How can Oracle connect multiple strings?

In Oracle, you can concatenate multiple strings together using the || operator. Here are some examples:

1. I only need one choice.

SELECT 'Hello' || 'World' AS result FROM dual;

The result is:

RESULT
---------------
HelloWorld

1. Can you please confirm your attendance for the meeting tomorrow?

SELECT 'Hello' || ' ' || 'World' AS result FROM dual;

The result is:

RESULT
---------------
Hello World

1. Merge

SELECT CONCAT('Hello', ' ', 'World') AS result FROM dual;

The result is:

RESULT
---------------
Hello World

Both the || operator and the CONCAT function can be used to concatenate any number of strings.