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Oracle Database 23ai SQL Associate Sample Questions:

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

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

2. Which function is used to convert a string to uppercase in SQL?

A) CASE_UPPER
B) UPPER
C) TO_UPPERCASE
D) CONVERT_UPPER

3. Which command grants a user the ability to query data from a specific table?

A) GRANT SELECT ON table_name TO user_name;
B) ALLOW SELECT ON table_name TO user_name;
C) ENABLE SELECT ON table_name TO user_name;
D) GRANT ALL ON table_name TO user_name;

4. What happens when a unique index is created on a table column?

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

5. Which of the following data dictionary views provides information about constraints on tables?

A) All of the above
B) DBA_CONSTRAINTS
C) USER_CONSTRAINTS
D) ALL_CONSTRAINTS

Solutions: