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https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf8mb3.html
The utf8mb3 character set has these characteristics: Supports BMP characters only (no support for supplementary characters) Requires a maximum of three bytes per multibyte character. Applications that use UTF-8 data but require supplementary ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf8mb4.html
The utf8mb4 character set has these characteristics: Supports BMP and supplementary characters. utf8mb4 contrasts with the utf8mb3 character set, which supports only BMP characters and uses a maximum of three bytes per character: For a BMP ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode.html
The Unicode Standard includes characters from the Basic Multilingual Plane (BMP) and supplementary characters that lie outside the BMP. For information about the Unicode Standard itself, visit the Unicode Consortium website. BMP characters have ...
https://dev.mysql.com/doc/refman/8.0/en/charset-we-sets.html
Western European character sets cover most West European languages, such as French, Spanish, Catalan, Basque, Portuguese, Italian, Albanian, Dutch, German, Danish, Swedish, Norwegian, Finnish, Faroese, Icelandic, Irish, Scottish, and English. ascii ...
https://dev.mysql.com/doc/refman/8.0/en/charset.html
MySQL includes character set support that enables you to store data using a variety of character sets and perform comparisons according to a variety of collations. The default MySQL server character set and collation are utf8mb4 and ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-charset.html
The following applies to replication between MySQL servers that use different character sets: If the source has databases with a character set different from the global character_set_server value, you should design your CREATE TABLE statements so ...
https://dev.mysql.com/doc/refman/8.0/en/adding-collation-simple-8bit.html
This section describes how to add a simple collation for an 8-bit character set by writing the <collation> elements associated with a <charset> character set description in the MySQL Index.xml file. The example adds a collation named latin1_test_ci ...
https://dev.mysql.com/doc/refman/8.0/en/bit-value-literals.html
A leading 0b is case-sensitive and cannot be written as 0B. In numeric contexts, MySQL treats a bit literal like an integer. To ensure numeric treatment of a bit literal, use it in numeric context. For example, a bit literal assigned to a ...
https://dev.mysql.com/doc/refman/8.0/en/hexadecimal-literals.html
Hexadecimal literal values are written using X'val' or 0xval notation, where val contains hexadecimal digits (0..9, A..F). Lettercase of the digits and of any leading X does not matter. A leading 0x is case-sensitive and cannot be written as 0X.
https://dev.mysql.com/doc/refman/8.0/en/ldml-collation-example.html
To add a UCA collation for a Unicode character set without recompiling MySQL, use the following procedure. If you are unfamiliar with the LDML rules used to describe the collation's sort characteristics, see Section 12.14.4.2, “LDML Syntax ...