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https://dev.mysql.com/doc/refman/5.7/en/charset-restrictions.html
Identifiers are stored in mysql database tables (user, db, and so forth) using utf8, 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/5.7/en/charset-unicode-sets.html
In Japan, since the supplementary characters are obscure Kanji ideographs, the typical user does not care what order they are in, anyway. This section describes the collations available for Unicode character sets and their differentiating ...
https://dev.mysql.com/doc/refman/5.7/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/5.7/en/comments.html
(Under some conditions, nested comments might be permitted, but usually are not, and users should avoid them.) MySQL Server supports certain variants of C-style comments. MySQL Server supports three comment styles: From a # character to the end of ...
https://dev.mysql.com/doc/refman/5.7/en/commit.html
Rolling back can be a slow operation that may occur implicitly without the user having explicitly asked for it (for example, when an error occurs). SET autocommit disables or enables the default autocommit mode for the current session. This means ...
https://dev.mysql.com/doc/refman/5.7/en/common-errors.html
This section lists some errors that users frequently encounter when running MySQL programs. Although the problems show up when you try to run client programs, the solutions to many of the problems involves changing the configuration of the MySQL ...
https://dev.mysql.com/doc/refman/5.7/en/communication-errors.html
If the log_error_verbosity system variable is set to 3, you might find messages like this in your error log: [Note] Aborted connection 854 to db: 'employees' user: 'josh' If a client is unable even to connect, the server increments the ... If ...
https://dev.mysql.com/doc/refman/5.7/en/compatibility.html
We are not afraid to add extensions to SQL or support for non-SQL features if this greatly increases the usability of MySQL Server for a large segment of our user base. This section describes how MySQL relates to the ANSI/ISO SQL standards. MySQL ...
https://dev.mysql.com/doc/refman/5.7/en/connection-control-plugin.html
This capability provides a deterrent that slows down brute force attacks against MySQL user accounts. To collect information, it subscribes to the MYSQL_AUDIT_CONNECTION_CLASSMASK event class, and processes MYSQL_AUDIT_CONNECTION_CONNECT and ... As ...
https://dev.mysql.com/doc/refman/5.7/en/connectors-apis.html
Native drivers are also easier for end users to build and deploy because no copy of the MySQL client libraries is needed to build the native driver components. MySQL Connectors provide connectivity to the MySQL server for client programs. APIs ...