Oracle 面试题与答案
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问题 21. What are the type of Synonyms?
There are two types of Synonyms Private and Public.
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问题 22. What is a Redo Log?
The set of Redo Log files YSDATE,UID,USER or USERENV SQL functions, or the pseudo columns LEVEL or ROWNUM.
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问题 23. What is an Index Segment?
Each Index has an Index segment that stores all of its data.
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问题 24. What are the different type of Segments?
Data Segment, Index Segment, Rollback Segment and Temporary Segment.
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问题 25. What are Clusters?
Clusters are groups of one or more tables physically stores together to share common columns and are often used together.
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