Exam 1z0-071 Reference, 1z0-071 Real Brain Dumps

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Oracle 1z0-071 Exam Syllabus Topics:

SectionObjectives
Topic 1: Subqueries and Advanced SQL- Single-row and multi-row subqueries
- Correlated subqueries and nested queries
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: 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
              Topic 4: Data Manipulation and Schema Objects- DML operations
              • 1. INSERT, UPDATE, DELETE, MERGE
                - DDL operations
                • 1. CREATE, ALTER, DROP tables and constraints
                  Topic 5: Relational Database Concepts- Data types and database objects overview
                  - Tables, rows, columns, and relational model basics

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                  Oracle Database SQL Sample Questions (Q120-Q125):

                  NEW QUESTION # 120
                  Examine the SQL statement used to create the TRANSACTION table. (Choose the best answer.) SQL > CREATE TABLE transaction (trn_id char(2) primary key,
                  Start_date date DEFAULT SYSDATE,
                  End_date date NOT NULL);
                  The value 'A1' does not exist for trn_id in this table.
                  Which SQL statement successfully inserts a row into the table with the default value for START_DATE?

                  Answer: A


                  NEW QUESTION # 121
                  View the Exhibit and examine the structure of the CUSTOMERS table.

                  Which two tasks would require subqueries or joins to be executed in a single statement? (Choose two.)

                  Answer: A,D

                  Explanation:
                  Describe the Types of Problems That the Subqueries Can Solve
                  There are many situations where you will need the result of one query as the input for
                  another.
                  Use of a Subquery Result Set for Comparison Purposes
                  Which employees have a salary that is less than the average salary? This could be
                  answered by two statements, or by a single statement with a subquery. The following
                  example uses two statements:
                  select avg(salary) from employees;
                  select last_name from employees where salary < result_of_previous_query ;
                  Alternatively, this example uses one statement with a subquery:
                  select last_name from employees where salary < (select avg(salary)from employees);
                  In this example, the subquery is used to substitute a value into the WHERE clause of the
                  parent query: it is returning a single value, used for comparison with the rows retrieved by
                  the parent query.
                  The subquery could return a set of rows. For example, you could use the following to find
                  all departments that do actually have one or more employees assigned to them:
                  select department_name from departments where department_id in
                  (select distinct(department_id) from employees);


                  NEW QUESTION # 122
                  In the EMPLOYEEStable there are 1000 rows and employees are working in the company for more than 10 years.
                  Evaluate the following SQL statement:

                  What would be the result?

                  Answer: D


                  NEW QUESTION # 123
                  n the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'.
                  Evaluate the following query:
                  What would be the outcome?

                  Answer: C


                  NEW QUESTION # 124
                  Which two are true about the precedence of opertors and condtions

                  Answer: B,E

                  Explanation:
                  Regarding the precedence of operators and conditions in Oracle Database 12c:
                  * Option B: NOT has a higher order of precedence than AND and OR in a condition.
                  * In logical operations, NOT is evaluated first, followed by AND and then OR.
                  * Option E: || has a higher order of precedence than +(addition).
                  * The string concatenation operator || has a higher precedence than the arithmetic + operator.
                  Options A, C, and D are incorrect because:
                  * Option A: Multiplication (*) has a higher precedence than addition (+).
                  * Option C: AND has a higher precedence than OR.
                  * Option D: Conditions (which may contain operators) are evaluated according to the rules of operator precedence.


                  NEW QUESTION # 125
                  ......

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