以下代码是否有效？我收到错误。

Question

CREATE OR REPLACE VIEW POINTS AS 
DECLARE 
    avgDurationOurFault  number(5); 
    avgDurationCustomersFault number(5); 
    avgDuration   number(5); 

BEGIN 

    (select ceil(avg(abs(total_time))) into avgDuration from inquiry); 

    select ceil(avg(total_duration)) into avgDurationOurFault 
    from 
    (
     select customer_no, sum(abs(total_time)) total_duration 
     from inquiry 
     where cat_id in ('C900', 'C901', 'C902', 'C905', 'C907', 'C908', 'C909') 
     GROUP BY customer_no); 

    select ceil(avg(total_duration)) into avgDurationCustomersFault 
    from 
    (
     select customer_no, sum(abs(total_time)) total_duration 
     from inquiry 
     where cat_id in ('C903','C904', 'C906') 
     group by customer_no); 

    select t1.customer_no, t1.callPoints, t1.durationPoints, t2.catgPoints, 
      t1.callPoints+t1.durationPoints+t2.catgPoints as totalPoints 
    from 
    (
     select customer_no, count(inquiry_id)*avgDuration callPoints , sum(abs(total_time)) durationPoints 
     from inquiry 
     group by customer_no 
     ) t1 

     inner join (

     select customer_no, sum(points) catgPoints 
     from 
     (
     select customer_no, 
      case 
       when cat_id in ('C903','C904', 'C906') 
       then 0 

      when cat_id in ('C900', 'C901', 'C902', 'C905', 'C907', 'C908', 'C909') 
       then 2*avgDuration + abs(avgDurationCustomersFault - avgDurationOurFault) 

      else 
       0 

      end as points 
      from inquiry 
      ) 
      group by customer_no 
      ) t2 

      on t1.customer_no = t2.customer_no; 


END; 
/

-------------------- ERRORS BELOW ----------------------- ----------------------------

Error starting at line 1 in command: CREATE OR REPLACE VIEW POINTS AS DECLARE avgDurationOurFault number(5) Error at Command Line:1 Column:32 Error report: SQL Error: ORA-00928: missing SELECT keyword 00928. 00000 - "missing SELECT keyword" *Cause:
*Action:

Error starting at line 4 in command: avgDurationCustomersFault number(5) Error report: Unknown Command

Error starting at line 5 in command: avgDuration number(5) Error report: Unknown Command

Error starting at line 7 in command:

BEGIN 

(select ceil(avg(abs(total_time))) into avgDuration from inquiry); 

select ceil(avg(total_duration)) into avgDurationOurFault 
from 
(
    select customer_no, sum(abs(total_time)) total_duration 
    from inquiry 
    where cat_id in ('C900', 'C901', 'C902', 'C905', 'C907', 'C908', 'C909') 
    GROUP BY customer_no); 

select ceil(avg(total_duration)) into avgDurationCustomersFault 
from 
(
    select customer_no, sum(abs(total_time)) total_duration 
    from inquiry 
    where cat_id in ('C903','C904', 'C906') 
    group by customer_no); 
select t1.customer_no, t1.callPoints, t1.durationPoints, t2.catgPoints, 
     t1.callPoints+t1.durationPoints+t2.catgPoints as totalPoints 
from 
(
    select customer_no, count(inquiry_id)*avgDuration callPoints , sum(abs(total_time)) durationPoints 
    from inquiry 
    group by customer_no 
    ) t1 

    inner join (
    select customer_no, sum(points) catgPoints 
    from 
    (
    select customer_no, 
     case 
      when cat_id in ('C903','C904', 'C906') 
      then 0 

     when cat_id in ('C900', 'C901', 'C902', 'C905', 'C907', 'C908', 'C909') 
      then 2*avgDuration + abs(avgDurationCustomersFault - avgDurationOurFault) 
     else 
      0 

     end as points 
     from inquiry 
     ) 
     group by customer_no 
     ) t2 

     on t1.customer_no = t2.customer_no; 

END;

Error report: ORA-06550: line 3, column 2: PLS-00103: Encountered the symbol "(" when expecting one of the following:

begin case declare exit for goto if loop mod null pragma raise return select update while with << close current delete fetch lock insert open rollback savepoint set sql execute commit forall merge pipe The symbol "update" was substituted for "(" to continue. ORA-06550: line 3, column 37: PLS-00103: Encountered the symbol "INTO" when expecting one of the following:

. (, * % & - +/at mod rem as from || The symbol ". was inserted before "I ORA-06550: line 3, column 67: PLS-00103: Encountered the symbol ";" when expecting one of the following:

set ORA-06550: line 30, column 3: PLS-00103: Encountered the symbol "INNER" when expecting one of the following:

, ; for group having intersect minus order start union where
connect 06550. 00000 - "line %s, column %s:\n%s" *Cause: Usually a PL/SQL compilation error. *Action:

Answer 1

用途：

CREATE OR REPLACE VIEW POINTS AS 
SELECT a.customer_no, 
     a.callPoints, 
     a.durationPoints, 
     a.catgPoints, 
     a.callPoints + a.durationPoints + a.catgPoints as totalPoints 
    FROM (SELECT i.customer_no, 
       COUNT(i.inquiry_id) * x.avgDuration AS callPoints, 
       SUM(ABS(i.total_time)) durationPoints, 
       SUM(CASE 
        WHEN i.cat_id IN ('C900', 'C901', 'C902', 'C905', 'C907', 'C908', 'C909') THEN 
         2 * x.avgDuration + ABS(z.avgDurationCustomersFault - y.avgDurationOurFault) 
        ELSE 0 
        END) AS catgpoints 
      FROM INQUIRY i 
    CROSS JOIN (SELECT CEIL(AVG(ABS(t.total_time))) AS avgDuration 
        FROM INQUIRY t) x 
    CROSS JOIN (SELECT CEIL(AVG(total_duration)) AS avgDurationOurFault 
        FROM (SELECT SUM(ABS(t.total_time)) AS total_duration 
          FROM INQUIRY t 
         WHERE t.cat_id IN ('C900', 'C901', 'C902', 'C905', 'C907', 'C908', 'C909') 
         GROUP BY t.customer_no) y 
    CROSS JOIN (SELECT CEIL(AVG(total_duration)) AS avgDurationCustomersFault 
        FROM (SELECT SUM(ABS(t.total_time)) AS total_duration 
          FROM INQUIRY 
         WHERE t.cat_id IN ('C903','C904', 'C906') 
         GROUP BY t.customer_no) z 
     GROUP BY i.customer_no) a 

它是可以通过使用CASE语句根据cat_id总结值设置为 “y” 和 “z”，结合起来。其他人可以用它打高尔夫球。

您的查询的问题在于您试图使用多个不相关的SELECT语句。一个视图是一个SELECT语句 - 您可以使用子查询，派生表/内联视图等，但它们必须位于单个查询中，就像我在示例中看到的那样。你发布的内容更像你在存储过程或函数中找到的内容。你不能像使用你想要的那样使用变量，你不需要 - 只需要一个CROSS JOIN。

子查询分解（AKA WITH子句，CTE）可以使用，但通常几乎没有性能优势。

Answer 2

视图不能使用PL/SQL像那样。您必须将所有查询放在一起。类似于CREATE OR REPLACE VIEW POINTS AS [one huge sql statement...]。