Sql 使用别名访问Oracle ROWNUMBER

我有一个Oracle查询

WITH cte AS (
SELECT

    category_id,
    category_name,
    parent_category_id,
    ltrim(sys_connect_by_path(category_name, '/'), '/') "ParentNames"       
FROM
    bg_categories
START WITH
    parent_category_id = - 1
CONNECT BY NOCYCLE
    PRIOR category_id = parent_category_id
 )
 SELECT
ROW_NUMBER() OVER (
    ORDER BY 
      bco.ID desc
  ) AS SLNO,
bco.*,
cte.*,

(
    SELECT
        COUNT(*)
    FROM
        object_document obj
    WHERE
        obj.object_id = bco.id
        AND object_type_id = 85
) AS customobjects_doc_count 
 FROM
bg_custom_objects bco
JOIN cte ON ( cte.category_id = bco.category_id )  where SLNO between 10 and 25

此查询在结尾处没有“where SLNO介于10和25之间”where语句的情况下运行良好，但在此情况下显示“SLNO invalid identifier”错误

---

请提供帮助。

您需要使用内联视图/cte将其包装起来：

WITH cte AS (
  SELECT
    category_id,
    category_name,
    parent_category_id,
    ltrim(sys_connect_by_path(category_name, '/'), '/') "ParentNames"       
  FROM bg_categories
  START WITH parent_category_id = - 1
  CONNECT BY NOCYCLE
  PRIOR category_id = parent_category_id
), cte2 AS (
  SELECT
   ROW_NUMBER() OVER (ORDER BY bco.ID desc) AS SLNO
      --,bco.* -- columns should be listed explicitly
      --,cte.* -- columns should be listed explicitly
  ,(
    SELECT COUNT(*)
    FROM object_document obj
    WHERE obj.object_id = bco.id
      AND object_type_id = 85
  ) AS customobjects_doc_count 
  FROM bg_custom_objects bco
  JOIN cte ON ( cte.category_id = bco.category_id )
)
SELECT *
FROM cte2
WHERE SLNO BETWEEN 10 AND 25;

如果两个别名位于同一级别，则不能使用在

SELECT

in

WHERE

子句中直接定义的别名，因为它不可见

---

此外，您也无法将

行编号

移动到

中

的位置

您需要使用内联视图/cte对其进行包装：

WITH cte AS (
  SELECT
    category_id,
    category_name,
    parent_category_id,
    ltrim(sys_connect_by_path(category_name, '/'), '/') "ParentNames"       
  FROM bg_categories
  START WITH parent_category_id = - 1
  CONNECT BY NOCYCLE
  PRIOR category_id = parent_category_id
), cte2 AS (
  SELECT
   ROW_NUMBER() OVER (ORDER BY bco.ID desc) AS SLNO
      --,bco.* -- columns should be listed explicitly
      --,cte.* -- columns should be listed explicitly
  ,(
    SELECT COUNT(*)
    FROM object_document obj
    WHERE obj.object_id = bco.id
      AND object_type_id = 85
  ) AS customobjects_doc_count 
  FROM bg_custom_objects bco
  JOIN cte ON ( cte.category_id = bco.category_id )
)
SELECT *
FROM cte2
WHERE SLNO BETWEEN 10 AND 25;

如果两个别名位于同一级别，则不能使用在

SELECT

in

WHERE

子句中直接定义的别名，因为它不可见

---

此外，您也无法将

行号

移动到

的WHERE

位置

感谢您的回复，我之前也尝试过这个方法，但没有WHERE条件，它显示错误“列定义模糊”和行23@Chanky不要使用别名。*。明确定义列库，选择所需列，现在正在执行感谢您的响应，我以前也尝试过使用额外的cte，但没有where条件，它显示错误“列定义模糊”和行23@Chanky不要使用别名。*。明确定义列库、选定的必需列，它现在正在执行