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Oracle 1Z0-007 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Restricting and Sorting Data | 12% | - Sorting results with ORDER BY - Limiting rows with WHERE clause - Using substitution variables |
| Topic 2: Aggregating Data Using Group Functions | 13% | - Filtering groups with HAVING - Using COUNT, SUM, AVG, MAX, MIN - GROUP BY clause |
| Topic 3: Single-Row Functions | 18% | - Conversion functions (TO_CHAR, TO_NUMBER, TO_DATE) - Conditional expressions (NVL, DECODE) - Character, number, and date functions |
| Topic 4: Creating and Managing Tables | 9% | - CREATE, ALTER, DROP, RENAME tables - Managing indexes, sequences, synonyms, views - Data types and constraints |
| Topic 5: Displaying Data from Multiple Tables | 15% | - Outer joins and self-joins - ANSI/ISO SQL99 joins - Equijoins and non-equijoins |
| Topic 6: Writing Basic SQL SELECT Statements | 15% | - Capabilities of SQL SELECT statements - Executing basic SELECT statements - SQL vs iSQL*Plus commands |
| Topic 7: Manipulating Data | 8% | - INSERT, UPDATE, DELETE statements - Transaction control (COMMIT, ROLLBACK, SAVEPOINT) |
| Topic 8: Subqueries | 10% | - Single-row and multi-row subqueries - Using IN, ANY, ALL operators |
Oracle Introduction to Oracle9i: SQL Sample Questions:
Examine the statement:
Create synonym emp for hr.employees;
What happens when you issue the statement?
- A. An error is generated.
- B. You create an alternative name for the employees table in the HR schema in your own schema.
- C. You will have two identical tables in the HR schema with different names.
- D. You create a table called employees in the HR schema based on you EMP table.
Correct Answer: B 🗳️
In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement?
- A. Before the FROM clause
- B. After the WHERE clause
- C. Immediately after the SELECT clause
- D. After the ORDER BY clause
- E. Before the WHERE clause
Correct Answer: B 🗳️
Explanation: Only visible for RealVCE members. You can sign-up / login (it's free).
Which four are correct guidelines for naming database tables? (Choose four)
- A. Must be 1-30 characters long.
- B. Must contain only A-Z, a-z, 0-9, _, $, and #.
- C. Must contain only A-Z, a-z, 0-+, _, *, and #.
- D. Must begin with either a number or a letter.
- E. Should not be an Oracle Server reserved word.
- F. Must begin with a letter.
Correct Answer: A,B,E,F 🗳️
Explanation: Only visible for RealVCE members. You can sign-up / login (it's free).
Which statement describes the ROWID data type?
- A. Character data up to 4 gigabytes.
- B. Binary data stored in an external file, up to 4 gigabytes.
- C. A hexadecimal string representing the unique address of a row in its table.
- D. Raw binary data of variable length up to 2 gigabytes.
- E. Binary data up to 4 gigabytes.
Correct Answer: C 🗳️
Explanation: Only visible for RealVCE members. You can sign-up / login (it's free).
You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".
What happens when the main query is executed?
- A. The main query executes with all the values returned by the subquery.
- B. You cannot define a multiple-row subquery in the WHERE clause of a SQL query.
- C. The main query executes with the last value returned by the subquery.
- D. The main query fails because the multiple-row subquery cannot be used with the comparison operator.
- E. The main query executes with the first value returned by the subquery.
Correct Answer: D 🗳️
Explanation: Only visible for RealVCE members. You can sign-up / login (it's free).
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