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Oracle 1z1-071 Exam Syllabus Topics:

Section	Objectives
Topic 1: SQL Retrieval	- SELECT statements and filtering data 1. ORDER BY and row limiting 2. WHERE clause and conditions - Joins and set operations 1. UNION, INTERSECT, MINUS 2. INNER, OUTER, CROSS joins
Topic 2: Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries
Topic 3: Data Manipulation and Schema Objects	- DML operations 1. INSERT, UPDATE, DELETE, MERGE - DDL operations 1. CREATE, ALTER, DROP tables and constraints
Topic 4: SQL Functions	- Single-row functions 1. Character, numeric, date functions - Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions
Topic 5: 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 (Q401-Q406):

NEW QUESTION # 401
Examine the business rule:
Each student can take up multiple projects and each project can have multiple students.
You need to design an Entity Relationship Model (ERD) for optimal data storage and allow
for generating reports in this format: STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK
Which two statements are true in this scenario?

A. The ERD must have a M:M relationship between the students and projects entities that must be resolved into 1:M relationships.
B. STUDENT_ID must be the primary key in the STUDENTS entity and foreign key in the projects entity.
C. An associative table must be created with a composite key of STUDENT_ID andPROJECT_ID; which is the foreign key linked to theSTUDENTSandPROJECTSentities.
D. PROJECT_ID must be the primary key in the projects entity and foreign key in the STUDENTS entity.
E. The ERD must have a1:M relationship between the students and projects entitles.

Answer: C,D

NEW QUESTION # 402
Which three statements are true about performing DML operations on a view with no INSTEAD OF triggers defined?

A. Views cannot be used to query rows from an underlying table if the table has a PRIMARY KEY and the primary key columns are not referenced in the defining query of the view.
B. The WITH CHECK clause has no effect when deleting rows from the underlying table through the view.
C. Views cannot be used to add rows to an underlying table If the table has columns with NOT NULL constraints lacking default values which are not referenced in the defining query of the view.
D. Views cannot be used to add or modify rows in an underlying table If the defining query of the view contains the DISTINCT keyword.
E. Insert statements can always be done on a table through a view.
F. Delete statements can always be done on a table through a view.

Answer: A,C,D

NEW QUESTION # 403
Which is true about the & and && prefixes with substitution variables?

A. The && prefix will not prompt for a value even if the substitution variable is not previously defined in the session.
B. An & prefix to an undefined substitution variable, which is referenced twice in the same query, will prompt for a value twice .
C. Both & and && can prefix a substitution variable name in queries and DML statements.
D. & can prefix a substitution variable name only in queries. DML
E. An && prefix to an undefined substitution variable, which is referenced multiple times in multiple queries, will prompt for a value once per query.

Answer: C

Explanation:
E). True. Both & and && can prefix substitution variables in queries as well as in DML statements. & is used for defining a substitution variable that prompts the user every time the variable is encountered. && is used for a persistent substitution variable that, once defined in the session, will not prompt the user again for a value if used subsequently.

NEW QUESTION # 404
Examine the structure of the BOOKS_TRANSACTIONStable.

You want to update this table such that BOOK_IDis set to 'INVALID'for all rows where no MEMBER_ID has been entered.
Examine this partial SQL statement:

Which condition must be used in the WHEREclause to perform the required update?
MEMBER_ID = '';

A.
B. MEMBER_ID IS NULL;
C. MEMBER_ID = NULL;
D. MEMBER_ID = "";

Answer: D

NEW QUESTION # 405
which three statements are true regarding single row subqueries?

A. THEY MUST BE PLACED ON THE RIGHT SIDE OF THE COMPARISON OPERATOR OR
CONDITION.
B. THEY CAN BE USED in the where clause.
C. they must return a row to prevent errors in the SQL statement.
D. THEY CAN BE USED IN THE HAVING CLAUSE
E. A SQL STATEMENT MAY HAVE MULTIPLE SINGLE ROW SUBQUERY BLOCKS.
F. they must be placed on the left side of the comparison operator or condition.

Answer: B,D,E

NEW QUESTION # 406
......

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