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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Conversion Functions and Conditional Expressions | 10% | - TO_CHAR, TO_NUMBER, TO_DATE functions - Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions |
| Topic 2: Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Topic 3: Manipulating Data and Managing Transactions | - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts | |
| Topic 4: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 5: Managing Tables and Constraints | - Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables - Temporary and external tables | |
| Topic 6: Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Topic 7: Relational Database Concepts | 10% | - Relationship between database and SQL - ERD and SQL statement mapping - Theoretical and physical aspects of relational databases |
| Topic 8: Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Topic 9: Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Topic 10: Managing Indexes, Synonyms and Sequences | - Create and use synonyms - Create and use sequences - Create and maintain indexes | |
| Topic 11: Aggregating Data Using Group Functions | 10% | - GROUP BY and HAVING clauses - Handling NULLs in group functions - SUM, AVG, COUNT, MAX, MIN functions |
| Topic 12: Displaying Data from Multiple Tables | 15% | - Cartesian products - Self-joins and outer joins - Equijoins and non-equijoins |
| Topic 13: 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 14: Managing Views | - Updatable and read-only views - Create, modify and drop views | |
| Topic 15: Using SET Operators | - UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations | |
| 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 # 261
Which two statements are true about date/time functions in a session where NLS_DATE_FORMAT is set to DD-MON-YYYY HH24:MI:SS?
Answer: A,F
NEW QUESTION # 262
Examine the structure of the INVOICEtable.
Which two SQL statements would execute successfully?
SELECT inv_no, NVL2(inv_date, 'Pending', 'Incomplete')
Answer: C,D
NEW QUESTION # 263
View the Exhibit and examine the structure of the PRODUCTStable
Which two tasks would require subqueries? (Choose two.)
Answer: A,E
NEW QUESTION # 264
Evaluate the following ALTER TABLE statement:
ALTER TABLE orders SET UNUSED order_date; Which statement is true?
Answer: C
NEW QUESTION # 265
View the exhibit and examine the data in ORDERS_MASTERand MONTHLY_ORDERStables.
Evaluate the following MERGEstatement:
MERGE_INTO orders_master o
USING monthly_orders m
ON (o.order_id = m.order_id)
WHEN MATCHED THEN
UPDATE SET o.order_total = m.order_total
DELETE WHERE (m.order_total IS NULL)
WHEN NOT MATCHED THEN
INSERT VALUES (m.order_id, m.order_total)
What would be the outcome of the above statement?
Answer: C
Explanation:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm
NEW QUESTION # 266
......
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