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Oracle 1Z0-007 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Displaying Data from Multiple Tables | 15% | - Equijoins and non-equijoins - Outer joins and self-joins - ANSI/ISO SQL99 joins |
| Manipulating Data | 8% | - Transaction control (COMMIT, ROLLBACK, SAVEPOINT) - INSERT, UPDATE, DELETE statements |
| Writing Basic SQL SELECT Statements | 15% | - Capabilities of SQL SELECT statements - SQL vs iSQL*Plus commands - Executing basic SELECT statements |
| Single-Row Functions | 18% | - Conditional expressions (NVL, DECODE) - Conversion functions (TO_CHAR, TO_NUMBER, TO_DATE) - Character, number, and date functions |
| Subqueries | 10% | - Single-row and multi-row subqueries - Using IN, ANY, ALL operators |
| Restricting and Sorting Data | 12% | - Limiting rows with WHERE clause - Sorting results with ORDER BY - Using substitution variables |
| Creating and Managing Tables | 9% | - Managing indexes, sequences, synonyms, views - CREATE, ALTER, DROP, RENAME tables - Data types and constraints |
| Aggregating Data Using Group Functions | 13% | - Using COUNT, SUM, AVG, MAX, MIN - Filtering groups with HAVING - GROUP BY clause |
Oracle Introduction to Oracle9i: SQL Sample Questions:
Which constraint can be defined only at the column level?
- A. CHECK
- B. PRIMARY KEY
- C. FOREIGN KEY
- D. NOT NULL
- E. UNIQUE
Correct Answer: D 🗳️
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Which two statements about subqueries are true? (Choose two.)
- A. A single row subquery can retrieve data from only one table.
- B. A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
- C. A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.
- D. A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
- E. A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.
- F. A single row subquery can retrieve data from more than one table.
Correct Answer: B,F 🗳️
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Which is an /SQL*Plus command?
- A. UPDATE
- B. INSERT
- C. SELECT
- D. DELETE
- E. DESCRIBE
- F. RENAME
Correct Answer: E 🗳️
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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 cust_id, cust_name, cust_address, cust_phone FROM customers;
- B. SELECT* FROM customers;
- C. SELECT cust_name, cust_address FROM customers;
- D. SELECT name, address FROM customers;
- E. SELECT id, name, address, phone FROM customers;
Correct Answer: C 🗳️
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Exhibit
Evaluate this SQL statement: SELECT cust_id, ord_total FROM orders WHERE ord_total > ANY (SELECT ord_total FROM orders WHERE cust_id IN (SELECT cust_id FROM customers WHERE city LIKE 'New York'));
What is the result when the above query is executed?
- A. Option D
- B. Option F
- C. Option B
- D. Option C
- E. Option E
- F. Option A
Correct Answer: F 🗳️
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