怎樣才能修改此select語句

我怎麼能修改下面工會SELECT語句中的任意連接select語句的方法，其從表1和表2總結的價格，我想還有，怎樣才能修改此select語句

select CODE, SUM(PRICE) as PRICE 
from (SELECT CODE, SUM(PRICE) as PRICE 
     FROM TABLE1 
     where ID='IBK' and cast(TMSTAMP_UPDATE as DATE)='2014-03-31' 
     GROUP BY CODE 
     union 
     SELECT CODE, SUM(PRICE) as PRICE 
     FROM TABLE2 
     where ID='IBK' and cast(TMSTAMP_UPDATE as DATE)='2014-03-31' 
     GROUP BY CODE) GROUP BY CODE;

謝謝提前

來源

2014-03-31 Apache

我不明白你的問題在所有。你可以嘗試改寫它嗎？ –

你能否解釋一下爲什麼一個連接會成爲一個問題，還有一個商業目的是從一個連接改變它 – skv

嘗試像這樣

select CODE, SUM(PRICE) as PRICE 
from (SELECT CODE, SUM(PRICE) as PRICE 
     FROM TABLE1 t1 INNER JOIN TABLE2 t2 ON 
     t1.ID=t2.ID and 
     t1. cast(TMSTAMP_UPDATE as DATE)='2014-03-31' 
     = t2.cast(TMSTAMP_UPDATE as DATE)='2014-03-31' and 
     t1.ID='IBK' and t1.cast(TMSTAMP_UPDATE as DATE)='2014-03-31' 
GROUP BY CODE) GROUP BY CODE;

來源

2014-03-31 04:02:13 Sathish

怎樣才能修改此select語句

回答

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