' and '20170108'
union all
select deviceid from src_huidu_zl.page3 where hdfs_par between '20161211' and '20170108'
) as tmp
),
tbl_avglaunchrecords as
(
select 'avglaunchrecords' as name, count(*)/count(distinct deviceid) as cnt
from src_huidu_zl.launch2
where hdfs_par = '20170108'
),
tbl_launchdays as
(
select sum(cnt) as cnt
from
(
select hdfs_par, count(distinct deviceid) as cnt
from src_huidu_zl.launch2
where hdfs_par between '20161211' and '20170108'
group by hdfs_par
) as tmp
),
tbl_launchdevs as
(
select count(distinct deviceid) as cnt
from src_huidu_zl.launch2
where hdfs_par between '20161211' and '20170108'
),
tbl_28new7retain as
(
select '28new7retain' as name, count(distinct tbl_7day.deviceid) as cnt
from
(
select deviceid from src_huidu_zl.event3 where hdfs_par between '20170101' and '20170108'
union all
select deviceid from src_huidu_zl.page3 where hdfs_par between '20170101' and '20170108'
) as tbl_7day
left join
(
select distinct deviceid as deviceid
from ana_fx_middle.devappear2
where first_appear_hdfspar = '20161211'
) as tbl_28day
on tbl_7day.deviceid = tbl_28day.deviceid
where tbl_28day.deviceid != 'NULL'
),
tbl_28new as
(
select '28new' as name, count(distinct deviceid) as cnt
from ana_fx_middle.devappear2
where first_appear_hdfspar = '20161211'
),
historymaxdauvalue as(
select if(regexp_extract(json_value, '\"maxdau\"\:(\\d+(\\.\\d+)*)',1)='','1',regexp_extract(json_value, '\"maxdau\"\:(\\d+(\\.\\d+)*)',1)) as historymaxvalue,if(regexp_extract(json_value, '\"maxdau\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)='','19710101',regexp_extract(json_value, '\"maxdau\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)) as historydate from ana_fx_goal.zl_daily_kv where json_key = 'daily_static' and hdfs_par='20170108'
),
historymaxlaunchrecords as(
select if(regexp_extract(json_value, '\"maxlaunchrecords\"\:(\\d+(\\.\\d+)*)',1)='','1',regexp_extract(json_value, '\"maxlaunchrecords\"\:(\\d+(\\.\\d+)*)',1)) as historymaxvalue,if(regexp_extract(json_value, '\"maxlaunchrecords\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)='','19710101',regexp_extract(json_value, '\"maxlaunchrecords\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)) as historydate from ana_fx_goal.zl_daily_kv where json_key = 'daily_static' and hdfs_par='20170108'
),
historymaxnewdev as(
select if(regexp_extract(json_value, '\"maxnewdev\"\:(\\d+(\\.\\d+)*)',1)='','1',regexp_extract(json_value, '\"maxnewdev\"\:(\\d+(\\.\\d+)*)',1)) as historymaxvalue,if(regexp_extract(json_value, '\"maxnewdev\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)='','19710101',regexp_extract(json_value, '\"maxnewdev\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)) as historydate from ana_fx_goal.zl_daily_kv where json_key = 'daily_static' and hdfs_par='20170108'
),
historymaxavgusetime as (
select if(regexp_extract(json_value, '\"maxavgusetime\"\:(\\d+(\\.\\d+)*)',1)='','1',regexp_extract(json_value, '\"maxavgusetime\"\:(\\d+(\\.\\d+)*)',1)) as historymaxvalue,if(regexp_extract(json_value, '\"maxavgusetime\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)='','19710101',regexp_extract(json_value, '\"maxavgusetime\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)) as historydate from ana_fx_goal.zl_daily_kv where json_key = 'daily_static' and hdfs_par='20170108'
),
historymaxavgdevtime as (
select if(regexp_extract(json_value, '\"maxavgdevtime\"\:(\\d+(\\.\\d+)*)',1)='','1',regexp_extract(json_value, '\"maxavgdevtime\"\:(\\d+(\\.\\d+)*)',1)) as historymaxvalue,if(regexp_extract(json_value, '\"maxavgdevtime\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)='','19710101',regexp_extract(json_value, '\"maxavgdevtime\":(\"\\d+(\\.\\d+)*)\\|\\|(\\d{8})\"',3)) as historydate from ana_fx_goal.zl_daily_kv where json_key = 'daily_static' and hdfs_par='20170108'
)
select name,cast(cnt as string) as cnt from tbl_dau
union all
select name,cast(cnt as string) as cnt from tbl_launchrecords
union all
select name,cast(cnt as string) as cnt from tbl_newdev
union all
select name,cast(cnt as string) as cnt from tbl_avgusetime
union all
select name,cast(cnt as string) as cnt from tbl_avgdevtime
union all
select name,cast(cnt as string) as cnt from tbl_alldev
union all
select name,cast(cnt as string) as cnt from tbl_mau
union all
select name,cast(cnt as string) as cnt from tbl_avglaunchrecords
union all
select 'avglaunchdays' as name, cast((tbl_launchdays.cnt/tbl_launchdevs.cnt) as string) as cnt from tbl_launchdays, tbl_launchdevs
union all
select 'retainratio' as name, cast((tbl_28new7retain.cnt/tbl_28new.cnt) as string) as cnt from tbl_28new, tbl_28new7retain
union all
select 'maxdau' as name, if(tbl_dau.cnt>cast(historymaxdauvalue.historymaxvalue as bigint),concat(cast(tbl_dau.cnt as string),'||','20170108'),concat(historymaxdauvalue.historymaxvalue,'||',historydate)) as cnt from tbl_dau,historymaxdauvalue
union all
select 'maxlaunchrecords' as name, if(tbl_launchrecords.cnt>cast(historymaxlaunchrecords.historymaxvalue as bigint),concat(cast(tbl_launchrecords.cnt as string),'||','20170108'),concat(historymaxlaunchrecords.historymaxvalue,'||',historydate)) as cnt from tbl_launchrecords,historymaxlaunchrecords
union all
select 'maxnewdev' as name, if(tbl_newdev.cnt>cast(historymaxnewdev.historymaxvalue as bigint),concat(cast(tbl_newdev.cnt as string),'||','20170108'),concat(historymaxnewdev.historymaxvalue,'||',historydate)) as cnt from tbl_newdev,historymaxnewdev
union all
select 'maxavgusetime' as name, if(tbl_avgusetime.cnt>cast(historymaxavgusetime.historymaxvalue as bigint),concat(cast(tbl_avgusetime.cnt as string),'||','20170108'),concat(historymaxavgusetime.historymaxvalue,'||',historydate)) as cnt from tbl_avgusetime,historymaxavgusetime
union all
select 'maxavgusetime' as name, if(tbl_avgdevtime.cnt>cast(historymaxavgdevtime.historymaxvalue as bigint),concat(cast(tbl_avgdevtime.cnt as string),'||','20170108'),concat(historymaxavgdevtime.historymaxvalue,'||',historydate)) as cnt from tbl_avgdevtime,historymaxavgdevtime
) as tmp1_B
) as tmp2_B
) as tmp
limit 1
) as t1
union all
select * from
(
select
day_begin,
generate_time,
json_key,
json_value
from ana_fx_goal.zl_daily_kv
where hdfs_par = '20170108'
and json_key != 'daily_static'
) as t2
;