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Oracle 1z1-071 Exam Syllabus Topics:

Section	Objectives
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	- Correlated subqueries and nested queries - Single-row and multi-row subqueries
Topic 4: SQL Retrieval	- Joins and set operations 1. UNION, INTERSECT, MINUS 2. INNER, OUTER, CROSS joins - SELECT statements and filtering data 1. WHERE clause and conditions 2. ORDER BY and row limiting
Topic 5: Data Manipulation and Schema Objects	- DDL operations 1. CREATE, ALTER, DROP tables and constraints - DML operations 1. INSERT, UPDATE, DELETE, MERGE

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Oracle Database SQL Sample Questions (Q283-Q288):

NEW QUESTION # 283
Which two statements are true regarding the GROUP BY clause in a SQL statement? (Choose two.)

A. Using the WHERE clause after the GROUP BY clause excludes the rows after creating groups.
B. You can use column alias in the GROUP BY clause.
C. Using the WHERE clause before the GROUP BY clause excludes the rows before creating groups.
D. The GROUP BY clause is mandatory if you are using an aggregate function in the SELECT clause.
E. If the SELECT clause has an aggregate function, then those individual columns without an aggregate function in the SELECT clause should be included in the GROUP BY clause.

Answer: C,E

NEW QUESTION # 284
Which statements are true? (Choose all that apply.)

A. Views with the same name but different prefixes, such as DBA, ALLand USER, use the same base tables from the data dictionary.
B. The USER_CONS_COLUMNSview should be queried to find the names of the columns to which a constraint applies.
C. The usernames of all the users including the database administrators are stored in the data dictionary.
D. Both USER_OBJECTSand CATviews provide the same information about all the objects that are owned by the user.
E. The data dictionary views consists of joins of dictionary base tables and user-defined tables.
F. The data dictionary is created and maintained by the database administrator.

Answer: A,B,C

Explanation:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B10501_01/server.920/a96524/c05dicti.htm

NEW QUESTION # 285
You issued this command:

Which three statements are true? (Choose three.)

A. All constraints defined on HR.EMPLOYEES are dropped.
B. Sequences used to populate columns in the HR.EMPLOYEES table are dropped.
C. Synonyms for HR.EMPLOYEES are dropped.
D. The HR.EMPLOYEES table may be moved to the recycle bin.
E. Views referencing HR.EMPLOYEES are dropped.
F. All indexes defined on HR.EMPLOYEES are dropped.

Answer: A,E,F

Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28310/tables010.htm#ADMIN01505

NEW QUESTION # 286
Which three statements are correct regarding indexes? (Choose three.)

A. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically attempts to create a unique index.
B. For each DML operation performed on a table, the corresponding indexes are automatically updated if required.
C. Indexes should be created on columns that are frequently referenced as part of any expression.
D. When a table is dropped, corresponding indexes are automatically dropped.

Answer: A,B,D

Explanation:
Explanation
References:
http://viralpatel.net/blogs/understanding-primary-keypk-constraint-in-oracle/

NEW QUESTION # 287
Examine the description of the CUSTOMERStable:

You want to display details of all customers who reside in cities starting with the letter D followed by at least two characters.
Which query can be used?
SELECT * FROM customers WHERE city = 'D_%';

A. SELECT * FROM customers WHERE city = '%D_';
B.
C. SELECT * FROM customers WHERE city LIKE 'D_%';
D. SELECT * FROM customers WHERE city LIKE 'D_';

Answer: A

NEW QUESTION # 288
......

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