sql - Illegal mix of collations MySQL Error

Question

I'm getting this strange error while processing a large number of data...

Error Number: 1267

Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='

SELECT COUNT(*) as num from keywords WHERE campaignId='12' AND LCASE(keyword)='hello again ??” ????‰ ????? ? ′?‰€'

What can I do to resolve this? Can I escape the string somehow so this error wouldn't occur, or do I need to change my table encoding somehow, and if so, what should I change it to?

Answer 1

SET collation_connection = 'utf8_general_ci';

then for your databases

ALTER DATABASE your_database_name CHARACTER SET utf8 COLLATE utf8_general_ci;

ALTER TABLE your_table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;

MySQL sneaks swedish in there sometimes for no sensible reason.