Phpmyadmin which collation

You can simply run the query below in phpMyadmin directly. This query will show the list of all the databases with their respective charset and collation. I have as make a highlight for this database in the picture above. Now I am executing the query below. Now you can see the list with the previous query again. I have dumped some tables from another database to this one.

I am showing the result of this query in the image below query. In the operations done above, I have changed collations and encoding for brands and categories tables. As only these columns will get affected by such operations. These are the columns that store text values like varchar, text, etc. The query to do so is below:. Share this article. Column Character Set Conversion.

Character Set and Collation Compatibility. Collation Coercibility in Expressions. Examples of the Effect of Collation. The utf8 Character Set Alias for utf8mb3. Supported Character Sets and Collations. Central European Character Sets.

Restrictions on Character Sets. Setting the Error Message Language. Adding a Collation to a Character Set. Collation Implementation Types. Choosing a Collation ID. Diagnostics During Index. Character Set Configuration. InnoDB Cluster. InnoDB ReplicaSet. Error Messages and Common Problems.

MySQL 8. For an overview of the sane options: monolune. Add a comment. Active Oldest Votes. Improve this answer. Overflowh 1, 6 6 gold badges 18 18 silver badges 40 40 bronze badges. Eran Galperin Eran Galperin Also, there are no concrete numbers or benchmarks so you are just basing it on the opinion of the writer. These give you the rest of Chinese, plus improved collation. Show 4 more comments. SiHa 6, 12 12 gold badges 28 28 silver badges 40 40 bronze badges.

Vegard Larsen Vegard Larsen I like your explaination! Good one. But I need better understanding on exactly why unicode sort order is better way to sort correctly than stripping away accents. Adam It really depends on your target audience. Sorting is a tricky problem to localize correctly. This sort order is different in almost any language, e.

Unicode fixes this. So what I am basically saying, is that you should probably use a language-specific sort if you can, but in most cases that is unfeasible, so go for Unicode general sorting. The collation is just about what characters are considered equal, and how they're ordered. Show 5 more comments. The script below describes the problem by example. Shiwangini 8 8 silver badges 23 23 bronze badges. Guus Guus 2, 2 2 gold badges 20 20 silver badges 30 30 bronze badges. You would see the same behaviour if the two values were 'value' and 'valUe'.

The whole point of a collation is that it provides rules for among other things when two strings are considered equal to one another. That's exactly the problem that I'm trying to illustrate - the collation makes two things equal while they in fact are not intended to be equal at all and thus, a unique constraint is exactly the opposite of what you'd want to achive — Guus.

But you describe it as a "problem" and leading to "bugs" when the behaviour is exactly what a collation is intended to achieve. Your description is correct, but only in as much as it is an error on the part of the DBA to select an inappropriate collation. The thing is that, when you enter two usernames that are considered equal by the collation, it will not be allowed if you set the coloumn username to be unique, which you should of course do!

I upvoted both this answer and Hammerite's comment, because both of them combined helped me reach an understanding of collation. Show 2 more comments. The utf8mb4 character set was introduced in MySQL 5. Some of the required changes to use the new character set are not trivial: Changes may need to be made in your application database adapter. Changes will need to be made to my. Barracuda supports dynamic row formats, which you will need if you do not want to hit the SQL errors for creating indexes and keys after you switch to the charset: utf8mb4 - Index column size too large.