列'registry_num'不明确

Question

这是我的代码，但是registry_num含糊不清。此外，当我摆脱registry_num结果只返回从我的罪犯表数据。

select first_name, last_name, address1, 
    address2, city, state, 
    start_date, end_date, registry_num 
from offenders left outer join addresses 
on address1 = 'disney' or 'cruise'; 

Answer 1

这主要是猜测，但根据你得到的错误，一个（更多）正确的版本可能是：

Select o.registry_num 
     , o.first_name 
     , o.last_name 
     , a.address1 
     , a.address2 
     , a.city 
     , a.state 
     , o.start_date 
     , o.end_date 
     From offenders o 
Left join addresses a 
     On a.registry_num = o.registry_num 
    Where a.address1 in ('disney', 'cruise') 
     ;