ORACLE INTERVIEW QUESTIONS & ANSWERS
6. |
Define Query? |
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- A query is a read–only transaction against a database.
- A query is generated using the SELECT statement.
- Users generally distinguish between queries and other transaction types because a query
does not the change data in the database.
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7. |
What is the difference between a relation and a relationship? |
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The difference between a relation and a relationship is that a relation is another name for a table, whereas a relationship is a way to correlate, or join, two or more tables. |
8. |
Name two new features of Oracle8? |
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New features of Oracle8 include partitioned tables, index-only tables, and improved parallelism. |
9. |
What are the three types of DML (Data Manipulation Language) statements? |
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There are three types of DML statements are :- INSERT
- UPDATE
- DELETE
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Posted by vedant. (Oct 22, 2013) |
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MERGE
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10. |
What is a log group? |
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A log file group is a set of identical redo log files. This provides redundancy to protect against media failure. |