Free PDF Oracle - 1z1-071 - Oracle Database SQL Newest Valid Examcollection

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Oracle 1z1-071 Exam Syllabus Topics:

SectionObjectives
Topic 1: Relational Database Concepts- Data types and database objects overview
- Tables, rows, columns, and relational model basics
Topic 2: SQL Functions- Single-row functions
  • 1. Character, numeric, date functions
    - Conversion and conditional functions
    • 1. TO_CHAR, TO_NUMBER, CASE expressions
      Topic 3: Subqueries and Advanced SQL- Single-row and multi-row subqueries
      - Correlated subqueries and nested queries
      Topic 4: SQL Retrieval- SELECT statements and filtering data
      • 1. ORDER BY and row limiting
        • 2. WHERE clause and conditions
          - Joins and set operations
          • 1. INNER, OUTER, CROSS joins
            • 2. UNION, INTERSECT, MINUS
              Topic 5: Data Manipulation and Schema Objects- DML operations
              • 1. INSERT, UPDATE, DELETE, MERGE
                - DDL operations
                • 1. CREATE, ALTER, DROP tables and constraints

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                  Oracle Database SQL Sample Questions (Q221-Q226):

                  NEW QUESTION # 221
                  Which three actions can you perform only with system privileges?

                  Answer: B,C,E

                  Explanation:
                  A . Correct. Truncating a table, especially in another schema, requires the ALTER ANY TABLE or DROP ANY TABLE system privilege. B. Correct. Accessing external files through the database involves the CREATE ANY DIRECTORY privilege, which is a system privilege. C. Correct. Creating a session in a database, which is required to log in, necessitates the CREATE SESSION system privilege. D. Incorrect. Querying any table is an object privilege, which can be granted by the owner of the table. E. Incorrect. The WITH GRANT OPTION clause is used with object privileges, not system privileges. F. Incorrect. Executing a procedure in another schema requires the EXECUTE object privilege on that procedure.
                  Oracle Database Security Guide provides the details about system privileges necessary for these actions.


                  NEW QUESTION # 222
                  Which two statements are true about INTERVAL data types

                  Answer: A,B

                  Explanation:
                  Regarding INTERVAL data types in Oracle Database 12c:
                  * A. INTERVAL YEAR TO MONTH columns only support monthly intervals within a range of years. This is true. The INTERVAL YEAR TO MONTH data type stores a period of time using years and months.
                  * E. INTERVAL DAY TO SECOND columns support fractions of seconds. This is true. The INTERVAL DAY TO SECOND data type can store days, hours, minutes, seconds, and fractional seconds.
                  Options B, C, D, and F are incorrect:
                  * B is incorrect because data types between INTERVAL DAY TO SECOND and INTERVAL YEAR TO MONTH are not compatible.
                  * C is incorrect as it incorrectly limits INTERVAL YEAR TO MONTH to a single year.
                  * D is incorrect; the YEAR field can be negative to represent a past interval.
                  * F is incorrect as INTERVAL YEAR TO MONTH supports intervals that can span multiple years, not just annual increments.


                  NEW QUESTION # 223
                  View the Exhibit and examine the structure of the PRODUCT_INFORMATION and INVENTORIES tables.

                  You have a requirement from the supplies department to give a list containing PRODUCT_ID, SUPPLIER_ID, and QUANTITY_ON_HAND for all the products wherein QUANTITY_ON_HAND is less than five.
                  Which two SQL statements can accomplish the task? (Choose two.)

                  Answer: A,C


                  NEW QUESTION # 224
                  What is true about non-equijoin statement performance?

                  Answer: A

                  Explanation:
                  When comparing the performance of different SQL join types and conditions, Oracle SQL optimizations generally ensure that performance is consistent across different syntactical forms of expressing the same logic:
                  Option A: False. The BETWEEN condition does not inherently perform worse than using >= and <=. Oracle's optimizer typically evaluates these conditions similarly, optimizing the underlying execution based on the data distribution and available indexes.
                  Option B: False. Oracle's optimizer is designed to handle both Oracle-specific join syntax and ANSI join syntax with equal competence. Performance differences would typically be negligible because the optimizer translates both into an optimal execution plan based on the same underlying mechanisms.
                  Option C: True. The join syntax used (whether Oracle's traditional syntax or ANSI standard syntax) generally does not affect the performance. Oracle's query optimizer is adept at translating different syntaxes into efficient execution plans.
                  Option D: False. The assertion that BETWEEN always performs better than >= and <= is incorrect. Performance depends more on factors like indexing, the specific data and distribution, and the Oracle optimizer's capabilities than on the mere choice of syntax.
                  Option E: False. While table aliases help improve query readability and can prevent ambiguity in SQL queries, they do not inherently improve performance. Their use is a best practice for code clarity and maintenance, not performance enhancement.


                  NEW QUESTION # 225
                  View the Exhibit and examine the details of the PRODUCT_INFORMATION table.

                  Evaluate this SQL statement:
                  SELECT TO_CHAR (list_price, '$9,999')
                  From product_information;
                  Which two statements are true regarding the output? (Choose two.)

                  Answer: B,D


                  NEW QUESTION # 226
                  ......

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