无法加入两个Oracle表 [英] Unable to join two oracle tables

问题描述

我有2张桌子. 第一个表SEC_SEAL_LOG的列:

i have 2 tables. First table SEC_SEAL_LOG with columns:

DATA_ADD,
DATA_AREA,
SEAL_NUMBER,
DATA_SEALING,
DATA_UNPLUG,
SORRUPTED.
SEC_WRITING_OFF_SEALS 

带有列的第二个表:

DATA, SEAL.

我想将这两个表放在一起，但是我不明白哪里出了错误，感谢您的帮助.

I want to put these 2 tables together, but I cannot understand where I have the error, I will be grateful for your help.

select DATA_ADD,
       DATA_AREA,
       SEAL_NUMBER,
       DATA_SEALING,
       DATA_UNPLUG,
       СORRUPTED,
       Data
from SEC_SEAL_LOG,SEC_WRITING_OFF_SEALS
where  (data_area = (select data_area 
                     from SEC_USERS_LIST 
                     where login = LOWER(:APP_USER) 
                     and SEAL_NUMBER = SEAL 
                    )
            or 20 >= (select u.role 
                      from SEC_users_list u 
                      where u.login = lower(:APP_USER)
                    )
        ) 
and СORRUPTED = 'Так'  
and SEAL_NUMBER = SEAL
ORDER BY  data_add DESC

我会收到此错误

ORA-20999:无法解析SQL查询！

ORA-06550:第7行，第4列:ORA-00918:列定义不明确

ORA-20999: Failed to parse SQL query!

ORA-06550: line 7, column 4: ORA-00918: column ambiguously defined

推荐答案

当一个列名称存在于多个表中而您未能指定哪个表时，将发生错误Column Ambiguously Defined.

The error Column Ambiguously Defined occurs when a column name is present in more than one table, and you have failed to specify which table.

您正在执行以下操作:and SEAL_NUMBER = SEAL(您有两次).

You are doing that in this line: and SEAL_NUMBER = SEAL (which you have twice).

您要从哪个表中比较该SEAL值?

From which table to you want to compare that SEAL value?

将其写为SEC_SEAL_LOG.SEAL或SEC_WRITING_OFF_SEALS.SEAL或任何试图与之比较的表名，它将消除Column Ambiguously Defined错误.

Write it as SEC_SEAL_LOG.SEAL or SEC_WRITING_OFF_SEALS.SEAL or whatever table name you are trying to compare this value from, and it will get rid of the Column Ambiguously Defined error.

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