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Oracle Database 23ai SQL Associate Sample Questions:

1. What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;

A) The time part of the current date
B) An error
C) The current date in the format 'DD-MM-YYYY'
D) The current date in the default system format

2. Which of the following best describes a relational database?

A) A database that organizes data hierarchically
B) A flat file system with no defined relationships between data
C) A database that uses a tabular structure with rows and columns to represent relationships between data entities
D) A database where all data is stored as key-value pairs

3. What happens when the maximum value of a sequence is reached?

A) An error is raised, and the sequence must be recreated.
B) The sequence starts decrementing values.
C) The sequence stops generating values.
D) The sequence resets to the starting value if the CYCLE option is specified.

4. Which SQL statement is used to insert a new row into a table?

A) INSERT
B) UPDATE
C) ALTER
D) SELECT

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

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

Solutions: