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What is the difference between truncate and delete? Why is one faster?


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More Oracle DBA (Database Administration) Interview Questions

Explain dual table. Is any data internally stored in dual table. Lot of users is accessing select sysdate from dual and they getting some millisecond differences. If we execute select sysdate from emp; what error will we get. Why?

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What is end user in database?

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What is mutated trigger? In single user mode we got mutated error, as a dba how you will resolve it?

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You have installed oracle and you are now setting up the actual instance. You have been waiting an hour for the initialization script to finish, what should you check first to determine if there is a problem?

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