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| Section | Objectives |
|---|---|
| Using DDL Statements | - Create and manage indexes - Create and manage sequences - Create and manage constraints - Create and manage tables - Create and manage views |
| Using DML Statements | - Control transactions - Update rows in a table - Insert rows into a table - Use the MERGE statement - Delete rows from a table |
| Controlling User Access | - Differentiate system privileges from object privileges - Create and manage roles - Grant and revoke privileges |
| Using Joins | - Use self-joins - Use outer joins (LEFT, RIGHT, FULL) - Use cross joins - Use equijoins and non-equijoins |
| Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
| Using SELECT Statements | - Use the WHERE clause to restrict rows - Execute a basic SELECT statement - Use the ORDER BY clause to sort rows - Use the FETCH clause to limit rows returned |
| Using Subqueries | - Use single-row subqueries - Use multiple-row subqueries - Use correlated subqueries |
1. What happens when a unique index is created on a table column?
A) The column cannot contain duplicate values.
B) The column can only contain NULL values.
C) The column data type is converted to a primary key.
D) The column values are automatically encrypted.
2. Which of the following is a valid reason to create a synonym?
A) To improve query performance
B) To enforce unique constraints on a table
C) To provide simplified and consistent access to an object
D) To automatically generate numeric values for a column
3. Which SQL function can be used to replace NULL values with a specified value?
A) NVL
B) ISNULL
C) REPLACE
D) COALESCE
4. Which function is used to convert a string to uppercase in SQL?
A) UPPER
B) CONVERT_UPPER
C) TO_UPPERCASE
D) CASE_UPPER
5. Which of the following data dictionary views provides information about constraints on tables?
A) All of the above
B) USER_CONSTRAINTS
C) ALL_CONSTRAINTS
D) DBA_CONSTRAINTS
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: C | Question # 3 Answer: A | Question # 4 Answer: A | Question # 5 Answer: A |
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