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https://dev.mysql.com/doc/refman/8.0/en/sys-statement-analysis.html
db The default database for the statement, or NULL if there is none. err_count The total number of errors produced by occurrences of the statement. The statement_analysis and x$statement_analysis views have these columns: query The normalized ...
https://dev.mysql.com/doc/refman/8.0/en/sys-statements-with-runtimes-in-95th-percentile.html
db The default database for the statement, or NULL if there is none. err_count The total number of errors produced by occurrences of the statement. These views list statements with runtimes in the 95th percentile. The ...
https://dev.mysql.com/doc/refman/8.0/en/too-many-connections.html
If clients encounter Too many connections errors when attempting to connect to the mysqld server, all available connections are in use by other clients. The permitted number of connections is controlled by the max_connections system variable. The ...
https://dev.mysql.com/doc/refman/8.0/en/window-functions-named-windows.html
Windows can be defined and given names by which to refer to them in OVER clauses. If present in a query, the WINDOW clause falls between the positions of the HAVING and ORDER BY clauses, and has this syntax: WINDOW window_name AS (window_spec) [, ...
https://dev.mysql.com/doc/refman/8.0/en/windows-upgrading.html
For example, before upgrading from MySQL 5.7 to 8.0, use mysqladmin from MySQL 5.7 as follows: C:\> "C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqladmin" -u root shutdown Note If the MySQL root user account has a password, invoke mysqladmin with ... There are two approaches for upgrading MySQL on Windows: Using MySQL Installer Using the Windows ZIP archive distribution The approach you select depends on how the existing installation was ...
https://dev.mysql.com/doc/refman/8.0/en/working-with-null.html
A common error when working with NULL is to assume that it is not possible to insert a zero or an empty string into a column defined as NOT NULL, but this is not the case. The NULL value can be surprising until you get used to it. Conceptually, ...
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-options-variables.html
In this case, the server could also produce error messages for other X Plugin settings because it cannot recognize them. This section describes the command options and system variables that configure X Plugin, as well as the status variables ...
https://dev.mysql.com/doc/refman/8.0/en/linux-installation-juju.html
The Juju deployment framework supports easy installation and configuration of MySQL servers.
https://dev.mysql.com/doc/refman/8.0/en/platform-support.html
MySQL platform support evolves over time; please refer to https://www.mysql.com/support/supportedplatforms/database.html for the latest updates.
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-progress-reporting.html
The following sys schema views provide progress reporting for long-running transactions: processlist session x$processlist x$session Assuming that the required instruments and consumers are enabled, the progress column of these views shows the ...