取最大值的记录

    如何取表中某个字段的最大值的记录，当然有很多办法，可是一直想一个简单sql搞定，今年看着例子想了好久才蹩过这个弯儿来，趁没忘记录一下——其实是例子没看仔细，这个悄悄说，不要让别人听到
    取某人在去年的最高 月均资产(avg_asset) 记录

	select
		account_id,
    month_id,
    end_balance_rmb+end_balance_usd+end_balance_hk,
    end_stockvalue_rmb+end_balance_hk+end_balance_usd,
    end_asset,
    end_balance_rmb+end_balance_usd+end_balance_hk+end_gj_stockvalue,
    (end_asset+end_unbond_balance)-(begin_asset+begin_unbond_balance)-(total_in_deposit+total_out_deposit+total_in_stockvalue+total_out_stockvalue),
    (total_out_deposit+total_in_deposit),
    total_in_stockvalue+total_out_stockvalue,
    total_commis,
    case when gj_match_balance=0 then 0 else
              gj_commis/gj_match_balance end,
    total_interest,
    total_commis+total_interest,
    total_match_balance,
    case when total_match_balance=0 then 0 else
              nolocal_match_balance / total_match_balance end,
    case when total_match_balance=0 then 0 else
              web_match_balance / total_match_balance end,
    case when avg_asset = 0 then 0 else
              total_match_balance / avg_asset end,
    end_of_stockvalue
    from 
  (
  select max(t.AVG_ASSET) over (partition by t.account_id) asset,  t.*
  from olap.vw_fact_account_by_month t
	where t.account_id=i_account_id and t.month_id >= 200801 and t.month_id <=  200812
      ) e
  where e.asset=e.AVG_ASSET;