全面了解Oracle SQL

Question

我在下面的SQL中返回結果，但是我希望價格四舍五入到小數點后6位。

select opt.blo,
  opt.premiumcurrency,
     case
      when opt.structurename is not null then opt.basemarketprice /100
        when pct = 1 then opt.basemarketprice /100
        when pct = 2 then opt.termmarketprice / opt.notional
        when opt.notionalcurrency = opt.premiumcurrency  then opt.basemarketprice /100
        else opt.termmarketpricepercent /100
    end as round(price,6)
from interafce opt

當我在下面添加時，它給我錯誤

ORA-00923：在哪里找不到FROM關鍵字

謝謝你的幫助。

Answer 1

該case需要進入round() 。 您將函數與別名混淆：

 round(case when opt.structurename is not null then opt.basemarketprice /100
            when pct = 1 then opt.basemarketprice /100
            when pct = 2 then opt.termmarketprice / opt.notional
            when opt.notionalcurrency = opt.premiumcurrency  then opt.basemarketprice /100
            else opt.termmarketpricepercent /100
       end, 6) as roundedPrice

Answer 2

結束，因為回合（價格，6）不起作用。 您將列別名為“ round（price，6）”

寧願做一個

select .....
....
when opt.structurename is not null then round(opt.basemarketprice /100,6)
        when pct = 1 then round(opt.basemarketprice /100,6)
        when pct = 2 then round(opt.termmarketprice / opt.notional,6)
        when opt.notionalcurrency = opt.premiumcurrency  then round(opt.basemarketprice /100,6)
        else round(opt.termmarketpricepercent /100,6)
    end as rounded_price