What are some potential pitfalls of using a comma-separated list in a database for storing multiple values?

Using a comma-separated list in a database for storing multiple values can make it difficult to search, update, or manipulate individual values. It can also lead to data redundancy and inconsistency if values are not properly formatted or if there are errors in the list. To solve this issue, it is recommended to use a separate table to store the multiple values in a normalized database structure.

// Example of using a separate table to store multiple values in a normalized structure

// Create a new table to store the multiple values
CREATE TABLE items (
    id INT PRIMARY KEY,
    value VARCHAR(255)
);

// Insert values into the items table
INSERT INTO items (id, value) VALUES (1, 'value1');
INSERT INTO items (id, value) VALUES (1, 'value2');
INSERT INTO items (id, value) VALUES (2, 'value3');

// Retrieve values from the items table
SELECT * FROM items WHERE id = 1;