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Oracle Database 23ai SQL Associate Sample Questions:

1. Which command would drop an index from a table?

A) DELETE INDEX
B) DROP INDEX
C) TRUNCATE INDEX
D) REMOVE INDEX

2. What is the difference between UNION and UNION ALL?

A) UNION includes all rows, while UNION ALL removes duplicates.
B) UNION combines columns, while UNION ALL combines rows.
C) UNION removes duplicates, while UNION ALL includes all rows, including duplicates.
D) UNION works with subqueries, while UNION ALL does not.

3. What happens when a temporary table is created in Oracle Database?

A) It is permanently stored in the database.
B) It cannot have any constraints.
C) It is created for the duration of a user session or transaction.
D) It is stored in external files.

4. Which SQLPlus command displays defined substitution variable values?

A) LIST
B) VERIFY
C) SHOW
D) DEFINE

5. What is the primary purpose of a primary key in a relational database?

A) To store duplicate data in a table
B) To sort data in ascending order
C) To establish relationships between tables
D) To uniquely identify each record in a table

Solutions: