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Oracle 1Z0-007 real answers - Introduction to Oracle9i: SQL

1Z0-007
  • Exam Code: 1Z0-007
  • Exam Name: Introduction to Oracle9i: SQL
  • Updated: Oct 17, 2025
  • Q & A: 110 Questions and Answers
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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. What is true about sequences?

A) The maximum value of descending sequence defaults to 1.
B) The start value of the sequence is always 1.
C) The minimum value of an ascending sequence defaults to 1.
D) A sequence always increments by 1.


2. Exhibit:

Examine the data in the EMPLOYEES table.
Examine the subquery:
SELECT last_name FROM employees WHERE salary IN (SELECT MAX(salary) FROM employees GROUP BY department_id);
Which statement is true?

A) The SELECT statement does not work because the GROUP BY clause should be in the
main query and not in the subquery.
B) The SELECT statement is syntactically accurate.
C) The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.
D) The SELECT statement does not work because there is no HAVING clause.


3. Which SQL statement accepts user input for the columns to be displayed, the table name, and WHERE condition?

A) SELECT &1, "&2"
FROM &3
WHERE last_name = '&4';
B) SELECT &1, '&2'
FROM EMP
WHERE last_name = '&4';
C) SELECT &1, &2
FROM &3
WHERE last_name = '&4';
D) SELECT &1, '&2'
FROM &3
WHERE '&last_name = '&4' ';


4. Which three statements about subqueries are true? (Choose three)

A) A single row subquery can retrieve only one column and one row.
B) A single row subquery can use the IN operator.
C) A single row subquery can retrieve only one row but many columns.
D) A multiple row subquery can use the "=" operator.
E) A multiple row subquery can be compared by using the ">" operator.
F) A multiple row subquery can retrieve multiple rows and multiple columns.


5. The CUSTOMERS table has these columns:
CUSTOMER_ID NUMBER(4) NOT NULL
CUSTOMER_NAME VARCHAR2(100) NOT NULL
CUSTOMER_ADDRESS VARCHAR2(150)
CUSTOMER_PHONE VARCHAR2(20)
You need to produce output that states "Dear Customer customer_name, ".
The customer_name data values come from the CUSTOMER_NAME column in the CUSTOMERS table.
Which statement produces this output?

A) SELECT 'Dear Customer ' || customer_name || ',' FROM customers;
B) SELECT dear customer, customer_name, FROM customers;
C) SELECT 'Dear Customer ' || customer_name ',' FROM customers;
D) SELECT 'Dear Customer ' || customer_name || ',' || FROM customers;
E) SELECT "Dear Customer", customer_name || ',' FROM customers;
F) SELECT "Dear Customer " || customer_name || "," FROM customers;


Solutions:

Question # 1
Answer: C
Question # 2
Answer: B
Question # 3
Answer: C
Question # 4
Answer: B,C,F
Question # 5
Answer: A

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