PGCES-02 Questions and Answers

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PostgreSQL CE 8 Silver: PGCES-02

Rating: 4.5

Vendor: PostgreSQL-CE

Certifications: PostgreSQL-CE-Certifications

Exam Name: PostgreSQL CE 8 Silver

Exam Code: PGCES-02

Total Questions: 142 Q&As

Last Updated:

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PGCES-02 Online Practice Questions and Answers

Questions 1

The table "custom" is defined below. The "id" column and "introducer" column are of INTEGER type, and the "email" column is of TEXT type. id | email | introducer ----+-----------------+-----------2 | [email protected] | 1 3 | [email protected] | 2 4 | [email protected] | 2 Three SQL statements were executed in the following order: INSERT INTO custom SELECT max(id) + 1, '[email protected]', 4 FROM custom; UPDATE custom SET introducer = 999 WHERE email = '[email protected]'; DELETE FROM custom WHERE introducer NOT IN (SELECT id FROM custom); Select the number of rows in the "custom" table after the execution.

A. 0 rows

B. 1 row

C. 2 rows

D. 3 rows

E. 4 rows

Show Answer
Questions 2

Choose the most suitable statement about user management of PostgreSQL. Note: the version of PostgreSQL is 8.0.

A. Usernames not registered in the operating system cannot be registered as PostgreSQL users.

B. To create a new user for PostgreSQL, the "newuser" command is used.

C. PostgreSQL cannot be in a state where multiple users exist at the same time.

D. If you create a user that has permission to create other users, that user will become a superuser that is not subject to any access restriction checks.

E. To delete an existing user for PostgreSQL, "deleteuser" command is used.

Show Answer
Questions 3

The "sample" table consists of the following data:

How many rows are returned by executing the following SQL statement? SELECT i FROM sample

GROUP BY i HAVING count(*) = 2;

A. 0 rows

B. 1 row

C. 2 rows

D. 3 rows

E. 4 rows

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