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https://dev.mysql.com/doc/refman/8.0/en/tuning-trace-purging.html
A subsequent SELECT from the OPTIMIZER_TRACE table returns the first limit traces of the offset oldest stored traces (if offset >= 0), or the first limit traces of the -offset newest stored traces (if offset < 0). Thus, if a statement contains ...
https://dev.mysql.com/doc/refman/8.0/en/tutorial.html
If you are interested only in accessing an existing database, you may want to skip the sections that describe how to create the database and the tables it contains. This chapter provides a tutorial introduction to MySQL by showing how to use the ...
https://dev.mysql.com/doc/refman/8.0/en/updating-yum-repo.html
Upgrading MySQL Upgrade MySQL and its components by the following command, for platforms that are not dnf-enabled: sudo yum update mysql-server For platforms that are dnf-enabled: sudo dnf upgrade mysql-server Alternatively, you can update MySQL by ... For supported Yum-based platforms (see Section 2.5.1, “Installing MySQL on Linux Using the MySQL Yum Repository”, for a list), you can perform an in-place upgrade for MySQL (that is, replacing the old version and then running the new version using the old data files) with the MySQL Yum ...
https://dev.mysql.com/doc/refman/8.0/en/verifying-index-usage.html
Always check whether all your queries really use the indexes that you have created in the tables. Use the EXPLAIN statement, as described in Section 10.8.1, “Optimizing Queries with EXPLAIN”.
https://dev.mysql.com/doc/refman/8.0/en/views.html
Views are stored queries that when invoked produce a result set. The following discussion describes the syntax for creating and dropping views, and shows some examples of how to use them. Additional Resources You may find the MySQL User Forums ...
https://dev.mysql.com/doc/refman/8.0/en/window-function-optimization.html
Window functions affect the strategies the optimizer considers: Derived table merging for a subquery is disabled if the subquery has window functions. Semijoins are not applicable to window function optimization because semijoins apply to ...
https://dev.mysql.com/doc/refman/8.0/en/windows-create-option-file.html
To initialize a MySQL installation by creating the data directory and populating the tables in the mysql system database, initialize MySQL using either --initialize or --initialize-insecure. If you need to specify startup options when you run the ...
https://dev.mysql.com/doc/refman/8.0/en/windows-select-server.html
The following table shows the available servers for Windows in MySQL 8.0. 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 ...
https://dev.mysql.com/doc/refman/8.0/en/windows-server-first-start.html
Note The initial root account in the MySQL grant tables has no password. This section gives a general overview of starting the MySQL server. The following sections provide more specific information for starting the MySQL server from the command ...
https://dev.mysql.com/doc/refman/8.0/en/constraint-invalid-data.html
It is possible to alter this behavior to be more forgiving of invalid values, such that the server coerces them to valid ones for data entry, by disabling strict SQL mode (see Section 7.1.11, “Server SQL Modes”), but this is not recommended. By ...