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Oracle 1Z0-007 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Subqueries | 10% | - Single-row and multi-row subqueries - Using IN, ANY, ALL operators |
| Single-Row Functions | 18% | - Character, number, and date functions - Conversion functions (TO_CHAR, TO_NUMBER, TO_DATE) - Conditional expressions (NVL, DECODE) |
| Aggregating Data Using Group Functions | 13% | - Using COUNT, SUM, AVG, MAX, MIN - Filtering groups with HAVING - GROUP BY clause |
| Creating and Managing Tables | 9% | - CREATE, ALTER, DROP, RENAME tables - Managing indexes, sequences, synonyms, views - Data types and constraints |
| Restricting and Sorting Data | 12% | - Using substitution variables - Limiting rows with WHERE clause - Sorting results with ORDER BY |
| Manipulating Data | 8% | - INSERT, UPDATE, DELETE statements - Transaction control (COMMIT, ROLLBACK, SAVEPOINT) |
| Writing Basic SQL SELECT Statements | 15% | - Executing basic SELECT statements - Capabilities of SQL SELECT statements - SQL vs iSQL*Plus commands |
| 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:
1. Evaluate these two SQL statements:
SELECT last_name, salary, hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary, hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them?
A) The second statement returns a syntax error.
B) The two statements produce identical results.
C) There is no need to specify DESC because the results are sorted in descending order by default.
D) The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.
2. Examine the structure of the STUDENTS table:
You need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999.
Which SQL statement accomplishes this task?
A) SELECT student_ id, marks, ROWNUM "Rank"
FROM students
WHERE ROWNUM <= 10
AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99'
AND course_id = 'INT_SQL'
ORDER BY marks DESC;
B) SELECT student_id, marks, ROWNUM "Rank"
FROM (SELECT student_id, marks
FROM students
ORDER BY marks DESC)
WHERE ROWNUM <= 10
AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99'
AND course_id = 'INT_SQL';
C) SELECT student_id, marks, ROWNUM "Rank"
FROM (SELECT student_id, marks
FROM students
WHERE ROWNUM <= 10
AND finish_date BETWEEN '01-JAN-99' AND
'31-DEC-99'
AND course_id = 'INT_SQL'
ORDER BY marks DESC);
D) SELECT student_id, marks, ROWID "Rank"
FROM students
WHERE ROWID <= 10
AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99'
AND course_id = 'INT_SQL'
ORDER BY marks;
3. Evaluate the SQL statement:
SELECT ROUND(45.953, -1), TRUNC(45.936, 2)
FROM dual;
Which values are displayed?
A) 50 and 45.9
B) 46 and 45
C) 50 and 45.93
D) 45 and 45.93
E) 46 and 45.93
F) 45.95 and 45.93
4. Which object privileges can be granted on a view?
A) DELETE, INSERT,SELECT
B) ALTER, DELETE, INSERT, SELECT
C) none
D) DELETE, INSERT, SELECT, UPDATE
5. Which four statements correctly describe functions that are available in SQL? (Choose four)
A) TRIM trims the heading of trailing characters (or both) from a character string.
B) INSTR returns the numeric position of a named character.
C) NVL2 returns the first non-null expression in the expression list.
D) TRUNCATE rounds the column, expression, or value to n decimal places.
E) NULLIF compares twp expressions and returns null if they are equal, or the first expression if they are not equal.
F) NVL compares two expressions and returns null if they are equal, or the first expression of they are not equal.
G) DECODE translates an expression after comparing it to each search value.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: B | Question # 3 Answer: C | Question # 4 Answer: D | Question # 5 Answer: A,B,E,G |
