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Hi,friends i created tables as above when i creating 'ORDERS' table the error will fir as "ORA-02270: no matching unique or primary key for this column-list".
can any body solve this issue.
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SQL and PL/SQL
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CONSTRAINT FK2_ORDERS FOREIGN KEY (ITEM_NUM) REFERENCES ITEM(ITEM_NUM));
You can't reference ITEM.ITEM_NUM because, as the exception says, there is 'no matching unique or primary key for this column'
The primary key on the item table contains two columns.
CONSTRAINT PK_ITEM PRIMARY KEY(ITEM_NUM,TYPE));