ORA-00920：無效的關係運算符在where子句中

Question

我得到ORA-00920: invalid relational operator錯誤，當我跟隨contion到我的where子句。

and (round(to_number(c.rest_time - a.TIME_STAMP) * 24 * 60)) > 5 

全部Where子句

From TableA a,TableB b 
    where round(to_number(a.rest_time - a.time_stamp) * 24 * 60)) > 5 
    and a.time_stamp > '05-12-2014 22:00:00' 
    and a.rest_time < '05-14-2014 14:00:00' 
    and a.dev = 'CUSTOMER' 
    and b.xid = a.xid 
    and b.accno = a.accno 
    and b.name is not null 
    and b.dis is null 

Answer 1

你有多餘的右括號。它應該是... where round(to_number(a.rest_time - a.time_stamp) * 24 * 60) > 5 ...

例如，

-- your case (throws invalid relational operator): 
select 1 from dual where round(to_number(sysdate- sysdate) * 24 * 60)) > 5 ; 

--corrected : 
select 1 from dual where round(to_number(sysdate- sysdate) * 24 * 60) > 5 ;