[英]Oracle invalid identifier error
我在内部查询的where子句中获取了t.ev_no的oracle无效标识符错误
首先,让我解释一下我的表结构和查询的目的。 我有一个名为vendor的表,其中包含以下列
我将在gridview中显示此信息,但地址是单个列,其中包含每个单独行上的address1,address2,address3,city,state和zip。 如果这些列中的任何一个为NULL,那么我必须跳过换行符。 因此内部查询用case来处理这个问题。
问题是某种程度上oracle无法识别内部查询的where子句中的t.ev_no。 我的查询如下
select t.ev_no,
t.ev_type,
t.ev_name,
(select ADD1 || ADD2 || ADD3 || CITY || STATE || ZIP
from (select CASE
WHEN ev_address1 is NULL then
''
ELSE
ev_address1 || '<br>'
END AS "ADD1",
CASE
WHEN ev_address2 is NULL then
''
ELSE
ev_address2 || '<br>'
END AS "ADD2",
CASE
WHEN ev_address3 is NULL then
''
ELSE
ev_address3 || '<br>'
END AS "ADD3",
CASE
WHEN ev_city is NULL then
''
ELSE
ev_city || '<br>'
END AS "CITY",
CASE
WHEN ev_state is NULL then
''
ELSE
ev_state || '<br>'
END AS "STATE",
CASE
WHEN ev_zip is NULL then
''
ELSE
ev_zip || '<br>'
END AS "ZIP"
from vendor where ev_no = t.ev_no)) as "ADDRESS",
t.ev_state,
t.ev_city,
t.payment_address,
t.ev_mwbe
from vendor t
where UPPER(ev_city) like :city
order by t.ev_state, t.ev_city, t.ev_name
请让我知道如何纠正错误。
谢谢
不记得确切的问题,但在oracle中,嵌套查询可以使用别名的范围有限。 要解决此问题,您可以使用WITH
子句重写。
WITH addressquery
AS (SELECT ev_no,
CASE
WHEN ev_address1 IS NULL THEN ''
ELSE ev_address1
|| '<br>'
END AS "ADD1",
CASE
WHEN ev_address2 IS NULL THEN ''
ELSE ev_address2
|| '<br>'
END AS "ADD2",
CASE
WHEN ev_address3 IS NULL THEN ''
ELSE ev_address3
|| '<br>'
END AS "ADD3",
CASE
WHEN ev_city IS NULL THEN ''
ELSE ev_city
|| '<br>'
END AS "CITY",
CASE
WHEN ev_state IS NULL THEN ''
ELSE ev_state
|| '<br>'
END AS "STATE",
CASE
WHEN ev_zip IS NULL THEN ''
ELSE ev_zip
|| '<br>'
END AS "ZIP"
FROM vendor)
SELECT t.ev_no,
t.ev_type,
t.ev_name,
a.add1 || a.add2 || a.add3 || a.city || a.state || a.zip AS "ADDRESS",
t.ev_state,
t.ev_city,
t.payment_address,
t.ev_mwbe
FROM vendor t
join addressquery a
ON t.ev_no = a.ev_no
WHERE 1 = 1
AND Upper(ev_city) LIKE :city
ORDER BY t.ev_state,
t.ev_city,
t.ev_name
所以我发现查询的嵌套导致了这个问题。 以下查询可以成功运行,但查询的可读性受到重大影响。
select t.ev_no,
t.ev_type,
t.ev_name,
(select CASE
WHEN ev_address1 is NULL then
''
ELSE
ev_address1 || '<br>'
END || CASE
WHEN ev_address2 is NULL then
''
ELSE
ev_address2 || '<br>'
END || CASE
WHEN ev_address3 is NULL then
''
ELSE
ev_address3 || '<br>'
END || CASE
WHEN ev_city is NULL then
''
ELSE
ev_city || '<br>'
END || CASE
WHEN ev_state is NULL then
''
ELSE
ev_state || '<br>'
END || CASE
WHEN ev_zip is NULL then
''
ELSE
ev_zip || '<br>'
END
from LMS_APPL.tlsev_external_vendor
where ev_no = t.ev_no) as "ADDRESS",
t.ev_state,
t.ev_city,
t.payment_address,
t.ev_mwbe
from vendor t
where UPPER(ev_city) like :city
order by t.ev_state, t.ev_city, t.ev_name
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