mysql: How can I remove character at start or end of field

Question

I have field that contains a comma-separated list. Some old records have a comma at the beginning or end of the field. I need to remove these extra commas.

Example:<

Answer 1

The question was how to remove the leading and trailing characters I will show you an example with an update query.

UPDATE your_table_name
SET your_record_name = TRIM(BOTH ',' FROM your_record_name)