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| Section | Weight | Objectives |
|---|---|---|
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Using Functions | 25% | - Data type conversion: implicit and explicit - Group functions and grouping data - Character functions for string manipulation - Date arithmetic and date functions - Restricting group results - Nested functions - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Retrieving and Sorting Data | 15% | - Sorting query results - Operator precedence rules - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Arithmetic expressions and NULL values |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| DDL for Tables and Relationships | 15% | - Views management - Constraints management - TRUNCATE TABLE statement - Drop columns, set unused columns - CREATE TABLE statement - Temporary and external tables - Table structure, columns, data types |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
Our 1Z0-171 study guide has become a brand for our candidates to get help for their exams. Because our 1Z0-171 learning materials contain not only the newest questions appeared in real exams in these years, but the most classic knowledge to master. Besides, it is unavoidable that you may baffle by some question points during review process of the 1Z0-171 Exam Questions, so there are clear analysis under some necessary questions.
NEW QUESTION # 86
What does the COMMIT statement do in SQL?
Answer: A
NEW QUESTION # 87
What happens when a unique index is created on a table column?
Answer: C
NEW QUESTION # 88
What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);
Answer: B
NEW QUESTION # 89
Which operator can be used in a multiple-row subquery to match a single value to a list of values?
Answer: A
NEW QUESTION # 90
Which SQL function converts a string representation of a date into a date data type?
Answer: B
NEW QUESTION # 91
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