How Can I Efficiently Remove Newline Characters from MySQL Table Rows?

Removing New Line Characters from MySQL Rows

You can remove new line characters from data rows in MySQL using a single query, eliminating the need for looping and updating each row individually.

Query:

UPDATE mytable SET title = TRIM(title, '\n') WHERE 1=1

Explanation:

• TRIM(title, 'n') removes all occurrences of the new line character (n) from the title column.
• WHERE 1=1 is a condition that always evaluates to true, ensuring the query updates all rows in the table.

Alternative Approach:

An alternative approach that also removes carriage return (r) characters is:

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

This approach uses nested REPLACE functions to successively remove both r and n characters from the log column.

Note:

• Always test such queries on a copy of your table or on a development environment to avoid data loss.
• Be aware that these queries will remove all occurrences of the specified characters, which may not be desirable in all cases.

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