Frequent question: Does MySQL use utf8?

How do I set MySQL to UTF-8?

To change the character set encoding to UTF-8 for the database itself, type the following command at the mysql> prompt. Replace dbname with the database name: ALTER DATABASE dbname CHARACTER SET utf8 COLLATE utf8_general_ci; To exit the mysql program, type q at the mysql> prompt.

Should I use UTF-8 or utf8mb4?

For the foreseeable future you need to use utf8mb4 to ensure correct UTF-8 encoding. After sufficient time has passed, the current utf8 will be removed, and at some future date utf8 will rise again, this time referring to the fixed version, though utf8mb4 will continue to unambiguously refer to the fixed version.

What character set does MySQL use?

The default MySQL server character set and collation are utf8mb4 and utf8mb4_0900_ai_ci , but you can specify character sets at the server, database, table, column, and string literal levels.

What is encoding in MySQL?

The MySQL ENCODE() function is used for encoding a plain text string. The MySQL ENCODE() function returns a binary string which of the same size of the plain text string. … The ENCODE() function accepts two parameters which are the string to be encoded and the key string to encode the plain text string.

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Why MyISAM gives the best performance?

MyISAM is designed with the idea that your database is queried far more than its updated and as a result it performs very fast read operations. If your read to write(insert|update) ratio is less than 15% its better to use MyISAM.

What is the difference between UTF-8 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.

What does utf8mb4 stand for?

In short: MySQL’s “utf8mb4” means “UTF-8”. MySQL’s “utf8” means “a proprietary character encoding”. This encoding can’t encode many Unicode characters.

Is UTF-8 and ascii same?

UTF-8 encodes Unicode characters into a sequence of 8-bit bytes. … Each 8-bit extension to ASCII differs from the rest. For characters represented by the 7-bit ASCII character codes, the UTF-8 representation is exactly equivalent to ASCII, allowing transparent round trip migration.

Is a UTF-8 character?

UTF-8 is a variable-width character encoding used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode (or Universal Coded Character Set) Transformation Format – 8-bit.

UTF-8.

Standard Unicode Standard
Transforms / Encodes ISO 10646 (Unicode)
Preceded by UTF-1
v t e

What is default collation in MySQL?

The default MySQL server character set and collation are latin1 and latin1_swedish_ci , but you can specify character sets at the server, database, table, column, and string literal levels.

What is the difference between utf8 and utf8mb4?

The difference between utf8 and utf8mb4 is that the former can only store 3 byte characters, while the latter can store 4 byte characters. In Unicode terms, utf8 can only store characters in the Basic Multilingual Plane, while utf8mb4 can store any Unicode character.

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What is the best collation for 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).