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Oracle Database 23ai SQL Associate Sample Questions:

1. Which type of join retrieves only the rows with matching values in both tables?

A) OUTER JOIN
B) NATURAL JOIN
C) CROSS JOIN
D) INNER JOIN

2. What does the NEXTVAL pseudocolumn do in SQL?

A) Retrieves the next value in a sequence and increments the sequence
B) Retrieves the current value of a sequence without incrementing it
C) Deletes the sequence from the database
D) Resets the sequence to its starting value

3. Which data dictionary view provides information about all tables accessible to the current user?

A) SESSION_TABLES
B) DBA_TABLES
C) USER_TABLES
D) ALL_TABLES

4. Which SQL function calculates the number of months between two dates?
Response:

A) MONTHS_BETWEEN
B) DATE_CALC
C) DATE_DIFF
D) TIME_DIFF

5. What is the purpose of the MERGE statement in SQL?

A) To combine the results of two queries
B) To delete duplicate rows from a table
C) To update existing rows or insert new rows in a target table
D) To join two tables into one

Solutions: