How to retrieve 5th highest sal from emp table? Difference between clustering and mirroring Explain the significance of cluster table or non cluster table. How many types of trigger can be used in a table at a time? What are they? Purpose of using Nextval while creating the sequence. Difference between formula column and place holder. Explain how to see the report output in excel sheet in oracle applications. What are the types of calculated columns available? Explain them Explain how to run any oracle script file through shell script in UNIX. Explain how to update records of a table in oracle using where Exists clause. Explain how to make use of parameterized cursor in Oracle. Explain the use of Translate Function in Oracle. Describe the use of "for update of" in Oracle Cursor. What are the components of OEM? What is the difference between locks, latches, enqueues and semaphores?