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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Aggregating Data Using Group Functions | 10% | - Handling NULLs in group functions - GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions |
| Topic 2: Using SET Operators | - UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations | |
| Topic 3: Displaying Data from Multiple Tables | 15% | - Cartesian products - Equijoins and non-equijoins - Self-joins and outer joins |
| Topic 4: Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Topic 5: Manipulating Data and Managing Transactions | - Multi-table inserts - INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT | |
| Topic 6: Working with Time Zones and Date/Time Data | - Time zone conversion functions - TIMESTAMP, INTERVAL data types | |
| Topic 7: Managing Tables and Constraints | - Constraints: primary key, foreign key, unique, check, not null - Temporary and external tables - Data types, creating/altering/dropping tables | |
| Topic 8: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 9: Restricting and Sorting Data | 15% | - Operator precedence - Substitution variables, DEFINE and VERIFY commands - WHERE clause and filtering conditions - ORDER BY clause and sorting rules |
| Topic 10: Using Subqueries to Solve Queries | - Single-row and multi-row subqueries - Correlated subqueries for update/delete | |
| Topic 11: Managing Indexes, Synonyms and Sequences | - Create and use synonyms - Create and maintain indexes - Create and use sequences | |
| Topic 12: Using Single-Row Functions to Customize Output | 20% | - Character, number, and date functions - Nested functions usage |
| Topic 13: Conversion Functions and Conditional Expressions | 10% | - NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions |
| Topic 14: Retrieving Data Using SQL SELECT Statement | 20% | - Arithmetic operations and NULL handling - SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT |
| Topic 15: Relational Database Concepts | 10% | - Relationship between database and SQL - ERD and SQL statement mapping - Theoretical and physical aspects of relational databases |
| Topic 16: Managing Views | - Create, modify and drop views - Updatable and read-only views |
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NEW QUESTION # 186
View the exhibit and examine the structure of the STORES table.
You must display the NAME of stores along with the ADDRESS, START_DATE, PROPERTY_PRICE, and the projected property price, which is 115% of property price.
The stores displayed must have START_DATE in the range of 36 months starting from 01-Jan-2000 and above.
Which SQL statement would get the desired output?
Answer: B
NEW QUESTION # 187
Which two are true about creating tables in an Oracle database?
Answer: C,D
Explanation:
Regarding creating tables in an Oracle database:
* B. The same table name can be used for tables in different schemas: In Oracle, a schema is essentially a namespace within the database; thus, the same table name can exist in different schemas without conflict, as each schema is distinct.
* C. A system privilege is required: To create tables, a user must have the necessary system privileges, typically granted explicitly or through roles such as CREATE TABLE or administrative privileges depending on the environment setup.
Incorrect options for all three repeated questions:
* A: Oracle SQL does not allow specifying the maximum number of rows directly in a CREATE TABLE statement; this is controlled by storage allocation and database design rather than table creation syntax.
* D: Creating an external table does not create the physical file. It merely creates a table structure that allows access to data stored in an external file specified in the directory; the file itself must already exist or be managed outside of Oracle.
* E: A primary key constraint is not mandatory for creating tables. While it is a common practice to define a primary key to enforce entity integrity, it is not required by the Oracle SQL syntax for table creation.
These answers and explanations are aligned with Oracle Database 12c SQL documentation and standard practices.
NEW QUESTION # 188
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEES_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:
UPDATE employees
SET (job_id, salary) =
(SELECT job_id, salary
FROM employees
WHERE employee_id = 200)
WHERE employee id=100;
Which two statements are true?
Answer: B,F
NEW QUESTION # 189
The SALES table has columns PROD_IDand QUANTITY_SOLDof data type NUMBER.
Which two queries execute successfully? (Choose two.)
SELECT prod_id FROM sales WHERE quantity_sold > 55000 GROUP BY prod_id HAVING
Answer: B,D
NEW QUESTION # 190
View the exhibits and examine the structures of the COSTS and PROMOTIONS tables.
Evaluate the following SQL statement:
What would be the outcome of the above SQL statement?
Answer: A
NEW QUESTION # 191
......
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