Question

运行以下代码时，我看到以下错误。

无法评估不支持的子查询类型

当我注释第三条select语句并运行查询时，查询将与结果一起运行。该错误在最后一个select语句中弹出。

我可以知道如何在查询中放入最后一个选择语句吗？

SELECT "A1" as CUT
       ,"B1" as SERV
       ,"c1" as NAME
       ,"D1"
       ,"E1" as REP 
       ,(SELECT COUNT(ACT2."B1") 
         FROM AAA as ACT2 
         WHERE ACT2."AST" in ('A', 'T') 
            and ACT2."UCE" = 'IN' 
            and ACT2."CUST" = ACT."CUST") as NCount
       ,(SELECT ACT2."B1" 
         FROM AAA as ACT2 
         WHERE ACT2."AST" in ('A', 'T') 
            and ACT2."UCE" = 'IN' 
            and ACT2."CUST" = ACT."CUST" 
         LIMIT 1) as INTER
FROM BBB
left outer join AAA as ACT 
   on "WNB" = ACT."B1" 
WHERE "PCD" in ('PD', 'PD2') 
   and "PDT" = 0 
   and ACT."AST" in ('A', 'T')

Answer 1

如果没有运行此代码，则您将加入可以使用CTE的事物。鉴于缺乏b1 ANY_VALUE这种类型，可以使用。

WITH inters AS (
    SELECT cust
        ,ANY_VALUE(b1) AS b1
    FROM AAA
    WHERE ast IN ('A', 'T') AND uce = 'IN' 
    GROUP BY cust
)           
SELECT a1 AS cut
    ,b1 AS serv
    ,c1 AS name
    ,d1
    ,e1 AS rep 
    ,(SELECT COUNT(ACT2."B1") FROM AAA as ACT2 WHERE ACT2."AST" in ('A', 'T') and ACT2."UCE" = 'IN' and ACT2."CUST" = ACT."CUST") as NCount
    ,i.b1 AS INTER
FROM BBB
LEFT JOIN aaa AS act 
    ON wnb = act.b1 
LEFT JOIN inters AS i
    ON i.cust = act.cust
WHERE pcd IN ('PD', 'PD2') 
    AND pdt = 0 
    AND act.ast IN ('A', 'T')

但是第一个子选择使用与秒相同的源表和过滤器，因此也可以按以下方式移至CTE：

WITH inters AS (
    SELECT cust
        ,ANY_VALUE(b1) AS b1
        ,COINT(b1) AS ncount
    FROM AAA
    WHERE ast IN ('A', 'T') AND uce = 'IN' 
    GROUP BY cust
)           
SELECT a1 AS cut
    ,b1 AS serv
    ,c1 AS name
    ,d1
    ,e1 AS rep 
    ,i.ncount
    ,i.b1 AS INTER
FROM BBB
LEFT JOIN aaa AS act 
    ON wnb = act.b1 
LEFT JOIN inters AS i
    ON i.cust = act.cust
WHERE pcd IN ('PD', 'PD2') 
    AND pdt = 0 
    AND act.ast IN ('A', 'T')

应该比第一个代码更好。

根据aaa表的大小，通过添加另一个对ast IN ('A', 'T')进行过滤的CTE可能会获得一些性能提升，然后inters CTE和主SELECT使用它们，因为它们都将读取同一张桌子两次。但是，这方面会受到满足其他约束的数据量的影响。

雪花中出现错误“无法评估不支持的子查询类型”

1 个答案: