从Oracle中的另一个架构中选择数据 [英] SELECT data from another schema in oracle

问题描述

我想执行一个查询，该查询从与数据库连接中指定的模式不同的模式中选择数据(相同的Oracle服务器，相同的数据库，不同的模式)

I want to execute a query that selects data from a different schema than the one specified in the DB connection (same Oracle server, same database, different schema)

我有一个与Oracle服务器通信的python应用程序.它打开与数据库(服务器/架构)A的连接，并对数据库中的表执行选择查询.

I have an python app talking to an Oracle server. It opens a connection to database (server/schema) A, and executes select queries to tables inside that database.

我尝试了以下方法:

select .... 
from pct.pi_int, pct.pi_ma, pct.pi_es
where ...

但是我得到了

ORA-00942: table or view does not exist

我也尝试用方括号括起模式名称:

I've also tried surrounding the schema name with brackets:

from [PCT].pi_int, [PCT].pi_ma, [PCAT].pi_es

我得到:

ORA-00903: invalid table name

查询是从Django应用程序内部使用cx_Oracle python模块执行的.

The queries are executed using the cx_Oracle python module from inside a Django app.

可以做到这一点还是我应该建立新的数据库连接?

Can this be done or should I make a new db connection?

推荐答案

您用来连接到数据库的用户(在此示例中为用户 A )是否具有 SELECT 访问 PCT 模式中的对象?假设 A 没有此访问权限，您将收到表或视图不存在"错误.

Does the user that you are using to connect to the database (user A in this example) have SELECT access on the objects in the PCT schema? Assuming that A does not have this access, you would get the "table or view does not exist" error.

最有可能的是，您需要DBA授予用户 A 对您所需的 PCT 模式中的任何表的访问权限.像

Most likely, you need your DBA to grant user A access to whatever tables in the PCT schema that you need. Something like

GRANT SELECT ON pct.pi_int
   TO a;

完成后，您应该能够使用语法 pct.pi_int 来引用 PCT 模式中的对象，如您最初在问题中所展示的那样.方括号语法方法无效.

Once that is done, you should be able to refer to the objects in the PCT schema using the syntax pct.pi_int as you demonstrated initially in your question. The bracket syntax approach will not work.

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