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INSERT INTO SELECT & SELECT INTO FROM
INSERT INTO SELECT
insert into risk_warning_indicator_hourly_report
select id, risk_indicator_id, hour, value, total, (
case
when last_total=0 then 0
else (new_total::numeric - last_total::numeric) / last_total::numeric
end
) as ratio_inc, now()
from (
select id, risk_indicator_id, hour, value, total,
row_number() over (partition by value order by hour) rn,
nth_value(total, 1) over (partition by value order by hour) last_total,
nth_value(total, 2) over (partition by value order by hour) new_total
from risk_indicator_hourly_report
where (hour = '2019-03-25 16:00:00' or hour = '2019-03-26 16:00:00')
) as tab
where tab.rn = 2;
SQL INSERT INTO SELECT 语句
SELECT INTO 和 INSERT INTO SELECT 两种表复制语句
case when
-- 查询每个时间段的数据
select risk_indicator_id, hour,
SUM(case when total > 0 and total <= 5 then 1 else 0 end) as one_to_five,
SUM(case when total > 5 and total <= 10 then 1 else 0 end) as five_to_ten,
SUM(case when total > 10 and total <= 15 then 1 else 0 end) as tenToFifteen,
SUM(case when total > 15 and total <= 20 then 1 else 0 end) as fifteenToTwenty,
SUM(case when total > 20 and total <= 25 then 1 else 0 end) as twentyToTwentyFive,
SUM(case when total > 25 then 1 else 0 end) as twentyFivePlus
from risk_indicator_hourly_report
group by hour, risk_indicator_id
SQL的case when then else end语句的用法
分页
MySQL
select *
from table
offset (pageNo - 1) * pageSize
limit pageSize
drop
insert
insert into risk_warning_indicator(name) values('ratio_inc');
update
update risk_warning_rule
set risk_name='test_update_6', risk_type=2, risk_level=2, expressions='ratio_inc>1', whether_to_alert=true,
alert_freq=1, alert_emails='[email protected]', alert_email_subject='update_email1', update_time=now()
where id = 6
returning id