Oracle Database 23ai SQL Associate Sample Questions:
1. What is a SELF JOIN in SQL?
A) A join that does not require a WHERE clause
B) A join between tables with identical structures
C) A join used for Cartesian products
D) A join of a table with itself
2. What is the relationship between SQL and a relational database?
A) SQL is a scripting language used for file manipulation.
B) SQL is a standard query language used to interact with relational databases
C) SQL is a file system used to store relational database data.
D) SQL is used to create flat file databases.
3. How are NULL values treated in relational databases?
A) NULL values represent missing or unknown data.
B) NULL values are treated as zero.
C) NULL values are not allowed in relational databases.
D) NULL values are treated as empty strings.
4. Which data dictionary view lists all indexes created by the current user?
A) USER_INDEXES
B) INDEX_LIST
C) ALL_INDEXES
D) DBA_INDEXES
5. What does the NEXTVAL pseudocolumn do in SQL?
A) Retrieves the current value of a sequence without incrementing it
B) Deletes the sequence from the database
C) Retrieves the next value in a sequence and increments the sequence
D) Resets the sequence to its starting value
Solutions:
Question # 1 Answer: D | Question # 2 Answer: B | Question # 3 Answer: A | Question # 4 Answer: A | Question # 5 Answer: C |
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