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Exam Number:   PGCES-02
Exam Name : PostgreSQL CE 8 Silver
Number of questions:150 Q&As
Time allowed in minutes:90
Test language:English
Updated Time:Jan-13-2010

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3.PostgreSQL can use an index to access a table. Select two incorrect statements about indexes.
A.An index is created by 'CREATE INDEX', and deleted by 'DROP INDEX'.
B.By using an index effectively, searching and sorting performs faster.
C.There are B-tree, Hash, R-tree and GiST index types.
D.By creating an index, performance always improves.
E.Creating an unused index does not affect the performance of a database at all.
Answer E
4.Select two incorrect statements regarding 'DOMAIN'.
A.When defining a domain, you can add a default value and constraints to the original data.
B.Domain is a namespace existing between databases and objects such as tables.
C.A domain is created by 'CREATE DOMAIN'.
D.A domain can be used as a column type when defining a table.
E.To define a domain, both input and output functions are required.
Answer:B E
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