What are the differences between primary key and unique key?
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Hi how Can I Add A Foreign key that references a table that has composit primary key ? example i had costumer table that has C_Id and SSN Both as PK and another table has C_Id that must refernece C_Id in Customers i done the usual way and got oracle error message about uniqeness any ideas plz
A table t is there.If you perform insert ,update and delete then the trigger will fire.What is the minimum no of trigger required for a table.
what is the exact definition for pointer?
What does ROLLBACK do ?
24. Display the order number for all orders whose average item cost is greater than the overall average item cost across all orders.
Can you tell me how to add new column in existing views?how?How is possible?
How to get the Installed Oracle Version Information ?
Explain what are clusters?
what is the syntax of UPDATE command?
hai, when to use char and varchar2....?
What are the database administrators utilities available?
How to drop an index?