Mysql Error 1271
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Illegal Mix Of Collations For Operation 'union' In Mysql
About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or mysql union different collations posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of illegal mix of collations for operation 'union' sql injection 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up SQL error: #1271 - Illegal mix of collations for operation 'UNION' up vote 0 down vote favorite 1 I am trying to UNION comments and posts from Drupal and phpBB tables. This is my SQL: ( SELECT
Illegal Mix Of Collations For Operation In
f.forum_name AS section, p.topic_id, p.forum_id, p.post_id, p.poster_id AS uid, u.username AS user, p.post_time AS post_time, p.post_subject AS subject FROM phpbb_posts p JOIN phpbb_forums f ON f.forum_id = p.forum_id JOIN phpbb_topics t ON p.post_id = t.topic_last_post_id JOIN phpbb_users u ON p.poster_id = u.user_id ) UNION ( SELECT NULL AS section, comments.nid AS topic_id, NULL AS forum_id, comments.cid AS post_id, comments.uid AS uid, comments.name AS user, comments.timestamp AS post_time, comments.subject AS subject FROM dr_node node LEFT JOIN dr_comments comments ON node.nid = comments.nid WHERE node.status =1 ) ORDER BY post_time DESC LIMIT 7 and it gives me error: #1271 - Illegal mix of collations for operation 'UNION' Where is the problem? Thanks for your help. EDIT: I have just founded solution. Problem was with subject column. I added COLLATE utf8_unicode_ci to the subject in the second SELECT. ( SELECT f.forum_name AS section, p.topic_id, p.forum_id, p.post_id, p.poster_id AS uid, u.username AS user, p.post_time AS post_time, p.post_subject AS subject FROM phpbb_posts p JOIN phpbb_forums
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a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up #1271 - Illegal mix of collations for operation 'UNION' up vote 2 down http://stackoverflow.com/questions/21646308/sql-error-1271-illegal-mix-of-collations-for-operation-union vote favorite SELECT tbl_town.area_id, tbl_town.area_name FROM tbl_town WHERE city_id = 1 UNION SELECT CONCAT( tbl_town.area_id, '-', tbl_town_phase.town_phase_id ), CONCAT( tbl_town.area_name, '-', tbl_town_phase.town_phase_name ) FROM tbl_town, tbl_town_phase WHERE tbl_town.area_id = tbl_town_phase.town_id AND tbl_town.city_id = 1 UNION SELECT CONCAT( tbl_town.area_id, '-', tbl_town_phase.town_phase_id, '-', tbl_town_block.town_block_id ), CONCAT( tbl_town.area_name, '-', tbl_town_phase.town_phase_name, '-', tbl_town_block.town_block_name ) FROM tbl_town, tbl_town_phase, tbl_town_block WHERE tbl_town.area_id = tbl_town_phase.town_id AND tbl_town_phase.town_phase_id = tbl_town_block.town_phase_id AND tbl_town.city_id =1 LIMIT 0 , 30 MySQL http://stackoverflow.com/questions/22928789/1271-illegal-mix-of-collations-for-operation-union said: Documentation #1271 - Illegal mix of collations for operation 'UNION mysql sql collation share|improve this question edited Apr 8 '14 at 6:23 Martin Prikryl 34.7k1549135 asked Apr 8 '14 at 6:05 WebDeveloper 1113 you have to have identical queries.. meaning the number of columns and tables have to be the same.. you have three tables in one and two in the other, with additional stuff in the select. thats why you're getting the error.. make the queries return the same number of rows/columns and join the same number of tables and the error should go away –John Ruddell Apr 8 '14 at 6:19 add a comment| 3 Answers 3 active oldest votes up vote 1 down vote I have had a similar problem in the past. It's caused by mix of collations, most likely cause by differing column collations or default collation for strings. This is what you you can try check that the collation is the same for all columns check that the collation for your database is the same as your columns cast all your columns to the same collation as your database and run your script - then remove the collations in your query to find which column is causing the pr
2012 5:17 Reporter: Richard Teubel Email Updates: Status: https://bugs.mysql.com/bug.php?id=57926 Not a Bug Impact on me: None Category:MySQL https://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html Server: General Severity:S3 (Non-critical) Version:5.1.51, 5.1.52 OS:Any Assigned to: Assigned Account Tags: Collations, concat, Concat_WS, FUNCTION, Latin1, UNION Triage: Triaged: D3 (Medium) View Add Comment Files Developer Edit Submission View Progress Log Contributions illegal mix [2 Nov 2010 12:54] Richard Teubel Description: Hello, I have a latin1 environment and use a function which return latin1 varchar in a CONCAT_WS or CONCAT. One SELECT works fine but a UNION-Select fails. I get ERROR 1271 mysql> SELECT CONCAT_WS(' - illegal mix of ', getText(), getText()) UNION SELECT CONCAT_WS(' - ', getText(), getText(), getText()); ERROR 1271 (HY000): Illegal mix of collations for operation 'UNION' I think it's in the separator of CONCAT_WS. Convert to latin1 works fine. But it's a workaround! mysql> SELECT CONCAT_WS(_latin1' - ', getText(), getText()) UNION SELECT CONCAT_WS(_latin1' - ', getText(), getText(), getText()); +-----------------------------------------------+ | CONCAT_WS(_latin1' - ', getText(), getText()) | +-----------------------------------------------+ | Testtext - Testtext | | Testtext - Testtext - Testtext | +-----------------------------------------------+ How to repeat: CREATE DATABASE `concattestdb` DEFAULT CHARACTER SET latin1 COLLATE latin1_german2_ci; use concattestdb; SET CHARACTER SET 'latin1'; SET collation_connection=latin1_german2_ci; mysql> SHOW VARIABLES LIKE 'character_set%'; +--------------------------+--------------------------------------------------------------+ | Variable_name | Value | +--------------------------------------------------------------+ | character_set_client | latin1 | | character_set_connection | latin1 | | character_set_database | latin1 | | character_set_file
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