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https://dev.mysql.com/doc/refman/8.4/en/mysqldump-delimited-text.html
The .sql file contains a CREATE TABLE statement for the table. This section describes how to use mysqldump to create delimited-text dump files. For information about reloading such dump files, see Section 9.4.4, “Reloading Delimited-Text Format ...
https://dev.mysql.com/doc/refman/8.4/en/mysqldumpslow.html
The MySQL slow query log contains information about queries that take a long time to execute (see Section 7.4.5, “The Slow Query Log”). mysqldumpslow parses MySQL slow query log files and summarizes their contents. Normally, mysqldumpslow ...
https://dev.mysql.com/doc/refman/8.4/en/nonpersistible-system-variables.html
SET PERSIST and SET PERSIST_ONLY enable global system variables to be persisted to the mysqld-auto.cnf option file in the data directory (see Section 15.7.6.1, “SET Syntax for Variable Assignment”). However, not all system variables can be ...
https://dev.mysql.com/doc/refman/8.4/en/null-values.html
The NULL value means “no data.” NULL can be written in any lettercase. Be aware that the NULL value is different from values such as 0 for numeric types or the empty string for string types. For text file import or export operations performed ...
https://dev.mysql.com/doc/refman/8.4/en/numeric-type-syntax.html
For integer data types, M indicates the minimum display width. Display width is unrelated to the range of values a type can store, as described in Section 13.1.6, “Numeric Type Attributes”. For floating-point and fixed-point data types, M is ...
https://dev.mysql.com/doc/refman/8.4/en/obtaining-component-information.html
The component_urn is the URN used in INSTALL COMPONENT and UNINSTALL COMPONENT statements to load and unload the component. The mysql.component system table contains information about currently loaded components and shows which components have been ...
https://dev.mysql.com/doc/refman/8.4/en/optimization.html
Depending on your job role (developer, DBA, or a combination of both), you might optimize at the level of individual SQL statements, entire applications, a single database server, or multiple networked database servers. This chapter explains how to ...
https://dev.mysql.com/doc/refman/8.4/en/optimizer-features-to-trace.html
Some features in the optimizer can be invoked many times during statement optimization and execution, and thus can make the trace grow beyond reason. They are: Greedy search: With an N-table join, this could explore factorial(N) plans. Range ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-server.html
This section discusses optimization techniques for the database server, primarily dealing with system configuration rather than tuning SQL statements. The information in this section is appropriate for DBAs who want to ensure performance and ...
https://dev.mysql.com/doc/refman/8.4/en/other-vendor-data-types.html
If you create a table with types used by other vendors and then issue a DESCRIBE tbl_name statement, MySQL reports the table structure using the equivalent MySQL types. To facilitate the use of code written for SQL implementations from other ...