Can a Single MySQL Query Remove Newline Characters from Data Rows?

Removing Newline Characters from MySQL Data Rows in a Single Query

In PHP, iterating through database rows and manually trimming newline characters from each row can be a time-consuming process. This article explores whether it's possible to achieve the same result in a single MySQL query.

The Problem

The user is looking for a way to remove newline characters from data rows in a MySQL table without looping through the rows individually. They suggest using the TRIM() function, but wonder if it's possible to do this in a single query.

The Answer

Yes, it is possible to remove newline characters from MySQL data rows in a single query. The following query will accomplish this:

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

This query uses the REPLACE() function to first remove all carriage return characters (r) from the title column. It then uses REPLACE() again to remove all newline characters (n). The result is a title column with all newline characters removed.

Additional Notes

The query provided will also remove any carriage return characters (r) from the title column. If you only want to remove newline characters, you can use the following query instead:

UPDATE mytable SET title = REPLACE(title, '\n', '');

It's important to note that the use of REPLACE() can be inefficient for large datasets. If you have a large table, you may want to consider using a different method to remove newline characters, such as using a regular expression.

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