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Oracle 1Z0-007 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Writing Basic SQL SELECT Statements | 15% | - Executing basic SELECT statements - SQL vs iSQL*Plus commands - Capabilities of SQL SELECT statements |
| Topic 2: Aggregating Data Using Group Functions | 13% | - Using COUNT, SUM, AVG, MAX, MIN - GROUP BY clause - Filtering groups with HAVING |
| Topic 3: Creating and Managing Tables | 9% | - Data types and constraints - Managing indexes, sequences, synonyms, views - CREATE, ALTER, DROP, RENAME tables |
| Topic 4: Subqueries | 10% | - Single-row and multi-row subqueries - Using IN, ANY, ALL operators |
| Topic 5: Manipulating Data | 8% | - Transaction control (COMMIT, ROLLBACK, SAVEPOINT) - INSERT, UPDATE, DELETE statements |
| Topic 6: Single-Row Functions | 18% | - Conversion functions (TO_CHAR, TO_NUMBER, TO_DATE) - Conditional expressions (NVL, DECODE) - Character, number, and date functions |
| Topic 7: Restricting and Sorting Data | 12% | - Using substitution variables - Sorting results with ORDER BY - Limiting rows with WHERE clause |
| Topic 8: Displaying Data from Multiple Tables | 15% | - ANSI/ISO SQL99 joins - Outer joins and self-joins - Equijoins and non-equijoins |
Oracle Introduction to Oracle9i: SQL Sample Questions:
You need to produce a report for mailing labels for all customers. The mailing label must have only the customer name and address. The CUSTOMERS table has these columns:
Which SELECT statement accomplishes this task?
- A. SELECT name, address FROM customers;
- B. SELECT cust_id, cust_name, cust_address, cust_phone FROM customers;
- C. SELECT id, name, address, phone FROM customers;
- D. SELECT* FROM customers;
- E. SELECT cust_name, cust_address FROM customers;
Correct Answer: E π³οΈ
Explanation: Only visible for Exam4Free members. You can sign-up / login (it's free).
Exhibit
The COMMISSION column shows the monthly commission earned by the employee.
Which two tasks would require subqueries or joins in order to be performed in a single step? (Choose two.)
- A. finding the total commission earned by the employees in department 10
- B. listing the employees whose annual commission is more than 6000
- C. listing the employees who do not earn commission and who are working for department 20 in descending order of the employee ID
- D. listing the departments whose average commission is more that 600
- E. finding the number of employees who earn a commission that is higher than the average commission of the company
- F. listing the employees who earn the same amount of commission as employee 3
Correct Answer: E,F π³οΈ
Evaluate this SQL statement:
SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME
FROM EMP e, DEPARTMENT d
WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID;
In the statement, which capabilities of a SELECT statement are performed?
- A. Selection, projection, join
- B. Selection, intersection, join
- C. Intersection, projection, join
- D. Difference, projection, product
- E. Difference, projection, join
Correct Answer: A π³οΈ
Explanation: Only visible for Exam4Free members. You can sign-up / login (it's free).
Which SELECT statement should you use to extract the year from the system date and display it in the format "1998"?
- A. SELECT TO_CHAR(SYSDATE,'yyyy') FROM dual;
- B. SELECT DECODE(SUBSTR(SYSDATE, 8), 'YYYY') FROM dual;
- C. SELECT DECODE(SUBSTR(SYSDATE, 8), 'year') FROM dual;
- D. SELECT TO_CHAR(SUBSTR(SYSDATE, 8,2),'yyyy') FROM dual;
- E. SELECT TO_DATE(SYSDATE,'yyyy') FROM dual;
Correct Answer: A π³οΈ
Explanation: Only visible for Exam4Free members. You can sign-up / login (it's free).
In which scenario would index be most useful?
- A. The indexed column contains a wide range of values.
- B. The indexed columns are used in the FROM clause.
- C. The indexed columns are part of an expression.
- D. The indexed column is declared as NOT NULL.
Correct Answer: A π³οΈ
Explanation: Only visible for Exam4Free members. You can sign-up / login (it's free).
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