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https://dev.mysql.com/doc/refman/8.0/en/replication-features-json.html
Before MySQL 8.0, an update to a JSON column was always written to the binary log as the complete document. In MySQL 8.0, it is possible to log partial updates to JSON documents (see Partial Updates of JSON Values), which is more efficient. Servers ...The logging behavior depends on the format used, as described here: Statement-based ...
https://dev.mysql.com/doc/refman/8.0/en/replication-threads.html
MySQL replication capabilities are implemented using the following types of threads: Binary log dump thread. When replica_parallel_workers (in MySQL 8.0.26 and earlier, use slave_parallel_workers) is equal to 0, the replica creates an SQL (applier) ...The source creates a thread to send the binary log contents to a replica when the replica ...
https://dev.mysql.com/doc/refman/8.0/en/reset-master.html
Note This statement is replaced in later versions of MySQL by RESET BINARY LOGS AND GTIDS, and should be considered deprecated. See RESET BINARY LOGS AND GTIDS Statement, in the MySQL 8.4 Manual, for more information. The value of the gtid_purged ...RESET MASTER [TO binary_log_file_index_number] Warning Use this statement with caution to ensure you do not lose any wanted binary log file data and GTID execution ...
https://dev.mysql.com/doc/refman/8.0/en/selecting-all.html
Fix only the erroneous record with an UPDATE statement: mysql> UPDATE pet SET birth = '1989-08-31' WHERE name = 'Bowser'; The UPDATE changes only the record in question and does not require you to reload the table. For example, you may happen to ...
https://dev.mysql.com/doc/refman/8.0/en/selecting-columns.html
If you do not want to see entire rows from your table, just name the columns in which you are interested, separated by commas.
https://dev.mysql.com/doc/refman/8.0/en/show-columns.html
The data types may differ from what you expect them to be based on a CREATE TABLE statement because MySQL sometimes changes data types when you create or alter a table. These two statements are equivalent: SHOW COLUMNS FROM mytable FROM mydb; SHOW ... SHOW [EXTENDED] [FULL] {COLUMNS | FIELDS} {FROM | IN} tbl_name [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW COLUMNS displays information about the columns in a given ...
https://dev.mysql.com/doc/refman/8.0/en/show-status.html
A global status variable may represent status for some aspect of the server itself (for example, Aborted_connects), or the aggregated status over all connections to MySQL (for example, Bytes_received and Bytes_sent). mysql> SHOW STATUS; ... SHOW ...
https://dev.mysql.com/doc/refman/8.0/en/silent-column-changes.html
In some cases, MySQL silently changes column specifications from those given in a CREATE TABLE or ALTER TABLE statement. MySQL maps certain data types used by other SQL database vendors to MySQL types. These might be changes to a data type, to ...
https://dev.mysql.com/doc/refman/8.0/en/source-thread-states.html
In MySQL 8.0.26, incompatible changes were made to instrumentation names, including the names of thread stages, containing the terms “master”, which is changed to “source”, “slave”, which is changed to “replica”, and “mts” (for ... The following list shows the most common states you may see in the State column for the Binlog Dump thread of the replication ...
https://dev.mysql.com/doc/refman/8.0/en/storage-engine-setting.html
You can set the default storage engine for the current session by setting the default_storage_engine variable: SET default_storage_engine=NDBCLUSTER; The storage engine for TEMPORARY tables created with CREATE TEMPORARY TABLE can be set separately ... When you create a new table, you can specify which storage engine to use by adding an ENGINE table option to the CREATE TABLE statement: -- ENGINE=INNODB not needed unless you have set a different -- default storage ...