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| Section | Weight | Objectives |
|---|---|---|
| Managing Tables and Constraints | - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null - Temporary and external tables | |
| Displaying Data from Multiple Tables | 15% | - Cartesian products - Self-joins and outer joins - Equijoins and non-equijoins |
| Relational Database Concepts | 10% | - Relationship between database and SQL - Theoretical and physical aspects of relational databases - ERD and SQL statement mapping |
| Conversion Functions and Conditional Expressions | 10% | - Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions - TO_CHAR, TO_NUMBER, TO_DATE functions |
| Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Manipulating Data and Managing Transactions | - INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT | |
| Restricting and Sorting Data | 15% | - Operator precedence - Substitution variables, DEFINE and VERIFY commands - WHERE clause and filtering conditions - ORDER BY clause and sorting rules |
| Managing Views | - Updatable and read-only views - Create, modify and drop views | |
| Managing Indexes, Synonyms and Sequences | - Create and use synonyms - Create and maintain indexes - Create and use sequences | |
| Aggregating Data Using Group Functions | 10% | - SUM, AVG, COUNT, MAX, MIN functions - Handling NULLs in group functions - GROUP BY and HAVING clauses |
| Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Using SET Operators | - Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators | |
| Using Data Dictionary Views | - Retrieve metadata and object information | |
| Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Retrieving Data Using SQL SELECT Statement | 20% | - SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT - Arithmetic operations and NULL handling |
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NEW QUESTION # 195
Which three are true about privileges and roles?
Answer: B,D,G
Explanation:
Roles and privileges in Oracle manage access and capabilities within the database:
Option A: False. Roles are not "owned" in the traditional sense by the user who created them. They exist independently within the Oracle database and are assigned to users.
Option B: False. System privileges can be very granular, affecting specific types of operations or database objects, not always the entire database.
Option C: False. Roles are not owned by the SYS schema but are managed by database security and can be created by any user with sufficient privileges.
Option D: True. A role can indeed contain a combination of several privileges, including other roles, allowing for flexible and layered security configurations.
Option E: True. By default, a user has all object privileges for objects they own (i.e., objects in their schema).
Option F: False. PUBLIC is a special designation that applies to all users; individual privileges granted to PUBLIC cannot be revoked from a single user without revoking them from all users.
Option G: True. PUBLIC is a role granted by default to every user in an Oracle database, providing basic privileges necessary for general usability of the database.
NEW QUESTION # 196
In the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'.
Evaluate the following query:
What would be the outcome?
Answer: C
NEW QUESTION # 197
Examine the structure of the BOOKS_TRANSACTIONS table:
Examine the SQL statement:
Which statement is true about the outcome?
Answer: A
NEW QUESTION # 198
View the Exhibits and examine PRODUCTS and SALES tables.
Exhibit 1
Exhibit 2
You issue the following query to display product name the number of times the product has been sold:
What happens when the above statement is executed?
Answer: D
NEW QUESTION # 199
Examine the description of the ORDERStable:
Examine the description of the INVOICEStable:
Which three statements execute successfully? (Choose three.)
Answer: A,C,D
NEW QUESTION # 200
......
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