MySQL REPLACE function
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MySQL always surprises me in the sheer amount of stuff you can do in it. For example I recently found it has a bunch of String Functions. The main one I found to be useful was the REPLACE function, which works like this:
REPLACE('Original String', 'Find This', 'Replace with this')
-- So it can be used like: --
SELECT REPLACE('My Original String', 'Original', 'Modified');
-- This will output: My Modified String --
-- So if you wanted to go through a full table and replace a bunch of strings, you could use it like this: --
UPDATE `table_name` SET `field_name` = REPLACE(`field_name`, 'Find Me', 'Replace with Me');