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Oracle 1z1-071 Exam Syllabus Topics:

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

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                  Oracle Database SQL Sample Questions (Q206-Q211):

                  NEW QUESTION # 206
                  Which two queries execute successfully?

                  Answer: A,C

                  Explanation:
                  For SQL queries involving set operations like UNION, UNION ALL, INTERSECT, and MINUS, the data types and number of columns in the SELECT statements being combined must be the same. Here is a breakdown of each query option:
                  * Option A: This query successfully combines results from two tables using UNION ALL, which combines all rows from both SELECT statements, including duplicates. Both queries select two columns (prod_id and exp_date, with exp_date being NULL in the second query). This is valid as the number of columns and their data types match.
                  * Option B: This query attempts to use INTERSECT, which returns only the rows common to both SELECT statements. However, the first SELECT statement chooses prod_id and prod_name, while the second only substitutes a constant value for prod_id without specifying from which table it selects prod_name. If "newproducts" (presumably a typo and should be "new_products") does not have the exact columns as "products", or if the data types do not match, it will fail.
                  * Option C: This query uses UNION, which removes duplicates from the combined dataset. The use of SELECT * assumes that both "products" and "new_products" tables have the same columns in the same order with matching data types. This query will succeed if those conditions are met.
                  * Option D: This query uses MINUS to subtract results of the second SELECT from the first. However, it fails because 'k' does not explicitly match a column name in "products", suggesting a potential error unless 'k' is indeed a valid column.
                  * Option E: This query fails because the first SELECT statement fetches only one column (prod_id) while the second fetches two columns (prod_id and prod_name). UNION ALL requires the same number of columns with compatible types in all SELECT statements involved.


                  NEW QUESTION # 207
                  You want to return the current date and time from the user session, with a data type of TIMESTAMP WITH TIME ZONE.
                  Which function will do this?

                  Answer: D


                  NEW QUESTION # 208
                  View the exhibit and examine the structure of the SALES, CUSTOMERS, PRODUCTS and TIMES tables.

                  The PROD_ID column is the foreign key in the SALES table, which references the PRODUCTS table.
                  Similarly, the CUST_ID and TIME_ID columns are also foreign keys in the SALES table referencing the CUSTOMERS and TIMES tables, respectively.
                  Evaluate the following CREATE TABLE command:
                  CREATE TABLE new_sales (prod_id, cust_id, order_date DEFAULT SYSDATE)
                  AS
                  SELECT prod_id, cust_id, time_id
                  FROM sales;
                  Which statement is true regarding the above command?

                  Answer: B


                  NEW QUESTION # 209
                  Which two statements are true? (Choose two.)

                  Answer: D,E

                  Explanation:
                  A . The USER SYNONYMS view can provide information about private synonyms: This view contains information about private synonyms that have been created by the user. It lists all synonyms that are accessible to the user in their schema.
                  E . DICTIONARY is a view that contains the names of all the data dictionary views that the user can access: This view lists the names of all data dictionary views available to the user, providing a directory of useful database metadata.
                  Incorrect options:
                  B: The SYSTEM user does not own all base tables of the data dictionary; some are owned by SYS.
                  C: Not all users have access to dynamic performance views prefixed with V$; access is restricted based on privileges.
                  D: The USER_OBJECTS view lists all objects owned by the user, not just tables and views but also other types of schema objects like procedures and functions.


                  NEW QUESTION # 210
                  Examine the structure of the BOOKS_TRANSACTIONS table:

                  You want to display the member IDs, due date, and late fee as $2 for all transactions.
                  Which SQL statement must you execute?

                  Answer: C


                  NEW QUESTION # 211
                  ......

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