Question

我有一张数据如下的表。我的要求是，如果FK具有类别M，则忽略FK的所有行。查询应仅返回类别为N且类型为Z的那些行。同样，FK也被表示为（在（A，B）中）基本上在下面的示例中，我需要将输出作为PK 5的行。

UPDATE "atul_sso"."ATL_SSO_ACCESS_REQ_DETAILS"@"mysql_atulsso.atul.co.in"
SET "atul_sso"."ATL_SSO_ACCESS_REQ_DETAILS"."REQ_TYPE"@"mysql_atulsso.atul.co.in"= 'r2' 
WHERE "atul_sso"."ATL_SSO_ACCESS_REQ_DETAILS"."REQ_TYPE"@"mysql_atulsso.atul.co.in"='r1';

谢谢

Answer 1

为什么不尝试

   SELECT *
  FROM tab_name
 WHERE     UPPER (category) = 'N'
       AND UPPER (type) = 'Z'
       AND UPPER (fk) IN ('A', 'B')

SQL Fiddle

WITH t
     AS (SELECT 1 AS pk,
                'A' AS fk,
                'L' AS category,
                'X' AS TYPE
           FROM DUAL
         UNION
         SELECT 2 AS pk,
                'A' AS fk,
                'M' AS category,
                'Y' AS TYPE
           FROM DUAL
         UNION
         SELECT 3 AS pk,
                'A' AS fk,
                'N' AS category,
                'Z' AS TYPE
           FROM DUAL
         UNION
         SELECT 4 AS pk,
                'B' AS fk,
                'L' AS category,
                'X' AS TYPE
           FROM DUAL
         UNION
         SELECT 5 AS pk,
                'B' AS fk,
                'N' AS category,
                'Z' AS TYPE
           FROM DUAL
         UNION
         SELECT 6 AS pk,
                'C' AS fk,
                'L' AS category,
                'X' AS TYPE
           FROM DUAL
         UNION
         SELECT 7 AS pk,
                'C' AS fk,
                'M' AS category,
                'Y' AS TYPE
           FROM DUAL
         UNION
         SELECT 8 AS pk,
                'C' AS fk,
                'N' AS category,
                'Z' AS TYPE
           FROM DUAL)
(SELECT distinct *
   FROM t
  WHERE     UPPER (category) = 'N'
        AND UPPER (TYPE) = 'Z'
        AND UPPER (fk) IN ('A', 'B'))

输出

╔════╦════╦══════════╦══════╗
║ PK ║ FK ║ CATEGORY ║ TYPE ║
╠════╬════╬══════════╬══════╣
║  3 ║ A  ║ N        ║ Z    ║
║  5 ║ B  ║ N        ║ Z    ║
╚════╩════╩══════════╩══════╝

Answer 2

最简单但可能不是最有效的

SELECT * 
FROM tab_name
WHERE FK not in (SELECT FK FROM tab_name WHERE catergory='M')

Answer 3

尝试一下。

 SELECT *
  FROM table_name
 WHERE Category = 'N' 
     AND Type = 'Z' 
     AND FK IN ('A', 'B');

Answer 4

Try this

Select PK, FK, Category, Type
From tab_name
Where Category = Case when Category = 'M' Then 'N' else Category end
and Type = Case when Category = 'M' Then 'Z' else Type end
and FK in ('A', 'B')

Answer 5

您似乎想要：

select t.*
from t
where t.category = 'N' and t.type = 'Z' and
      not exists (select 1 
                  from t t2
                  where t2.fk = t.fk and t2.category = 'M'
                 );

您还可以使用分析功能：

select t.*
from (select t.*,
             sum(case when category = 'M' then 1 else end) over (partition by fk) as m_cnt
      from t
     ) t
where category = 'N' and type = 'Z' and
      m_cnt = 0;

ORACLE查询，如果一行满足FK条件，则忽略所有行

5 个答案: