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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-status-variable-tables.html
There are also summary tables that provide status variable information aggregated by account, host name, and user name. The Performance Schema supports TRUNCATE TABLE for status variable tables as follows: global_status: Resets thread, account, ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-summary-tables.html
Summary tables provide aggregated information for terminated events over time. The tables in this group summarize event data in different ways. Each summary table has grouping columns that determine how to group the data to be aggregated, and ...
https://dev.mysql.com/doc/refman/5.7/en/processlist-access.html
The sys schema session view presents information about user sessions like the sys schema processlist view, but with background processes filtered out. Privileges Required to Access the Process List For most sources of process information, if you ...
https://dev.mysql.com/doc/refman/5.7/en/select-into.html
For the INTO var_list variant: var_list names a list of one or more variables, each of which can be a user-defined variable, stored procedure or function parameter, or stored program local variable. INTO var_list statement, only user-defined ...INTO ...
https://dev.mysql.com/doc/refman/5.7/en/signal.html
To signal a generic SQLSTATE value, use '45000', which means “unhandled user-defined exception.” The SIGNAL statement optionally includes a SET clause that contains multiple signal items, in a list of condition_information_item_name = ...SIGNAL ...
https://dev.mysql.com/doc/refman/5.7/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/5.7/en/upgrade-binary-package.html
For example: mysqladmin -u root -p shutdown mysqld_safe --user=mysql --datadir=/path/to/existing-datadir & Logical Upgrade A logical upgrade involves exporting SQL from the old MySQL instance using a backup or export utility such as mysqldump or ...
https://dev.mysql.com/doc/refman/5.7/en/using-encrypted-connections.html
Suppose that you want to connect using an account that has no special encryption requirements or that was created using a CREATE USER statement that included the REQUIRE SSL clause. For additional information about the REQUIRE clause, see Section ...
https://dev.mysql.com/doc/refman/5.7/en/server-option-variable-reference.html
The following table lists all command-line options, system variables, and status variables applicable within mysqld. The table lists command-line options (Cmd-line), options valid in configuration files (Option file), server system variables ...
https://dev.mysql.com/doc/refman/5.7/en/windows-postinstallation.html
If necessary, initialize the data directory and create the MySQL grant tables. If you install MySQL using MySQL Installer, the root user is created automatically with the password you supplied. GUI tools exist that perform most of the tasks ...