How to Efficiently Remove Newline Characters from MySQL Data?

Removing New Line Characters from MySQL Data Rows

When dealing with MySQL data, it's often necessary to remove new line characters (n) from table records. This can be done manually using a PHP script and the TRIM function, as shown in the query:

UPDATE mytable SET title = "'.trim($row['title']).'" where id = "'.$row['id'].'";

However, for large datasets, this approach can be time-consuming and inefficient. To optimize this process, it's desirable to perform the operation with a single SQL query.

One possible solution is:

update mytable SET title = TRIM(title, '\n') where 1=1

While this query may seem like a valid approach, it does not effectively remove new line characters.

Alternative Solution

Instead, the following query provides a more reliable solution:

UPDATE test SET log = REPLACE(REPLACE(log, '\r', ''), '\n', '');

This query addresses the issue by using the REPLACE function twice. The first REPLACE call targets carriage return characters (r), while the second focuses on new line characters (n).

By chaining these REPLACE calls, you can effectively remove both types of line break characters from your table records, ensuring clean and consistent data.

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