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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Objectives
Using DML Statements	- Use the MERGE statement - Update rows in a table - Delete rows from a table - Control transactions - Insert rows into a table
Using Joins	- Use equijoins and non-equijoins - Use self-joins - Use outer joins (LEFT, RIGHT, FULL) - Use cross joins
Using SELECT Statements	- Use the ORDER BY clause to sort rows - Use the FETCH clause to limit rows returned - Use the WHERE clause to restrict rows - Execute a basic SELECT statement
Using DDL Statements	- Create and manage constraints - Create and manage tables - Create and manage views - Create and manage sequences - Create and manage indexes
Controlling User Access	- Grant and revoke privileges - Differentiate system privileges from object privileges - Create and manage roles
Using Set Operators	- Use UNION, UNION ALL, INTERSECT, and MINUS operators
Using Subqueries	- Use multiple-row subqueries - Use correlated subqueries - Use single-row subqueries
Using SQL Functions	- Use character, number, and date functions in SELECT statements - Use conversion functions

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Oracle Database 23ai SQL Associate Sample Questions (Q66-Q71):

NEW QUESTION # 66
What does the INTERSECT operator do in SQL?

A. Returns rows from the first query that are not present in the second query
B. Combines rows from two queries and includes all duplicates
C. Combines all rows from two queries without any conditions
D. Returns rows that are present in both queries

Answer: D

NEW QUESTION # 67
What happens when a unique index is created on a table column?

A. The column can only contain NULL values.
B. The column data type is converted to a primary key.
C. The column values are automatically encrypted.
D. The column cannot contain duplicate values.

Answer: D

NEW QUESTION # 68
What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;

A. NULL
B. 0
C. 1
D. 2

Answer: D

NEW QUESTION # 69
What happens when the maximum value of a sequence is reached?

A. The sequence stops generating values.
B. The sequence resets to the starting value if the CYCLE option is specified.
C. An error is raised, and the sequence must be recreated.
D. The sequence starts decrementing values.

Answer: B

NEW QUESTION # 70
Which of the following is true about foreign key constraints in SQL?

A. They define a relationship between two tables.
B. They ensure that a column only contains NULL values.
C. They enforce the uniqueness of values in a column.

Answer: A

NEW QUESTION # 71
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