SQL statement to remove part of a string [duplicate]

Answer 1

update TABLE_NAME set FIELD_NAME = replace(FIELD_NAME, ‘find this string’, ‘replace found string with this string’) where CONDITION

Answer 2

Have a look at the REPLACE function. You'll need to use it twice to remove both http and https.

UPDATE    list
SET       website = REPLACE(REPLACE(website, 'https://', ''), 'http://', '')
WHERE     website like 'https://%' 
  OR      website like 'http://%'

To handle trailing slashes, you can use the RIGHT, LEFT, and LENGTH functions.

UPDATE    list
SET       website = LEFT(website, LENGTH(website) - 1)
WHERE     RIGHT(website, 1) = '/'

Here is some documentation that you may find useful: MySQL string functions

Answer 3

Why not just replace the string if it exists:

UPDATE list
SET    website = Replace(website, 'http://', '')