What collation should I use in MySQL?

What collation should I use in MySQL?

It is best to use character set utf8mb4 with the collation utf8mb4_unicode_ci . The character set, utf8 , only supports a small amount of UTF-8 code points, about 6% of possible characters. utf8 only supports the Basic Multilingual Plane (BMP).

What is the default collation for MySQL?

MySQL uses the latin1 as the default character set. Therefore, the default collation is latin1_swedish_ci . You can change these settings at server startup. If you specify one character set at server startup, MySQL will use the default collation of that character set.

What is utf8 collation in MySQL?

utf8_general_ci is a legacy collation that does not support expansions, contractions, or ignorable characters. It can make only one-to-one comparisons between characters. MySQL implements utf8 language-specific collations if the ordering with utf8_unicode_ci does not work well for a language.

What is the difference between utf8 and latin1?

what is the difference between utf8 and latin1? They are different encodings (with some characters mapped to common byte sequences, e.g. the ASCII characters and many accented letters). UTF-8 is one encoding of Unicode with all its codepoints; Latin1 encodes less than 256 characters.

Which collation is utf8mb4?

From MySQL 8.0, utf8mb4 is the default character set, and the default collation for utf8mb4 is utf8mb4_0900_ai_ci. MySQL 8.0 is also coming with a whole new set of Unicode collations for the utf8mb4 character set. This will allow use of the complete Unicode 9.0.

What is the difference between UTF-8 and latin1?

How do I convert MySQL to utf8mb4?

Switching from MySQL’s utf8 to utf8mb4

1. Step 1: Create a backup.
2. Step 2: Upgrade the MySQL server.
3. Step 3: Modify databases, tables, and columns.
4. Step 4: Check the maximum length of columns and index keys.
5. Step 5: Modify connection, client, and server character sets.
6. Step 6: Repair and optimize all tables.

Should I use UTF-8 or UTF 16?

Depends on the language of your data. If your data is mostly in western languages and you want to reduce the amount of storage needed, go with UTF-8 as for those languages it will take about half the storage of UTF-16.

Does UTF-8 support Latin1?

2 Answers. UTF-8 is prepared for world domination, Latin1 isn’t. If you’re trying to store non-Latin characters like Chinese, Japanese, Hebrew, Russian, etc using Latin1 encoding, then they will end up as mojibake.

What is the best collation to use for MySQL with PHP?

Because utf8_general_ci is the default collation for Unicode in MySQL, if you want to use utf8_unicode_ci then you end up having to specify it in a lot of places. For example, all client connections not only have a default charset (makes sense to me)…

Where can I set a collation in MySQL?

As you can see above there are several places where you can set collations, each of these collations need to be able to support the data you are sending it.

When to use collation in a database adapter?

In your database adapter, you may want to set the charset and collation for your connection: Collations affect how data is sorted and how strings are compared to each other. That means you should use the collation that most of your users expect. Example from the documentation for charset unicode:

Can you use UTF8 general collation in MySQL?

Be very, very aware of this problem that can occur when using utf8_general_ci. MySQL will not distinguish between some characters in select statements, if the utf8_general_ci collation is used. This can lead to very nasty bugs – especially for example, where usernames are involved.