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Oracle 1z0-071 Exam Syllabus Topics:

Section	Objectives
SQL Retrieval	- Joins and set operations 1. UNION, INTERSECT, MINUS 2. INNER, OUTER, CROSS joins - SELECT statements and filtering data 1. ORDER BY and row limiting 2. WHERE clause and conditions
Subqueries and Advanced SQL	- Single-row and multi-row subqueries - Correlated subqueries and nested queries
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
Relational Database Concepts	- Tables, rows, columns, and relational model basics - Data types and database objects overview

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Oracle Database SQL Sample Questions (Q123-Q128):

NEW QUESTION # 123
Examine the data in the ORD_ITEMStable:

Evaluate this query:

Which statement is true regarding the result?

A. It displays the item nos with their average quantity where the average quantity is more than double the overall minimum quantity of all the items in the table.
B. It returns an error because the HAVING clause should be specified after the GROUP BY clause.
C. It displays the item nos with their average quantity where the average quantity is more than double the minimum quantity of that item in the table.
D. It returns an error because all the aggregate functions used in the HAVING clause must be specified in the SELECT list.

Answer: C

NEW QUESTION # 124
Examine the description of the EMPLOYEEStable:

Which query is valid?

A. join_date;
SELECT dept_id, join_date, SUM(salary) FROM employees GROUP BY dept_id;
B. SELECT dept_id, AVG(MAX(salary)) FROM employees GROUP BY dept_id;
C. SELECT dept_id, MAX(AVG(salary)) FROM employees GROUP BY dept_id;
D. SELECT dept_id, join_date, SUM(salary) FROM employees GROUP BY dept_id,

Answer: A

NEW QUESTION # 125
Examine this partial command:

Which two clauses are required for this command to execute successfully?

A. the LOCATION clause
B. the access driver TYPE clause
C. the DEFAULT DIRECTORY clause
D. the ACCESS PARAMETERS clause
E. the REJECT LIMIT clause

Answer: A,B

Explanation:
In Oracle Database 12c, when creating an external table using the CREATE TABLE ... ORGANIZATION EXTERNAL statement, there are certain clauses that are mandatory for the command to execute successfully.
Statement C, the LOCATION clause, is required. The LOCATION clause specifies one or more external data source locations, typically a file or a directory that the external table will read from. Without this, Oracle would not know where to find the external data for the table.
Statement E, the access driver TYPE clause, is also required. The access driver tells Oracle how to interpret the format of the data files. The most common access driver is ORACLE_LOADER, which allows the reading of data files in a format compatible with the SQL*Loader utility. Another option could be ORACLE_DATAPUMP, which reads data in a Data Pump format.
Statements A, B, and D are not strictly required for the command to execute successfully, although they are often used in practice:
A, the DEFAULT DIRECTORY clause, is not mandatory if you have specified the full path in the LOCATION clause, but it is a best practice to use it to avoid hard-coding directory paths in the LOCATION clause.
B, the REJECT LIMIT clause, is optional and specifies the maximum number of errors to allow during the loading of data. If not specified, the default is 0, meaning the load will fail upon the first error encountered.
D, the ACCESS PARAMETERS clause, is where one would specify parameters for the access driver, such as field delimiters and record formatting details. While it is common to include this clause to define the format of the external data, it is not absolutely required for the command to execute; defaults would be used if this clause is omitted.
For reference, you can find more details in the Oracle Database SQL Language Reference for version 12c, under the CREATE TABLE statement for external tables.

NEW QUESTION # 126
You execute these commands:
SQL> DEFINE hiredate = '01-APR -2011';
SQL> SELECT employee_id, first_name, salary FROM employees WHERE hire date > &hiredate AND manager_id >&mgr_id; For which substitution variables will you be prompted?

A. &hiredate and &mgr_id
B. none
C. only &mgr_id
D. only &hiredate

Answer: C

Explanation:
* D. only &mgr_id: Since the hiredate variable is already defined before the SELECT statement, you will not be prompted for &hiredate again. However, &mgr_id has not been defined, so you will be prompted for this substitution variable.

NEW QUESTION # 127
View and Exhibit and examine the structure and data in the INVOICE table. (Choose two.) Which two statements are true regarding data type conversion in query expressions?

A. inv_amt = '0255982' : requires explicit conversion
B. inv_date > '01-02-2008' : uses implicit conversion
C. CONCAT(inv_amt, inv_date) : requires explicit conversion
D. inv_no BETWEEN '101' AND '110' : uses implicit conversion
E. inv_date = '15-february-2008' :uses implicit conversion

Answer: D,E

NEW QUESTION # 128
......

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