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| Section | Weight | Objectives |
|---|---|---|
| Restricting and Sorting Data | 15% | - WHERE clause and filtering conditions - Operator precedence - Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules |
| Using Single-Row Functions to Customize Output | 20% | - Character, number, and date functions - Nested functions usage |
| Using Data Dictionary Views | - Retrieve metadata and object information | |
| Using SET Operators | - Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators | |
| Retrieving Data Using SQL SELECT Statement | 20% | - Column aliases, concatenation, literals and DISTINCT - SELECT statement syntax and usage - Arithmetic operations and NULL handling |
| Managing Tables and Constraints | - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null - Temporary and external tables | |
| Aggregating Data Using Group Functions | 10% | - SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses - Handling NULLs in group functions |
| Displaying Data from Multiple Tables | 15% | - Cartesian products - Equijoins and non-equijoins - Self-joins and outer joins |
| 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 | |
| Manipulating Data and Managing Transactions | - INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts | |
| Relational Database Concepts | 10% | - ERD and SQL statement mapping - Relationship between database and SQL - Theoretical and physical aspects of relational databases |
| Controlling User Access | - System and object privileges - Roles, granting and revoking privileges | |
| Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Working with Time Zones and Date/Time Data | - Time zone conversion functions - TIMESTAMP, INTERVAL data types | |
| Conversion Functions and Conditional Expressions | 10% | - NVL, NULLIF, COALESCE and CASE expressions - TO_CHAR, TO_NUMBER, TO_DATE functions - Implicit and explicit data type conversion |
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NEW QUESTION # 418
Examine the description of the ORDERStable:
Examine the description of the INVOICEStable:
Examine this query:
Which three rows will it return? (Choose three.)
Answer: B,C,G
NEW QUESTION # 419
You own table DEPARTMENTS, referenced by views, indexes, and synonyms.
Examine this command which executes successfully:
DROP TABLE departments PURGE;
Which three statements are true?
Answer: A,D,F
NEW QUESTION # 420
View the Exhibit and examine the structure of CUSTOMERS table.
Evaluate the following query:
Which statement is true regarding the above query?
Answer: D
NEW QUESTION # 421
You issue this command which succeeds:
SQL> DROP TABLE products;
Which three statements are true?
Answer: C,D,E
NEW QUESTION # 422
The PRODUCT_INFORMATIONtable has a UNIT_PRICEcolumn of data type NUMBER (8, 2).
Evaluate this SQL statement:
SELECT TO_CHAR(unit_price, '$9,999') FROM product_information;
Which two statements are true about the output? (Choose two.)
Answer: A,E
NEW QUESTION # 423
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