即使列名相同，也会出现 ORA 无效标识符错误 - 00904

Question

我已经使用

with

语句在过程中引入和获取数据，但在执行时出现错误：

错误（550,37）：PL/SQL：ORA-00904：“Q2_DATA”。“AR_LENGTH”：无效标识符

这是我的询问

WITH    
    q1_data (SPAN_ID, MAINT_ZONE_CODE, NE_LENGTH, UG_LENGTH, AR_LENGTH) AS
        ( SELECT   rj_span_id AS SPAN_ID,
                  rj_maintenance_zone_code AS maint_zone_code,
                  Round(SUM(Nvl(calculated_length, 0) / 1000), 4) AS NE_LENGTH,
                  Round(SUM(
                  CASE
                           WHEN rj_construction_methodology NOT LIKE '%AERIAL%'
                           AND      rj_construction_methodology NOT LIKE '%CLAMP%'
                           OR       rj_construction_methodology IS NULL THEN Nvl(calculated_length, 0)
                           ELSE 0
                  END) / 1000, 4) AS UG_LENGTH,
                  Round(SUM(
                  CASE
                           WHEN rj_construction_methodology LIKE '%AERIAL%'
                           OR       rj_construction_methodology LIKE '%CLAMP%' THEN Nvl(calculated_length, 0)
                           ELSE 0
                  END) / 1000, 4) AS AR_LENGTH
         FROM     ne.mv_span@ne
         WHERE    Trim(rj_span_id) = PSPAN_ID
         AND      inventory_status_code = 'IPL'
         AND      NOT Regexp_like (Nvl(rj_intracity_link_id, '-'), '_9', 'i')
         AND      rj_maintenance_zone_code = PMAINTZONECODE
         GROUP BY rj_span_id,
                  rj_maintenance_zone_code
        ), 
    q2_data (SPAN_ID, MAINT_ZONE_CODE, NE_LENGTH, UG_LENGTH, AR_LENGTH) AS
        ( 
        SELECT span_id as SPAN_ID,
              maintenancezonecode       AS MAINT_ZONE_CODE,
              maint_zone_ne_span_length AS NE_LENGTH,
              fsa_ug                    AS UG_LENGTH,
              fsa_aerial                AS AR_LENGTH
       FROM   tbl_fiber_inv_jobs
       WHERE  span_id = PSPAN_ID
        )
SELECT     
            q1.SPAN_ID, q1.MAINT_ZONE_CODE, 
            q1_data.NE_LENGTH - Nvl(q2_data.NE_LENGTH, 0) as NE_LENGTH, 
            q1_data.UG_LENGTH - Nvl(q2_data.UG_LENGTH, 0) as UG_LENGTH,
            q1_data.AR_LENGTH - Nvl(q2_data.AR_LENGTH, 0) as AR_LENGTH
            
FROM        q1_data q1
LEFT JOIN   q2_data q2  ON(q2.SPAN_ID = q1.SPAN_ID)
ORDER BY    q1.SPAN_ID, q1.MAINT_ZONE_CODE;

Answer 1

问题不在于你的

WITH

子句，而在于你底部的别名：

SELECT     
            q1.SPAN_ID, q1.MAINT_ZONE_CODE, 
            q1_data.NE_LENGTH - Nvl(q2_data.NE_LENGTH, 0) as NE_LENGTH, 
            q1_data.UG_LENGTH - Nvl(q2_data.UG_LENGTH, 0) as UG_LENGTH,
            q1_data.AR_LENGTH - Nvl(q2_data.AR_LENGTH, 0) as AR_LENGTH
            
FROM        q1_data q1
LEFT JOIN   q2_data q2 

您将

q1_data

别名为

q1

，将

q2_data

别名为

q2

。一旦您在行源（

from

子句中的类表对象）上放置别名，对该表中列的任何完全限定引用（以及任何表引用提示）都必须使用提供的 alias，不是对象名称。所以只需将其更改为：

SELECT     
            q1.SPAN_ID, q1.MAINT_ZONE_CODE, 
            q1.NE_LENGTH - Nvl(q2.NE_LENGTH, 0) as NE_LENGTH, 
            q1.UG_LENGTH - Nvl(q2.UG_LENGTH, 0) as UG_LENGTH,
            q1.AR_LENGTH - Nvl(q2.AR_LENGTH, 0) as AR_LENGTH
            
FROM        q1_data q1
LEFT JOIN   q2_data q2