A lot of progress is being made in the Oracle sector today. Many companies offer job opportunities to qualified candidates, but they have specific 1Z0-171 certification criteria to select qualified candidates. Thus, they can filter out effective and qualified candidates from the population. Oracle Database 23ai SQL Associate (1Z0-171) must be taken and passed to become a certified individual.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 2: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Topic 3: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 4: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Drop columns, set unused columns - Views management - Temporary and external tables - Constraints management - CREATE TABLE statement - TRUNCATE TABLE statement |
| Topic 5: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 6: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Topic 7: Using Functions | 25% | - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions - Character functions for string manipulation - Nested functions - Data type conversion: implicit and explicit - Restricting group results - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Topic 8: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Topic 9: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 10: Retrieving and Sorting Data | 15% | - Operator precedence rules - Limiting rows and substitution variables - DEFINE and VERIFY commands - Sorting query results - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword |
| Topic 11: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
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NEW QUESTION # 15
Which type of join includes rows that do not have matching values in the joined table?
Answer: B
NEW QUESTION # 16
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: C
NEW QUESTION # 17
Which type of privilege allows a user to perform administrative tasks, such as creating other users?
Answer: D
NEW QUESTION # 18
What is the purpose of the MERGE statement in SQL?
Answer: A
NEW QUESTION # 19
Which operator can be used in a multiple-row subquery to match a single value to a list of values?
Answer: A
NEW QUESTION # 20
......
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