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How to set two primary keys in one table in oracle?
set one primary key at table creation and another one is after creation of primary key.
3 Antworten
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You can add a unique constraint...even several...
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create table tablename (column1, column2 , primary key(column1,column2))
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One table can only have only one Primary Key, but can have more than 1 foreign key.
2 primary key is not necessary practically too.