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Oracle 1Z0-007 Exam Syllabus Topics:

Oracle Introduction to Oracle9i: SQL Sample Questions:

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

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

2. Exhibit

Examine the data in the EMPLOYEES and DEPARTMENTS tables.
You want to retrieve all employees' last names, along with their manager's last names and their department names. Which query would you use?

A) SELECT e.last_name, m.last_name, department_name
FROM employees e
RIGHT OUTER JOIN employees m on ( e.manager_id = m.employee_id)
RIGHT OUTER JOIN departments d ON (e.department_id = d.department_id)
B) SELECT last_name, manager_id, department_name
FROM employees e
JOIN departments d ON (e.department_id = d.department_id) ;
C) SELECT e.last_name, m.last_name, department_name
FROM employees e
LEFT OUTER JOIN employees m on ( e.managaer_id = m.employee_id)
LEFT OUTER JOIN departments d ON (e.department_id = d.department_id);
D) SELECT e.last_name, m.last_name, department_name
FROM employees e
LEFT OUTER JOIN employees m on ( e.manager_id = m.employee_id)
RIGT OUTER JOIN departments d ON (e.department_id = d.department_id);
E) SELECT e.last_name, m.last_name, department_name
FROM employees e
RIGT OUTER JOIN employees m on ( e.manager_id = m.employee_id)
LEFT OUTER JOIN departments d ON (e.department_id = d.department_id);
F) SELECT last_name, manager_id, department_name
FROM employees e
FULL OUTER JOIN departments d ON (e.department_id = d.department_id);

3. In which scenario would index be most useful?

A) The indexed columns are used in the FROM clause.
B) The indexed columns are part of an expression.
C) The indexed column is declared as NOT NULL.
D) The indexed column contains a wide range of values.

4. Which two are true about aggregate functions? (Choose two.)

A) You can use aggregate functions only in the column list of the SELECT clause and in the WHERE clause of a SELECT statement.
B) You can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.
C) You can use aggregate functions on a table, only by grouping the whole table as one single group.
D) You cannot group the rows of a table by more than one column while using aggregate functions.
E) You can use aggregate functions in any clause of a SELECT statement.
F) You can pass column names, expressions, constants, or functions as parameters to an aggregate function.

5. In which case would you use a FULL OUTER JOIN?

A) You want all matched and unmatched data from only one table.
B) You want all unmatched data from one table.
C) One of the tables has more data than the other.
D) You want all matched data from both tables.
E) Both tables have NULL values.
F) You want all unmatched data from both tables.

Solutions: