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https://dev.mysql.com/doc/refman/8.4/en/error-log-format.html
Each error log sink (writer) component has a characteristic output format it uses to write messages to its destination, but other factors may influence the content of the messages: The information available to the log sink. If a log filter ...
https://dev.mysql.com/doc/refman/8.4/en/error-message-elements.html
This section discusses how error messages originate within MySQL and the elements they contain. The MySQL server writes some error messages to its error log. These indicate issues of interest to database administrators or that require DBA action.
https://dev.mysql.com/doc/refman/8.4/en/example-foreign-keys.html
MySQL supports foreign keys, which permit cross-referencing related data across tables, and foreign key constraints, which help keep the related data consistent. A foreign key relationship involves a parent table that holds the initial column ...
https://dev.mysql.com/doc/refman/8.4/en/example-user-variables.html
You can employ MySQL user variables to remember results without having to store them in temporary variables in the client.
https://dev.mysql.com/doc/refman/8.4/en/examples.html
Here are examples of how to solve some common problems with MySQL. Some of the examples use the table shop to hold the price of each article (item number) for certain traders (dealers). Supposing that each trader has a single fixed price per ...
https://dev.mysql.com/doc/refman/8.4/en/expired-password-handling.html
mysql> SELECT 1; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. MySQL provides password-expiration capability, which enables database administrators to require that users reset their ...
https://dev.mysql.com/doc/refman/8.4/en/features.html
Statements and Functions Full operator and function support in the SELECT list and WHERE clause of queries. For example: mysql> SELECT CONCAT(first_name, ' ', last_name) -> FROM citizen -> WHERE income/dependents > 10000 AND age > 30; Full support ... This section describes some of the important characteristics of the MySQL Database ...
https://dev.mysql.com/doc/refman/8.4/en/fractional-seconds.html
MySQL has fractional seconds support for TIME, DATETIME, and TIMESTAMP values, with up to microseconds (6 digits) precision: To define a column that includes a fractional seconds part, use the syntax type_name(fsp), where type_name is TIME, ...
https://dev.mysql.com/doc/refman/8.4/en/fulltext-query-expansion.html
The following example shows this difference: mysql> SELECT * FROM articles WHERE MATCH (title,body) AGAINST ('database' IN NATURAL LANGUAGE MODE); +----+-------------------+------------------------------------------+ | id | title | body | ...
https://dev.mysql.com/doc/refman/8.4/en/fulltext-stopwords.html
The stopword list is loaded and searched for full-text queries using the server character set and collation (the values of the character_set_server and collation_server system variables). False hits or misses might occur for stopword lookups if the ...