Finding duplicate values in MySQL

Question

I have a table with a varchar column, and I would like to find all the records that have duplicate values in this column. What is the best query I can use to find the duplic

Answer 1

Taking @maxyfc's answer further, I needed to find all of the rows that were returned with the duplicate values, so I could edit them in MySQL Workbench:

SELECT * FROM table
   WHERE field IN (
     SELECT field FROM table GROUP BY field HAVING count(*) > 1
   ) ORDER BY field