Oracle中的SQL错误？

Question

我正在尝试获取SQL Oracle中count列的总数，但我不断收到THE错误：

ORA-00907 missing the right parenthesis

谁能帮我解决此错误？

这是我的查询：

select isnull(s.years, 'Total') as Grade, count(*) as cnt1, c.firstname, c.lastname
from(
    Select s.years, SUM(count(*) as cnt1), c.firstname, c.lastname
    from employees cc 
    inner join building1 c on cc.id = c.bldid
    inner join members s on s.id = cc.id  
    where sec.LastName = 'Cook'
    group by s.years WITH ROLLUP, c.firstname, c.lastname
    order by s.years, c.firstname, c.lastname
    ) as cnt

Answer 1

select isnull(cnt.years, 'Total') Grade, count(*) as cnt1, cnt.firstname, cnt.lastname
from(
Select s.years, SUM(count(*)) as cnt1, c.firstname, c.lastname
from employees cc 
inner join building1 c on cc.id = c.bldid
inner join members s on s.id = cc.id  
where sec.LastName = 'Cook'
group by s.years WITH ROLLUP, c.firstname, c.lastname
order by s.years, c.firstname, c.lastname
) cnt  --you have to use this to reference columns in the outer query

您正在从名为cnt的内部查询中进行选择。 您应该使用它来引用外部查询中的列。

Answer 2

C。 必须用cnt代替。

Answer 3

在ORACLE中，您不能使用ISNULL，使用COALESCE并删除SUM中的别名。

SELECT coalesce(s.years, 'Total') AS Grade, count(*) AS cnt1, c.firstname, c.lastname
FROM (SELECT s.years, SUM(count(*)) AS cnt1, c.firstname, c.lastname
    FROM employees cc 
    INNER JOIN building1 c on cc.id = c.bldid
    INNER JOIN members s on s.id = cc.id  
    WHEREsec.LastName = 'Cook'
    group by s.years WITH ROLLUP, c.firstname, c.lastname
    order by s.years, c.firstname, c.lastname
    ) as cnt

Answer 4

从SUM内部删除您的别名。

SELECT isnull(s.years, 'Total') AS Grade, count(*) AS cnt1, c.firstname, c.lastname
FROM (SELECT s.years, SUM(count(*)) AS cnt1, c.firstname, c.lastname
      FROM employees cc 
      INNER JOIN building1 c ON cc.id = c.bldid
      INNER JOIN members s ON s.id = cc.id  
      WHERE sec.LastName = 'Cook'
      GROUP BY s.years WITH ROLLUP, c.firstname, c.lastname
      ORDER BY s.years, c.firstname, c.lastname) AS cnt