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Oracle 1z0-071 (Oracle Database SQL) certification exam is designed for database professionals who want to demonstrate their expertise in SQL development and database management. 1z1-071 exam will test the candidate's knowledge of SQL syntax, data manipulation language (DML), data definition language (DDL), and database security. 1z1-071 Exam also covers topics such as database objects, data modeling, and database administration. Passing 1z1-071 exam will prove that the candidate has the necessary skills to manage Oracle databases and to write efficient SQL queries.

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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:

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.
Using DDL to Handle Tables and Their Relationships: The subject requires the candidates’ skills in explaining and operating with tables; explaining and operating with data types and columns; creating tables; dropping columns as well as setting column UNUSED; truncating tables; creating and utilizing temporary tables; creating and utilizing external tables; handling constraints.
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.
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.
Managing Data in Different Time Zones: The topic requires that the applicants possess competency in operating with CURRENT_TIMESTAMP, LOCALTIMESTAMP, and CURRENT_DATE, as well as dealing with INTERVAL data types.
Managing Tables with the Help of DML Statements: Here, the individuals should know how to manage database transactions; control transactions; implement update, delete, and insert, operations; execute multi-table inserts; execute merge statements.
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.
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.

Oracle Database SQL Sample Questions (Q111-Q116):

NEW QUESTION # 111
View the Exhibit and examine the details of the PRODUCT_INFORMATION table.
Exhibit

You must display PRODUCT_NAME from the table where the CATEGORY_ID column has values 12 or 13, and the SUPPLIER_ID column has the value 102088.
You executed this SQL statement:

Which statement is true regarding the execution?

A. It would not execute because the entire WHERE clause is not enclosed within parentheses.
B. It would execute but would return no rows.
C. It would execute and return the desired result.
D. It would not execute because the same column has been used twice with the AND logical operator.

Answer: B

NEW QUESTION # 112
Which two statements are true regarding constraints? (Choose two.)

A. A column with a FOREIGN KEYconstraint can never contain a NULL value.
B. A constraint can be disabled even if the constrained column contains data.
C. Constraints are enforced only during INSERToperations.
D. All constraints can be defined at the table or column level.
E. A column with a UNIQUEconstraint can contain a NULL value.

Answer: B,E

NEW QUESTION # 113
Which two statements are true about * TABLES views?

A. USER TABLES displays all tables owned by the current user.
B. You must have SELECT privileges on a table to view it in ALL TABLES.
C. You must have SELECT privileges on a table to view it in USER TABLES.
D. All users can query DBA TABLES successfully.
E. All TABLES displays all tables owned by the current user.
F. You must have SELECT privileges on a table to view it in DBA TABLES.

Answer: A,D

Explanation:
For the *TABLES views in Oracle:
* Option C: USER_TABLES displays all tables owned by the current user.
* USER_TABLES is an Oracle data dictionary view that shows all tables owned by the user issuing the query.
* Option F: All users can query DBA_TABLES successfully.
* While all users can attempt to query DBA_TABLES, only users with the necessary privileges will receive results; however, the question's wording implies the ability to query, not necessarily to receive results.
Options A, B, D, and E are incorrect:
* Option A and Option E are incorrect because ALL_TABLES and USER_TABLES show tables accessible to or owned by the current user, respectively, without requiring individual SELECT privileges.
* Option B is incorrect because DBA_TABLES requires users to have the SELECT ANY TABLE privilege or equivalent, not SELECT privileges on each table.
* Option D is incorrect because ALL_TABLES displays all tables that the current user has access to, not just those owned by them.

NEW QUESTION # 114
Examine the description of the BOOKS table:

The table has 100 rows.
Examine this sequence of statements issued in a new session;
INSERT INTO BOOKS VALUES ('ADV112' , 'Adventures of Tom Sawyer', NULL, NULL);
SAVEPOINT a;
DELETE from books;
ROLLBACK TO SAVEPOINT a;
ROLLBACK;
Which two statements are true?

A. The first ROLLBACK command restores the 101 rows that were deleted and commits the inserted row.
B. The second ROLLBACK command replays the delete.
C. The second ROLLBACK command undoes the insert.
D. The first ROLLBACK command restores the 101 rows that were deleted, leaving the inserted row still to be committed.
E. The second ROLLBACK command does nothing.

Answer: C,D

NEW QUESTION # 115
Which two statements are true about the COUNT function?

A. COUNT (DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULLs in the INV_AMT column
B. A SELECT statement using the COUNT function with a DISTINCT keyword cannot have a WHERE clause.
C. It can only be used for NUMBER data types.
D. COUNT(*) returns the number of rows in a table including duplicate rows and rows containing NULLs in any column.
E. COUNT(inv_amt) returns the number of rows in a table including rows with NULL in the INV_AMT column.

Answer: A,D

Explanation:
The COUNT function is one of the most commonly used aggregate functions in SQL for determining the number of items in a group. Here's why the correct answers are B and C:
* A: Incorrect. COUNT can be used with any data type, not just NUMBER. It counts rows without regard to data type.
* B: Correct. COUNT(DISTINCT inv_amt) counts the number of unique non-null values in the column inv_amt. It excludes duplicates and ignores NULL values.
* C: Correct. COUNT(*) counts all rows in a table, including those with duplicates and those with NULLs in any column. It is a total row count regardless of content.
* D: Incorrect. You can use a WHERE clause with COUNT. The WHERE clause filters rows before counting, which is standard in SQL.
* E: Incorrect. COUNT(inv_amt) counts the rows where inv_amt is not NULL. Rows with NULL in the inv_amt column are not counted.

NEW QUESTION # 116
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