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Correct your mistake

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Oracle Database 23ai SQL Associate Sample Questions:

1. What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);

A) Creates a temporary table
B) Creates a table with only VARCHAR2 and DATE columns
C) Creates a table with a primary key and a NOT NULL constraint
D) Creates a table with no constraints

2. Which Oracle SQL function returns the current date and time, including time zone information?

A) NOW
B) SYSDATE
C) CURRENT_DATE
D) CURRENT_TIMESTAMP

3. Which data dictionary view lists all indexes created by the current user?

A) USER_INDEXES
B) ALL_INDEXES
C) DBA_INDEXES
D) INDEX_LIST

4. Which of the following is true about foreign key constraints in SQL?

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

5. How can you ensure that data is sorted in descending order in a SQL query?

A) Use the DESC keyword
B) Use the DISTINCT keyword
C) Use the ORDER keyword
D) Use the ASC keyword

Solutions: