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https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf16.html
The utf16 character set is the ucs2 character set with an extension that enables encoding of supplementary characters: For a BMP character, utf16 and ucs2 have identical storage characteristics: same code values, same encoding, same length. For a ...
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/server-system-variables.html
OFF signals a termination of the background thread, which waits for it to end. The background thread checks the termination flag before accessing the queue to check for tasks to execute. The destination for log output is controlled by the log_output ... The MySQL server maintains many system variables that affect its ...
https://dev.mysql.com/doc/refman/8.0/en/string-functions-charset.html
MySQL has many operators and functions that return a string. This section answers the question: What is the character set and collation of such a string? For simple functions that take string input and return a string result as output, the output's ...
https://dev.mysql.com/doc/refman/8.0/en/load-data.html
The file can be read from the server host or the client host, depending on whether the LOCAL modifier is given. INTO Statement”.) To write data from a table to a file, use SELECT ... To read the file back into a table, use LOAD DATA. The syntax of ...
https://dev.mysql.com/doc/refman/8.0/en/charset-restrictions.html
Identifiers are stored in mysql database tables (user, db, and so forth) using utf8mb3, but identifiers can contain only characters in the Basic Multilingual Plane (BMP). The ucs2, utf16, utf16le, and utf32 character sets have the following ...
https://dev.mysql.com/doc/refman/8.0/en/charset-syntax.html
There are default settings for character sets and collations at four levels: server, database, table, and column. The description in the following sections may appear complex, but it has been found in practice that multiple-level defaulting leads ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf32.html
The utf32 character set is fixed length (like ucs2 and unlike utf16). utf32 uses 32 bits for every character, unlike ucs2 (which uses 16 bits for every character), and unlike utf16 (which uses 16 bits for some characters and 32 bits for others).
https://dev.mysql.com/doc/refman/8.0/en/information-schema-character-sets-table.html
The CHARACTER_SETS table has these columns: CHARACTER_SET_NAME The character set name. MAXLEN The maximum number of bytes required to store one character. Notes Character set information is also available from the SHOW CHARACTER SET statement. The ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-ucs2.html
Note The ucs2 character set is deprecated in MySQL 8.0.28; expect it to be removed in a future MySQL release. In UCS-2, every character is represented by a 2-byte Unicode code with the most significant byte first. For example: LATIN CAPITAL LETTER ...