把select结果update更新到表中,从查询结果中更新数据

mysql

update dw.agt_acco_balance a inner join (
select 
    account_num,
    sum(actual_recharge_amount) as sum,
    count(*) 
from ods.sl_topup_00000000001 b
inner join dw.agt_acco_balance c 
on b.account_num=c.acco_num
group by b.account_num
) as temp
on a.acco_num=temp.account_num
set a.balance=a.balance+temp.sum;

PostgreSQL

update dw.agt_acco_balance a
set balance=balance+temp.sum
from (
select 
    account_num,
    sum(actual_recharge_amount) as sum,
    count(*) 
from ods.sl_topup_00000000001 b
inner join dw.agt_acco_balance c 
on b.account_num=c.acco_num
group by b.account_num
) as temp
where a.acco_num=temp.account_num;

update dw.agt_acco_balance a
set balance=balance+temp.sum
from (
select 
    account_num,
    sum(actual_recharge_amount) as sum,
    count(*) 
from ods.sl_topup_00000000001 b
inner join dw.agt_acco_balance c 
on b.account_num=c.acco_num and c.source='sl_account_00000000001'
group by b.account_num
) as temp
where a.acco_num=temp.account_num and a.source='sl_account_00000000001';

参考：

　　1）mysql 把select结果update更新到表中,从查询结果中更新数据

　　2) mysql和Postgresql通过查询进行更新区别