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https://dev.mysql.com/doc/refman/8.0/en/truncate-table.html
As of MySQL 8.0.21, if the tablespace was created with an earlier version and resides in an unknown directory, InnoDB creates the new tablespace in the default location and writes the following warning to the error log: The DATA DIRECTORY location ...Logically, TRUNCATE TABLE is similar to a DELETE statement that deletes all rows, or a sequence of DROP TABLE and CREATE TABLE ...
https://dev.mysql.com/doc/refman/8.0/en/type-conversion.html
When an operator is used with operands of different types, type conversion occurs to make the operands compatible. For example, MySQL automatically converts strings to numbers as necessary, and vice versa. mysql> SELECT 1+'1'; -> 2 mysql> SELECT ...
https://dev.mysql.com/doc/refman/8.0/en/uninstall-component.html
If any error occurs, the statement fails and has no effect. A component provides services that are available to the server and other components; see Section 7.5, “MySQL Components”. It requires the DELETE privilege for the mysql.component system ...
https://dev.mysql.com/doc/refman/8.0/en/uninstall-plugin.html
UNINSTALL PLUGIN plugin_name This statement removes an installed server plugin. It requires the DELETE privilege for the mysql.plugin system table because it removes the row from that table that registers the plugin. plugin_name must be the name of ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/en/using-system-variables.html
For example, the log_filter_dragnet error log filter component implements a system variable named log_error_filter_rules, the full name of which is dragnet.log_error_filter_rules. The MySQL server maintains many system variables that configure its ...
https://dev.mysql.com/doc/refman/8.0/en/values.html
The DEFAULT keyword is not supported by VALUES and causes a syntax error, except when it is used to supply values in an INSERT statement. VALUES is a DML statement introduced in MySQL 8.0.19 which returns a set of one or more rows as a table. In ...
https://dev.mysql.com/doc/refman/8.0/en/version-tokens.html
An SQL statement sent by the application to a server not in the required state produces an error. MySQL includes Version Tokens, a feature that enables creation of and synchronization around server tokens that applications can use to prevent ...
https://dev.mysql.com/doc/refman/8.0/en/what-is-crashing.html
Use the “copy and paste” method for any output and error messages from programs and log files. This can normally be checked by pressing the Caps Lock key. If the Caps Lock light does not change, you have to replace your keyboard. (Before doing ...
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) [, ...