CODEWITHSUNDEEP
mysqlunicodecollation
Qiao
Qiao

Reputation: 17049

Select characters like ù

There is a table with 2 records - u and ù:

CREATE TABLE `tbl` (`text` text NOT NULL) ENGINE=MyISAM DEFAULT CHARSET=utf8;
INSERT INTO `tbl` (`text`) VALUES ('u'), ('ù');

I want to select row with ù:

SELECT * FROM `tbl` WHERE `text` = 'ù';

The result is 

+------+
| text |
+------+
| u    |
| ù    |
+------+

What is the problem here? How can I work with such characters?

Upvotes: 2

Views: 107

Answers (1)

chooban
chooban

Reputation: 9256

This is to do with the collation used when mysql compares values. If you run the following query, you'll see which collation is in effect:

show collation where Charset = 'utf8';

One of those should have a Default value of yes. In my case it's utf8_general_ci. This collation uses Unicode ordering to equate characters with accents and those without.

If you run the following query:

SELECT * FROM `tbl` WHERE `text` = 'ù' collate utf8_bin;

Then you'll only get one row back. There's a lot more information in the MySQL documentation.

Upvotes: 4

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