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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Topic 2: Managing Tables and Constraints | - Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables - Temporary and external tables | |
| Topic 3: Conversion Functions and Conditional Expressions | 10% | - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions - NVL, NULLIF, COALESCE and CASE expressions |
| Topic 4: Manipulating Data and Managing Transactions | - INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts | |
| Topic 5: Aggregating Data Using Group Functions | 10% | - Handling NULLs in group functions - SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses |
| Topic 6: Using SET Operators | - Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators | |
| Topic 7: Relational Database Concepts | 10% | - Theoretical and physical aspects of relational databases - Relationship between database and SQL - ERD and SQL statement mapping |
| Topic 8: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 9: Using Subqueries to Solve Queries | - Single-row and multi-row subqueries - Correlated subqueries for update/delete | |
| Topic 10: Managing Views | - Create, modify and drop views - Updatable and read-only views | |
| Topic 11: Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Topic 12: Restricting and Sorting Data | 15% | - WHERE clause and filtering conditions - Operator precedence - Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules |
| Topic 13: Displaying Data from Multiple Tables | 15% | - Equijoins and non-equijoins - Self-joins and outer joins - Cartesian products |
| Topic 14: Working with Time Zones and Date/Time Data | - Time zone conversion functions - TIMESTAMP, INTERVAL data types | |
| Topic 15: Managing Indexes, Synonyms and Sequences | - Create and maintain indexes - Create and use synonyms - Create and use sequences | |
| Topic 16: Retrieving Data Using SQL SELECT Statement | 20% | - Arithmetic operations and NULL handling - Column aliases, concatenation, literals and DISTINCT - SELECT statement syntax and usage |
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NEW QUESTION # 260
Evaluate the following two queries:
Which statement is true regarding the above two queries?
Answer: A
NEW QUESTION # 261
Examine this data in the EMPLOYEES table:
Which statement will execute successfully?
SELECT dept_id, INSTR(last_name, 'A'), SUM(salary) FROM employees GROUP BY
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION # 262
Examine this partial command:
Which two clauses are required for this command to execute successfully?
Answer: C,E
NEW QUESTION # 263
View the Exhibit and examine the structure of the PRODUCT table.
Which two tasks would require subqueries? (Choose two.)
Answer: A,B
NEW QUESTION # 264
Which statement is true regarding the default behavior of the ORDER BY clause?
Answer: D
Explanation:
Explanation
The ORDER BY clause performs case sensitive sorting with character values.
NEW QUESTION # 265
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