Question

我需要帮助让这段代码正常工作。我正在尝试使用两个sql语句来执行除法。

 select ((select count(p.issued) 
 from permit p
 where trunc(p.issued) >= trunc(TO_DATE('1/1/2011','MM/DD/YYYY')) 
 AND trunc(p.issued) <= trunc(TO_DATE('1/31/2011','MM/DD/YYYY')))
 /
 (select count(p.issued)  
 from permit p
where (TO_DATE(p.issued) - sysdate) <= 21
and trunc(p.issued) >= trunc(TO_DATE('1/1/2011','MM/DD/YYYY')) 
AND trunc(p.issued) <= trunc(TO_DATE('1/31/2011','MM/DD/YYYY')))) as permitPercemt;

Answer 1

您需要再添加一个SELECT：

SELECT ( (select ....)/(select ... )) as permitPercent FROM DUAL;

<强>更新所以你的查询看起来像：

SELECT (
(
  select count(p.issued)  
  from permit p 
  where trunc(p.issued) >= trunc(TO_DATE('1/1/2011','MM/DD/YYYY'))  
  AND trunc(p.issued) <= trunc(TO_DATE('1/31/2011','MM/DD/YYYY'))
) /
(
  select count(p.issued)      
  from permit p    
  where (TO_DATE(p.issued) - sysdate) <= 21    
  and trunc(p.issued) >= trunc(TO_DATE('1/1/2011','MM/DD/YYYY'))     
  AND trunc(p.issued) <= trunc(TO_DATE('1/31/2011','MM/DD/YYYY'))
)
) as permitPercent FROM DUAL;

Answer 2

你没有划分整个选择陈述。

您将两个值分开并将其作为选择列表中的列返回。

无法使PL SQL分为两个select语句

2 个答案: