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Exam Code: PGCES-02
Exam Name: PostgreSQL CE 8 Silver
One year free update, No help, Full refund!
PGCES-02 Real Questions Total Q&A: 145 Questions and Answers
Last Update: 2014-05-12

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NO.1 Select two correct descriptions about views.
A.A view is created by 'DECLARE VIEW', and deleted by 'DROP VIEW'.
B.A view is a virtual table which does not exist.
C.A view is created to simplify complicated queries.
D.You can create a view with the same name as already existing tables.
E.A view only exists while the postmaster is running, and is deleted when the postmaster stops.
Answer:B C

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NO.2 Select two suitable statements about sequences.
A.A sequence always returns a 4-byte INTEGER type value, so the maximum value is 2147483647.
B.A sequence is defined by 'CREATE SEQUENCE', and deleted by 'DROP SEQUENCE'.
C.Although the "nextval" function is called during a transaction, it will have no effect if that transaction is
rolled back.
D.A sequence always generates 0 or consecutive positive numbers.
E.A sequence number can be set by calling the "setval" function.
Answer:B E

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NO.3 Four SQL statements were executed in the following order. CREATE TABLE foo (bar INT); ALTER
TABLE foo ALTER bar TYPE BIGINT; ALTER TABLE foo ADD baz VARCHAR(5); ALTER TABLE foo
DROP bar; Select two SQL statements that generate an error when executed.
A.INSERT INTO foo VALUES ('12345');
B.INSERT INTO foo VALUES ('5000000000');
C.INSERT INTO foo VALUES ('ABC');
D.INSERT INTO foo VALUES (2000000000);
E.INSERT INTO foo VALUES (NULL);
Answer:B D

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NO.4 Select two suitable statements regarding creating a new table.
A.There is no upper limit to the number of columns in a table.
B.A newly created table is empty and has 0 rows.
C.You can only use alphabetic characters for a table name.
D.The row name must be within 16 characters.
E.The SQL 'CREATE TABLE' statement is used to create a new table.
Answer:B E

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NO.5 Select the most suitable statement about PostgreSQL from below.
A.PostgreSQL is a card-type database management system.
B.PostgreSQL is a hierarchical database management system.
C.PostgreSQL is a network-type database management system.
D.PostgreSQL is an XML database management system.
E.PostgreSQL is a relational database management system.
Answer:E

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NO.6 The table "score" is defined as follows: gid | score -----+------ 1 | 70 1 | 60 2 | 100 3 | 80 3 | 50 The
following query was executed. Select the number of rows in the result. SELECT gid, max(score) FROM
score GROUP BY gid HAVING max(score) > 60;
A.1 row
B.2 rows
C.3 rows
D.4 rows
E.5 rows
Answer:C

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NO.7 Select two incorrect statements concerning PostgreSQL license.
A.It can be used freely.
B.It can be duplicated freely.
C.It can be freely redistributed.
D.Developers are responsible for its maintenance support.
E.Developers are only responsible for handling its crucial faults.
Answer:D E

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NO.8 Select two suitable statements regarding the following SQL statement: CREATE TRIGGER trigger_1
AFTER UPDATE ON sales FOR EACH ROW EXECUTE PROCEDURE write_log();
A.It is defining a trigger "trigger_1".
B.Every time 'UPDATE' is executed on the "sales" table, the "write_log" function is called once.
C.The "write_log" function is called before 'UPDATE' takes place.
D.'UPDATE' is not executed if "write_log" returns NULL.
E.'DROP TRIGGER trigger_1 ON sales;' deletes the defined trigger.
Answer:A E

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