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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Top N analysis requires _____ and _____. (Choose two.)

A) only an inline view
B) the use of rowid
C) an ORDER BY clause
D) an inline view and an outer query
E) a GROUP BY clause

2. The EMPLOYEES table has these columns:
LAST NAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE
Management wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement:
ALTER TABLE EMPLOYEES MODIFY (SALARY DEFAULT 5000);
What is true about your ALTER statement?

A) A change to the DEFAULT value affects only subsequent insertions to the table.
B) All the rows that have a NULL value for the SALARY column will be updated with the value 5000.
C) Column definitions cannot be altered to add DEFAULT values.
D) Column definitions cannot be altered at add DEFAULT values for columns with a NUMBER data type.

3. What is true about joining tables through an equijoin?

A) You can join a maximum of two tables through an equijoin.
B) You can join a maximum of two columns through an equijoin.
C) You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.
D) You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.
E) To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.

4. The DBA issues this SQL command:
CREATE USER scott IDENTIFIED by tiger;
What privileges does the user Scott have at this point?

A) only the CONNECT privilege
B) no privileges
C) only the SELECT privilege
D) all the privileges of a default user

5. Which two tasks can your perform by using the TO_CHAR function? (Choose two)

A) Convert 10 to '10'
B) Convert a date to a character expression
C) Convert 'TEN' to 10
D) Convert a character expression to a date
E) Convert 10 to 'TEN'
F) Convert '10' to 10

Solutions: