12 Questions
What is the purpose of indexes in Oracle databases?
Automatically update indexes after new data is inserted
How does clustering help in boosting performance of join queries?
By storing related data together on the same disk page
What is a cluster column in Oracle databases?
A common column with the same data type and size in cluster tables
Which statement about cluster indexes is true?
Cluster indexes require additional storage space
How are indexes used by Oracle databases in SQL statements?
Indexes are used for all SQL statements to find records
What happens to index usage if columns referenced in the WHERE clause have indexes?
Oracle automatically uses those indexes when appropriate
What is the first step in creating clustered tables?
Create a Cluster
What is stored in an index segment in Oracle?
Cluster Index
What happens if a cluster index is dropped?
Data in the cluster remains but cannot be accessed
Can existing tables be moved into a cluster?
No, tables have to be explicitly created under the cluster
In a cluster index, how many entries are there per cluster key value?
One entry per cluster key value
What is required to access data in cluster tables?
A Cluster Index
Explore how Oracle handles indexes separately from data, automatically updates them, and utilizes them for efficient data retrieval. Learn about clustering as a method of storing data together from different tables in Oracle.
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