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SQL In Oracle Interview Questions & Answers

Below we have listed all the SQL In Oracle Interview Questions and answers. Feel free to comment on any SQL In Oracle Interview Questions or answer by the comment feature available on the page.

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Find out nth highest salary from emp table
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Which is more faster - IN or EXISTS?
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Whet are the difference between primary key and foreign key?
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What is the maximum buffer size that can be specified using the DBMS_OUTPUT.ENABLE function?
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What is an UTL_FILE.What are different procedures and functions associated with it?
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Can the default values be assigned to actual parameters?
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What is difference between SUBSTR and INSTR?
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What is difference between a formal and an actual parameter?
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Difference between an implicit & an explicit cursor.
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What are various joins used while writing SUBQUERIES?
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What is difference between SQL and SQL*PLUS?
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Difference between procedure and function.
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Which datatype is used for storing graphics and images?
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What should be the return type for a cursor variable.Can we use a scalar data type as return type?
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What is the purpose of a cluster?
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Display the number value in Words?
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Difference between database triggers and form triggers?
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How will you delete duplicating rows from a base table?
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Differentiate between TRUNCATE and DELETE
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Can a primary key contain more than one columns?
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