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Oracle 1Z0-007 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Manipulating Data | 8% | - INSERT, UPDATE, DELETE statements - Transaction control (COMMIT, ROLLBACK, SAVEPOINT) |
| Creating and Managing Tables | 9% | - Data types and constraints - Managing indexes, sequences, synonyms, views - CREATE, ALTER, DROP, RENAME tables |
| Restricting and Sorting Data | 12% | - Limiting rows with WHERE clause - Sorting results with ORDER BY - Using substitution variables |
| Single-Row Functions | 18% | - Conditional expressions (NVL, DECODE) - Conversion functions (TO_CHAR, TO_NUMBER, TO_DATE) - Character, number, and date functions |
| Displaying Data from Multiple Tables | 15% | - ANSI/ISO SQL99 joins - Equijoins and non-equijoins - Outer joins and self-joins |
| Subqueries | 10% | - Single-row and multi-row subqueries - Using IN, ANY, ALL operators |
| Aggregating Data Using Group Functions | 13% | - Using COUNT, SUM, AVG, MAX, MIN - Filtering groups with HAVING - GROUP BY clause |
| Writing Basic SQL SELECT Statements | 15% | - Executing basic SELECT statements - Capabilities of SQL SELECT statements - SQL vs iSQL*Plus commands |
Oracle Introduction to Oracle9i: SQL Sample Questions:
Which two statements are true about WHERE and HAVING clauses? (Choose two)
- A. A WHERE clause CANNOT be used in a query of the query uses a HAVING clause.
- B. A WHERE clause can be used to restrict both rows and groups.
- C. A WHERE clause can be used to restrict rows only.
- D. A HAVING clause CANNOT be used in subqueries.
- E. A HAVING clause can be used to restrict groups only.
- F. A HAVING clause can be used to restrict both rows and groups.
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Which three SELECT statements displays 2000 in the format "$2,000.00"? (Choose three)
- A. SELECT TO CHAR (2000, '$2,000.00') FROM dual;
- B. SELECT TO CHAR (2000, '$9,999.99') FROM dual;
- C. SELECT TO CHAR (2000, '$9,999.00') FROM dual;
- D. SELECT TO CHAR (2000, '$N,NNN.NN') FROM dual;
- E. SELECT TO CHAR (2000, '$0,000.00') FROM dual;
- F. SELECT TO CHAR (2000,'$#,###.##') FROM dual;
Explanation: Only visible for TestKingFree members. You can sign-up / login (it's free).
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.
Which statement accomplishes this task?
- A. ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);
- B. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;
- C. ALTER TABLE students ADD PRIMARY KEY student_id;
- D. ALTER TABLE studentsMODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
- E. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
Explanation: Only visible for TestKingFree members. You can sign-up / login (it's free).
Evaluate this SQL statement:
SELECT e.employee_id, (.15* e.salary) + (.5 * e.commission_pct)
+ (s.sales amount * (.35 * e.bonus)) AS CALC_VALUE FROM employees e, sales s WHERE e.employee_id = s.emp_id;
What will happen if you remove all the parentheses from the calculation?
- A. The value displayed in the CALC_VALUE column will be higher.
- B. There will be no difference in the value displayed in the CALC_VALUE column.
- C. An error will be reported.
- D. The value displayed in the CALC_VALUE column will be lower.
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The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table.
As a user of the database, you created a table called HR in your schema. What happens when you execute this query?
SELECT *
FROM HR;
- A. You obtain the results retrieved from the HR table that belongs to your schema.
- B. You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product.
- C. You obtain the results retrieved from the public synonym HR created by the database administrator.
- D. You get an error message because you cannot retrieve from a table that has the same name as a public synonym.
- E. You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.
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