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https://dev.mysql.com/doc/refman/8.0/en/problems-connecting.html
is not allowed to connect to this MySQL server You can fix this by setting up an account for the combination of client host name and user name that you are using when trying to connect. If you cannot figure out why you get Access denied, remove from ... If you encounter problems when you try to connect to the MySQL server, the following items describe some courses of action you can take to correct the ...
https://dev.mysql.com/doc/refman/8.0/en/problems-with-alias.html
In the select list of a query, a quoted column alias can be specified using identifier or string quoting characters: SELECT 1 AS `one`, 2 AS 'two'; Elsewhere in the statement, quoted references to the alias must use identifier quoting or the ... An ...
https://dev.mysql.com/doc/refman/8.0/en/problems-with-mysql-sock.html
If the last permission character is t, the bit is set. The default location for the Unix socket file that the server uses for communication with local clients is /tmp/mysql.sock. (For some distribution formats, the directory might be different, ...
https://dev.mysql.com/doc/refman/8.0/en/processlist-access.html
Note As of MySQL 8.0.22, an alternative implementation for SHOW PROCESSLIST is available based on the Performance Schema processlist table, which, like the threads table, does not require a mutex and has better performance characteristics. For SHOW ... The following discussion enumerates the sources of process information, the privileges required to see process information, and describes the content of process list ...
https://dev.mysql.com/doc/refman/8.0/en/query-attributes.html
Query attribute names are transmitted using the character set indicated by the character_set_client system variable. The most visible part of an SQL statement is the text of the statement. As of MySQL 8.0.23, clients can also define query ...
https://dev.mysql.com/doc/refman/8.0/en/range-optimization.html
Additionally, for BTREE indexes, comparison of a key part with a constant value is a range condition when using the >, <, >=, <=, BETWEEN, !=, or <> operators, or LIKE comparisons if the argument to LIKE is a constant string that does not start with ... The range access method uses a single index to retrieve a subset of table rows that are contained within one or several index value ...
https://dev.mysql.com/doc/refman/8.0/en/reloading-sql-format-dumps.html
To reload a dump file written by mysqldump that consists of SQL statements, use it as input to the mysql client.
https://dev.mysql.com/doc/refman/8.0/en/replication-compatibility.html
For example, foreign key names longer than 64 characters are no longer supported from MySQL 8.0. MySQL supports replication from one release series to the next higher release series. For example, you can replicate from a source running MySQL 5.6 to ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-reserved-words.html
In any SQL statements using these database object names, write the names as quoted identifiers using backtick characters (`). You can encounter problems when you attempt to replicate from an older source to a newer replica and you make use of ...
https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-concepts.html
A GTID is represented as a pair of coordinates, separated by a colon character (:), as shown here: GTID = source_id:transaction_id The source_id identifies the originating server. A global transaction identifier (GTID) is a unique identifier ...