Explain raise_application_error.
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can i call procedure in package
Why do we use triggers?
What is difference between % ROWTYPE and TYPE RECORD ?
If the application is running very slow? At what points you need to go about the database in order to improve the performance?
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Explain the PL/SQL compilation process.
ex: take one schema in that t1,t2,.....tn tables and you don't no the table name also. write a procedure if enter columns name then display the maching columns .otherwise display the unmatch columns.
What are triggers, and when would you use them?
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Explain the rollback statement?
How did you export data from database to excel file.
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