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https://dev.mysql.com/doc/refman/8.4/en/comparison-operators.html
If no AUTO_INCREMENT value was successfully inserted, the SELECT statement returns no row. The behavior of retrieving an AUTO_INCREMENT value by using an IS NULL comparison can be disabled by setting sql_auto_is_null = 0. Table 14.4 Comparison ...
https://dev.mysql.com/doc/refman/8.4/en/create-table-gipks.html
MySQL 8.4 supports generated invisible primary keys for any InnoDB table that is created without an explicit primary key. When the sql_generate_invisible_primary_key server system variable is set to ON, the MySQL server automatically adds a ...
https://dev.mysql.com/doc/refman/8.4/en/data-type-defaults.html
In the definition of an integer column, it is an alias for NOT NULL AUTO_INCREMENT UNIQUE. An expression default value cannot depend on a column that has the AUTO_INCREMENT attribute. Implicit defaults are defined as follows: For numeric types, the ... Data type specifications can have explicit or implicit default ...
https://dev.mysql.com/doc/refman/8.4/en/explain.html
In practice, the DESCRIBE keyword is more often used to obtain information about table structure, whereas EXPLAIN is used to obtain a query execution plan (that is, an explanation of how MySQL would execute a query). The following discussion uses ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-tables-table.html
The information_schema_stats_expiry system variable defines the period of time before cached table statistics expire. If there are no cached statistics or statistics have expired, statistics are retrieved from storage engines when querying table ...
https://dev.mysql.com/doc/refman/8.4/en/merge-storage-engine.html
The MERGE storage engine, also known as the MRG_MyISAM engine, is a collection of identical MyISAM tables that can be used as one. “Identical” means that all tables have identical column data types and index information. You cannot merge MyISAM ...
https://dev.mysql.com/doc/refman/8.4/en/myisamchk-other-options.html
--set-auto-increment[=value], -A[value] Force AUTO_INCREMENT numbering for new records to start at the given value (or higher, if there are existing records with AUTO_INCREMENT values this large). If value is not specified, AUTO_INCREMENT numbers ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-online-add-node-example.html
In this section we provide a detailed example illustrating how to add new NDB Cluster data nodes online, starting with an NDB Cluster having 2 data nodes in a single node group and concluding with a cluster having 4 data nodes in 2 node groups.
https://dev.mysql.com/doc/refman/8.4/en/mysql-nutshell.html
The use of the AUTO_INCREMENT modifier with FLOAT and DOUBLE columns in CREATE TABLE and ALTER TABLE statements was deprecated in MySQL 8.0; support for it is removed altogether in MySQL 8.4, where it raises ER_WRONG_FIELD_SPEC (Incorrect column ...
https://dev.mysql.com/doc/refman/8.4/en/numeric-type-syntax.html
SERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE. SERIAL DEFAULT VALUE in the definition of an integer column is an alias for NOT NULL AUTO_INCREMENT UNIQUE. SERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE.