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Mysql Error Illegal Mix Of Collations

dreaded illegal-mix-of-collations error. The occasional query would result in Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='. MySQL’s default character set

Mysql Illegal Mix Of Collations For Operation '='

is latin1 with an adventurous Swedish collation, which presumably seemed like a mysql illegal mix of collations (utf8_unicode_ci implicit) and (utf8_general_ci implicit) good idea at the time. However Rails uses UTF-8 everywhere and from time to time the two collations

Illegal Mix Of Collations (latin1_swedish_ci,implicit) And (utf8_general_ci,coercible)

collide. Fortunately this problem is not new and clever people have already solved it: see Getting out of MySQL Character Set Hell and Fixing a MySQL Character Encoding Mismatch. Those illegal mix of collations for operation 'like' two articles advise more or less the same process. Here I’m just jotting down some notes where I found something confusing or ambiguous in case I ever have to do this again. Order of events After exporting the data and hacking the dump file, I wasn’t sure whether to configure MySQL for UTF-8 and then import the data, or the other mysql illegal mix of collations for operation 'concat' way round. I chose to import the data and then configure MySQL to avoid double-encoding the data. It seems to have worked. It silently truncated all my accented text but I was able to fix that. Take stock First figure out where you stand. In MySQL do this: mysql> show variables like 'char%'; The result you want is this: +--------------------------+----------------------------+ | Variable_name | Value | +--------------------------+----------------------------+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | utf8 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | utf8 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | +--------------------------+----------------------------+ At this stage several of these values will be latin1. Similarly for collation: mysql> show variables like 'collation%'; +----------------------+-----------------+ | Variable_name | Value | +----------------------+-----------------+ | collation_connection | utf8_general_ci | | collation_database | utf8_general_ci | | collation_server | utf8_general_ci | +----------------------+-----------------+ The utf8_general_ci collation will do but ideally we want utf8_unicode_ci. The former basically ignores all accents: it treats ‘ΓΌ’ the same as ‘u’. The latter pays attention to accents; it’s a

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Mysql Cast Collation

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Illegal Mix Of Collations For Operation 'case'

Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Illegal mix of collations error in MySql up vote 25 down https://airbladesoftware.com/notes/fixing-mysql-illegal-mix-of-collations/ vote favorite 10 Just got this answer from a previous question and it works a treat! SELECT username, (SUM(rating)/COUNT(*)) as TheAverage, Count(*) as TheCount FROM ratings WHERE month='Aug' GROUP BY username HAVING TheCount > 4 ORDER BY TheAverage DESC, TheCount DESC But when I stick this extra bit in it gives this error: Documentation #1267 - Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (latin1_general_ci,IMPLICIT) for operation '=' SELECT username, http://stackoverflow.com/questions/1241856/illegal-mix-of-collations-error-in-mysql (SUM(rating)/COUNT(*)) as TheAverage, Count(*) as TheCount FROM ratings WHERE month='Aug' **AND username IN (SELECT username FROM users WHERE gender =1)** GROUP BY username HAVING TheCount > 4 ORDER BY TheAverage DESC, TheCount DESC The table is: id, username, rating, month mysql collation mysql-error-1267 share|improve this question edited Jun 27 '14 at 11:08 Rikesh 19k104266 asked Aug 6 '09 at 22:21 Oliver 2591718 add a comment| 15 Answers 15 active oldest votes up vote 7 down vote accepted Check the collation type of each table, and make sure that they have the same collation. After that check also the collation type of each table field that you have use in operation. I had encountered the same error, and that tricks works on me. share|improve this answer edited Jan 16 '12 at 13:12 bluish 9,4181269126 answered Sep 29 '09 at 10:01 1mr3yn add a comment| up vote 50 down vote Here's how to check which columns are the wrong collation: SELECT table_schema, table_name, column_name, character_set_name, collation_name FROM information_schema.columns WHERE collation_name = 'latin1_general_ci' ORDER BY table_schema, table_name,ordinal_position; And here's the query to fix it: ALTER TABLE tbl_name CONVERT TO CHARACTER SET latin1 COLLATE 'latin1_swedish_ci'; Link share|improve this answer edited Feb 6 '13 at 23:59 answered Apr 21

dreaded illegal-mix-of-collations error. The occasional query would result in Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for https://airbladesoftware.com/notes/fixing-mysql-illegal-mix-of-collations/ operation '='. MySQL’s default character set is latin1 with an adventurous Swedish collation, which presumably seemed like a good idea at the time. However Rails uses UTF-8 http://www.vbulletin.com/forum/forum/vbulletin-legacy-versions-products/legacy-vbulletin-versions/vbulletin-3-6-questions-problems-and-troubleshooting/199945-the-right-way-to-fix-the-illegal-mix-of-collations-problem everywhere and from time to time the two collations collide. Fortunately this problem is not new and clever people have already solved it: see Getting out of illegal mix MySQL Character Set Hell and Fixing a MySQL Character Encoding Mismatch. Those two articles advise more or less the same process. Here I’m just jotting down some notes where I found something confusing or ambiguous in case I ever have to do this again. Order of events After exporting the data and hacking the illegal mix of dump file, I wasn’t sure whether to configure MySQL for UTF-8 and then import the data, or the other way round. I chose to import the data and then configure MySQL to avoid double-encoding the data. It seems to have worked. It silently truncated all my accented text but I was able to fix that. Take stock First figure out where you stand. In MySQL do this: mysql> show variables like 'char%'; The result you want is this: +--------------------------+----------------------------+ | Variable_name | Value | +--------------------------+----------------------------+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | utf8 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | utf8 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | +--------------------------+----------------------------+ At this stage several of these values will be latin1. Similarly for collation: mysql> show variables like 'collation%'; +----------------------+-----------------+ | Variable_name | Value | +----------------------+-----------------+ | collation_connection | utf8_general_ci | | collation_database | utf8_ge

Read Home Forum vBulletin Legacy Versions & Products Legacy vBulletin Versions vBulletin 3.6 Questions, Problems and Troubleshooting Join us on Facebook, Twitter and YouTube. This section is an archive with no posting allowed. The software represented in this forum is no longer supported or updated. If you need help upgrading to a newer version of vBulletin please open a support ticket. You can also post in the section supporting the upgrade version you're planning to use. We are sorry for any inconvenience this may cause. Welcome to the vBulletin support forums! In the forums you can receive professional support and assistance with any issues you might have with your vBulletin Products. If you are having problems posting in the relevant areas for your software, please see this topic. Announcement Collapse No announcement yet. The right way to fix the (Illegal mix of collations) problem Collapse X Collapse Posts Latest Activity Search Page of 2 Filter Time All Time Today Last Week Last Month Show All Discussions only Photos only Videos only Links only Polls only Filtered by: Clear All new posts Previous 1 2 Next Mohamed Ashraf New Member Join Date: Jun 2006 Posts: 9 #1 The right way to fix the (Illegal mix of collations) problem Tue 8th Aug '06, 3:09pm Hello every body ,, I noticed that alot of people had the (Illegal mix of collations) problem ( me too ) , Code: Database error in vBulletin 3.6.0:Invalid SQL: SELECT cron.* FROM cron AS cron LEFT JOIN product AS product ON (cron.product = product.productid) WHERE cron.nextrun <= 1154876909 AND cron.active = 1 AND (product.productid IS NULL OR product.active = 1) ORDER BY cron.nextrun LIMIT 1;MySQL Error : Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and(latin1_general_ci,IMPLICIT) for operation '='Error Number : 1267 Date : Sunday, August 6th 2006 @ 06:08:29 PM Script : http://xxxxxxxxx/vb/cron.php?&rand=732223 Referrer : http://xxxxxxxxx/vb/forumdisplay.php?f=25 IP Address : xx.xxx.xxx.xxx Username : Classname : vb_database so here is the right way to fix it ,,, # first we have to know which Tables we have to work on it ,, in the message we can see [ LEFT JOIN product AS product ON (cron.product = product.productid) WHERE cron.nextr

 

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