Which of the following data types in MySQL can store a text string of unlimited length? TEXTVARCHARMEDIUMTEXT LONGTEXT

The data type in MySQL that can store a text string of unlimited length is LONGTEXT.

Here's a brief explanation of each data type:

1. TEXT: A BLOB or TEXT column with a maximum length of 65,535 (2^16 - 1) characters.

2. VARCHAR: A variable-length string between 1 and 255 characters in length.

3. MEDIUMTEXT: A BLOB or TEXT column with a maximum length of 16,777,215 (2^24 - 1) characters.

4. LONGTEXT: A BLOB or TEXT column with a maximum length of 4,294,967,295 or 4GB (2^32 - 1) characters.

So, among these, LONGTEXT can store the most amount of text, but it's not technically "unlimited." MySQL does not have a built-in data type that can store a text string of truly unlimited length.