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Oracle 1z1-071 exam covers a broad range of topics, including SQL, data manipulation, data control language, data definition language, and basic database concepts. Candidates are expected to have a good understanding of SQL and be able to perform basic database operations. 1z0-071 Exam also tests the candidate's ability to use SQL to retrieve and manipulate data from Oracle databases.

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Exam Topics

The Oracle 1z0-071 Exam checks the candidates’ expertise in a wide range of technical areas. The description of each topic included in this certification test is outlined below:

Understanding Relational Database Concepts: Within this objective, the test takers should demonstrate that they are capable of describing both physical and theoretical relation database aspects; associating the clauses within SQL Select Statement with the ERD components; describing the link between SQL and a database.
Using Single-Row Functions to Configure Output: The topic encompasses one’s skills in manipulating strings with the character functions within the SQL SELECT as well as WHERE clauses; implementing arithmetic using date data; manipulating numbers with MOD, TRUNC, and ROUND functions; manipulating dates using the date function.
Showcasing Data from Multiple Tables: In the framework of this area, the examinees need to prove their proficiency in utilizing self-joins; utilizing different joins types; utilizing non equijoins; utilizing OUTER joins; describing and utilizing Cartesian products.
Managing Indexes Synonyms & Sequences: This domain focuses on such technical skills as handling indexes; handling sequences as well as handling synonyms.
Sorting & Restricting Data: Here, the applicants must be conversant with implementing precedence rules for the operators within an expression; restricting Rows Returned within the SQL Statement; utilizing Substitution Variables; utilizing VERIFY as well as DEFINE commands.
Retrieving Data with the Help of the SQL SELECT Statement: This domain includes the following technical skills: utilizing column aliases; utilizing the SQL SELECT statement; utilizing literal character strings, replacement quote operator, the DISTINCT keyword, concatenation operator; utilizing arithmetic expressions as well as NULL values within the SELECT statement.
Reporting Aggregated Data with the Help of Group Functions: This includes such technical abilities as restricting group results; creating data groups; utilizing group functions.
Managing Views: This area comes with the abilities, such as differentiating object privileges from system privileges; granting privileges on tables; distinguishing between granting roles and privileges.
Using SET Operators: To tackle the question from this sector, the students need to have expertise in matching the SELECT statements; utilizing the ORDER BY clause within set operations; utilizing the INTERSECT operator; utilizing the MINUS operator; utilizing the UNION as well as UNION ALL operators.
Using Subqueries to Solve Queries: The skills covered in this topic include utilizing single row subqueries; upgrading and deleting rows with the help of correlated subqueries; utilizing multiple-row subqueries.

Oracle Database SQL Sample Questions (Q280-Q285):

NEW QUESTION # 280
Examine this SQL statement:

Which two are true?

A. The subquery is executed for every row in the EMPLOYEES table.
B. All existing rows in the EMPLOYEES table are deleted.
C. The DELETE statement executes successfully even if the subquery selects multiple rows.
D. The subquery is not a correlated subquery.
E. The subquery is executed before the DELETE statement is executed.

Answer: A,E

NEW QUESTION # 281
Which three statements are true regarding group functions? (Choose three.)

A. They can be used together with the single-row functions in the SELECT clause.
B. They can be used on columns or expressions.
C. They can be used only on one column in the SELECT clause.
D. They can be passed as an argument to another group function.
E. They can be used with a SQL statement that has a GROUP BY clause.

Answer: A,B,D

Explanation:
Explanation
References:
https://www.safaribooksonline.com/library/view/mastering-oracle-sql/0596006322/ch04.html

NEW QUESTION # 282
Which statement will return a comma-separated list of employee names in alphabetical order for each department in the EMP table?

A. Select deptno. LISTAGG(ename, ',') WITHIN GROUP AS employee-list
FROM emp
ORDER BY ename;
B. Select deptno. no LISTAGG(ename, ',') WITHIN GROUP(ORDER BY ename) AS employee-list FROM emp ORDER BY emp
C. Select deptno. LISTAGG(ename, ',') WITHIN GROUP AS employee-list
FROM emp
GROUP BY emp
D. Select deptno. no LISTAGG(ename, ',') WITHIN GROUP (GROUP BY deptno) AS employee-list FROM emp ORDER BY emp

Answer: B

NEW QUESTION # 283
Examine the description of the PRODUCTS table:

Which three queries use valid expressions?

A. SELECT ptoduct_id, (expiry_date-delivery_date) * 2 FROM products;
B. SELECT product_id,unit_price || "Discount", unit_price + surcharge-discount FROM products;
C. SELECT produet_id, unit_pricer, 5 "Discount",unit_price+surcharge-discount FROM products;
D. SPLECT product_id, expiry_date * 2 FROM products;
E. SELEGT product_id, unit_price, unit_price + surcharge FROM products;
F. SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products;

Answer: A,E,F

Explanation:
B . SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products; C. SELECT product_id, (expiry_date - delivery_date) * 2 FROM products; E. SELECT product_id, unit_price, unit_price + surcharge FROM products; Comprehensive and Detailed Explanation WITH all Reference:
A . This is invalid because "Discount" is a string literal and cannot be used without quotes in an arithmetic operation. Also, there is a typo in unit_pricer, and 'discount' is not a defined column in the table. B. This is valid. It shows a mathematical calculation with unit_price, which is of NUMBER type. Division and multiplication are valid operations on numbers. C. This is valid. The difference between two DATE values results in the number of days between them, and multiplying this value by a number is a valid operation. D. This is invalid because expiry_date is of DATE type and cannot be multiplied by a number. Also, there's a typo: "SPLECT" should be "SELECT". E. This is valid. Both unit_price and surcharge are NUMBER types, and adding them together is a valid operation. F. This is invalid because concatenation operator || is used between a number (unit_price) and a string literal "Discount", which is not enclosed in single quotes, and 'discount' is not a defined column in the table.
In SQL, arithmetic operations on numbers and date arithmetic are valid expressions. Concatenation is also a valid expression when used correctly between string values or literals. Operations that involve date types should not include multiplication or division by numbers directly without a proper interval type in Oracle SQL.
These rules are detailed in the Oracle Database SQL Language Reference, where expressions, datatype precedence, and operations are defined.

NEW QUESTION # 284
Examine the types and examples of relationship that follows: (Choose the best answer.)
1 One-to-one a) teacher to Student
2 One-to-many b) Employees to Manager
3 Many-to-one c) Person to SSN
4 Many-to-many d) Customers to Products
Which option indicates correctly matched relationships?

A. 1-c, 2-d, 3-a, and 4-b
B. 1-a, 2-b, 3-c, and 4-d
C. 1-d, 2-b, 3-a, and 4-c
D. 1-c, 2-a, 3-b, and 4-d

Answer: B

NEW QUESTION # 285
......

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