ORA-00904和表和列肯定存在

Question

Oracle的新手，但我不知道为什么这不起作用，我有点疯了。

我的查询工作正常，但只要我添加第三个连接语句，它就会给我以下错误消息：

这是我的查询。一切看起来都拼写正确，表格和列都存在。 TS_ORDER_SEC_SPEC目录中只有一条记录

错误：

Number: 904
ErrorMessage: ORA-00904: "OSS"."ORDER_ID": invalid identifier

SQL：

    select 
  o.from_crrncy as from_crrncy
, o.to_crrncy as to_crrncy
, o.trade_date as trade_date
, o.settle_date as settle_date
, o.order_id as order_id
, oa.exec_broker as oaexecbroker
, o.target_crrncy as given_ccy
From ts_order o
     inner join ts_order_alloc oa on oa.order_id = o.order_id
     inner join TS_ORDER_SEC_SPEC oss on oss.order_id = o.order_id

Answer 1

从你的图片看，你似乎有小写列;试试引用：

select 
  o.from_crrncy as from_crrncy
, o.to_crrncy as to_crrncy
, o.trade_date as trade_date
, o.settle_date as settle_date
, o.order_id as order_id
, oa.exec_broker as oaexecbroker
, o.target_crrncy as given_ccy
From ts_order o
     inner join ts_order_alloc oa on oa.order_id = o.order_id
     inner join TS_ORDER_SEC_SPEC oss on oss."order_id" = o.order_id

在Oracle中创建对象时要小心;看一个例子：

SQL> create table noCase ( col number);

Table created.

SQL> select col from noCase;

no rows selected

SQL> select COL from noCase;

no rows selected

SQL> create table lowerCase ( "col" number);

Table created.

SQL> select col from lowerCase;
select col from lowerCase
       *
ERROR at line 1:
ORA-00904: "COL": invalid identifier


SQL> select COL from lowerCase;
select COL from lowerCase
       *
ERROR at line 1:
ORA-00904: "COL": invalid identifier


SQL> select "col" from lowerCase;

no rows selected

SQL> select "COL" from lowerCase;
select "COL" from lowerCase
       *
ERROR at line 1:
ORA-00904: "COL": invalid identifier