I am preparing the review of the OCA. I'm confused below question

Two tables with very restrictive search criteria, index on the common column must be attached and response time needs to be improved. What type?

a. Merge

b. Nested Loop

c. Hash

d. cluster Join

I think it's Nester loop, but sometimes I see joining the Cluster as a response.

I think that this question of the sample is FAR too vague.

But the documentation:

A cluster is a schema object that contains the data for one or more tables, which have all one or more columns in common. Oracle database stores set all rows in all tables that share the same cluster key.

Tags: Database

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