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https://dev.mysql.com/doc/refman/5.7/en/user-variables.html
You can store a value in a user-defined variable in one statement and refer to it later in another statement. This enables you to pass values from one statement to another. User variables are written as @var_name, where the variable name var_name ...
https://dev.mysql.com/doc/refman/5.7/en/windows-select-server.html
Binary Description mysqld Optimized binary with named-pipe support mysqld-debug Like mysqld, but compiled with full debugging and automatic memory allocation checking All of the preceding binaries are optimized for modern Intel processors, but ...
https://dev.mysql.com/doc/refman/5.7/en/alter-function.html
ALTER FUNCTION func_name [characteristic ...] characteristic: { COMMENT 'string' | LANGUAGE SQL | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA } | SQL SECURITY { DEFINER | INVOKER } } This statement can be used to change the ...
https://dev.mysql.com/doc/refman/5.7/en/binlog.html
It is generated by the mysqlbinlog program as the printable representation of certain events in binary log files. (See Section 4.6.7, “mysqlbinlog — Utility for Processing Binary Log Files”.) The 'str' value is a base 64-encoded string the ...
https://dev.mysql.com/doc/refman/5.7/en/charset-collation-coercibility.html
In the great majority of statements, it is obvious what collation MySQL uses to resolve a comparison operation. For example, in the following cases, it should be clear that the collation is the collation of column x: SELECT x FROM T ORDER BY x; ...
https://dev.mysql.com/doc/refman/5.7/en/charset-connection.html
A “connection” is what a client program makes when it connects to the server, to begin a session within which it interacts with the server. The client sends SQL statements, such as queries, over the session connection. The server sends ...
https://dev.mysql.com/doc/refman/5.7/en/charset-errors.html
This section describes how the MySQL server uses character sets for constructing error messages. For information about the language of error messages (rather than the character set), see Section 10.12, “Setting the Error Message Language”. For ...
https://dev.mysql.com/doc/refman/5.7/en/charset-general.html
A character set is a set of symbols and encodings. A collation is a set of rules for comparing characters in a character set. Let's make the distinction clear with an example of an imaginary character set. Suppose that we have an alphabet with four ...
https://dev.mysql.com/doc/refman/5.7/en/column-indexes.html
The most common type of index involves a single column, storing copies of the values from that column in a data structure, allowing fast lookups for the rows with the corresponding column values. The B-tree data structure lets the index quickly ...
https://dev.mysql.com/doc/refman/5.7/en/commit.html
SET autocommit disables or enables the default autocommit mode for the current session. This means that, when not otherwise inside a transaction, each statement is atomic, as if it were surrounded by START TRANSACTION and COMMIT. You cannot use ...