如何从 userb.table 添加外键到 usera.table？

Question

我是 Oracle 新手，我尝试将外键 "SupplyMGR"."SUPPLIES" 添加到 "OrderMGR"."USEDIN"。

但我收到以下错误

ALTER TABLE "SupplyMGR"."SUPPLIES" ADD CONSTRAINT OrderMGR_fk FOREIGN KEY (ORDERNO) REFERENCES "OrderMGR"."USEDIN"(ORDERNO)

Error report
ORA-00922: missing or invalid option
00922. 00000 - "missing or invalid option"
*Cause:
*Action:

代码：

ALTER TABLE "SupplyMGR"."SUPPLIES" 
    ADD CONSTRAINT OrderMGR_fk 
        FOREIGN KEY (ORDERNO) REFERENCES "OrderMGR"."USEDIN"(ORDERNO);

已创建所有表。 "SupplyMGR"."SUPPLIES"Table

+-----+--------------+---------------+-------------------+-----+-----+
| SID | SDESCRIPTION | AMOUNTINSTOCK | SEPTUSAGE         |STYPE|ORDERNO
+-----+--------------+---------------+-------------------+-----+-----+
|   1 | desc2        |             3 |                20 | 200 |
|   2 | desc1        |           300 |                10 |  30 |
+-----+--------------+---------------+-------------------+-----+-----+

"OrderMGR"."USEDIN"Table

+---------+--------------+----------+--------------+-------+---------+
| ORDERNO | SDESCRIPTION | SUPPLIES | QUANTITYUSED | STYPE | BIGJOBS |
+---------+--------------+----------+--------------+-------+---------+
|    9001 | desc2        |       20 |           10 | type1 | Bigjob1 |
|    9002 | desc1        |       30 |           20 | type2 | Bigjob2 |
+---------+--------------+----------+--------------+-------+---------+

请帮忙

Answer 1

好吧，有效。我没有你的用户，也没有 tables，所以我使用了我自己的用户（虽然经过了简化）。

第一个用户：

SQL> show user
USER is "MIKE"
SQL>
SQL> create table usedin (orderno number primary key);

Table created.

SQL> grant references on usedin to scott;

Grant succeeded.

SQL>

第二个用户（引用 table）：

SQL> connect scott/tiger
Connected.
SQL>
SQL> create table supplies
  2    (sid     number primary key,
  3     orderno number);

Table created.

SQL> alter table supplies add constraint ordermgr_fk foreign key (orderno)
  2  references mike.usedin (orderno);

Table altered.

SQL>

如何从 userb.table 添加外键到 usera.table？

How to add foreign key to a usera.table from a userb.table?

sql

oracle

oracle11g