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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q301-Q306):

NEW QUESTION # 301
Examine this data in the EMPLOYERS table:

Which statement will execute successfully?

A. SELECT dept_id, INSTR (last_name,'A'), SUM (salary) FROM employees GROUP BY dept_id
B. SELECT dept_id, STDDEV (last_name), SUM (salary) FROM employees GROUP BY dept_id
C. SELECT dept_id, LENGTH (last_name), SUM (salary) FROM employees GROUP BY dept_id
D. SELECT dept_id, MAX (Last_name), SUM (salary) FROM employees GROUP BY dept_id

Answer: D

NEW QUESTION # 302
Which two are true about a SQL statement using SET operators such as UNION?

A. The number, but not names, of columns must be identical for all SELECT statements in the query.
B. The data type group of each column returned by the second query must match the data type group of the corresponding column returned by the first query.
C. The names and number of columns must be identical for all SELECT statements in the query.
D. The data type of each column returned by the second query must exactly match the data type of the corresponding column returned by the first query.
E. The data type of each column returned by the second query must be implicitly convertible to the data type of the corresponding column returned by the first query.

Answer: A,D

NEW QUESTION # 303
You need to list the employees in DEPARTMENT_ID20 days in a single row, ordered by HIRE_DATE.
Examine the sample output:

Which query will provide the required output?
SELECT LISTAGG(last_name)

A. WITHIN GROUP ORDER BY (hire_date) "Emp_list", MIN(hire_date) "Earliest" FROM employees WHERE department_id = 30; SELECT LISTAGG(last_name, '; ')
B. FROM employees
WHERE department_id = 30;
WITHIN GROUP ORDER BY (hire_date);
SELECT LISTAGG(last_name, '; ') "Emp_list", MIN(hire_date) "Earliest"
C. WITHIN GROUP ORDER BY (hire_date) "Emp_list", MIN(hire_date) "Earliest" FROM employees WHERE department_id = 30; SELECT LISTAGG(last_name, '; ') "Emp_list", MIN(hire_date) "Earliest"
D. FROM employees
WHERE department_id = 30;
ORDER BY (hire_date);

Answer: C

NEW QUESTION # 304
You want to write a query that prompts for two column names and the WHERE condition each time it is executed in a session but only prompts for the table name the first time it is executed.
The variables used in your query are never undefined in your session?
Which query can be used?

Answer: A

NEW QUESTION # 305
Which two statements are true about a self join?

A. It can be a left outer join.
B. The join key column must have an index.
C. It can be an inner join.
D. It must be an equijoin.
E. It must be a full outer jolin.

Answer: B,C

NEW QUESTION # 306
......

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