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https://dev.mysql.com/doc/refman/8.4/en/rebuilding-tables.html
This section describes how to rebuild or repair tables or indexes, which may be necessitated by: Changes to how MySQL handles data types or character sets. For example, an error in a collation might have been corrected, necessitating a table ...
https://dev.mysql.com/doc/refman/8.4/en/explain-output.html
EXPLAIN returns a row of information for each table used in the SELECT statement. It lists the tables in the output in the order that MySQL would read them while processing the statement. This means that MySQL reads a row from the first table, then ... The EXPLAIN statement provides information about how MySQL executes ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-create-table-external.html
There are different reasons for creating InnoDB tables externally; that is, creating tables outside of the data directory. Those reasons might include space management, I/O optimization, or placing tables on a storage device with particular ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-statement-summary-tables.html
The Performance Schema maintains tables for collecting current and recent statement events, and aggregates that information in summary tables. Section 29.12.6, “Performance Schema Statement Event Tables” describes the events on which statement ...Example statement event summary information: mysql> SELECT * FROM performance_schema.events_statements_summary_global_by_event_name\G *************************** ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-predictions-ml-predict-table.html
ML_PREDICT_TABLE generates predictions for an entire table of trained data. Depending on your MySQL version, we recommend the following: Before MySQL 9.4.1, limit operations to batches of rows by splitting large tables into smaller tables by using ...The following example trains a dataset with the classification machine learning ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-partitions-table.html
Each row in this table corresponds to an individual partition or subpartition of a partitioned table. The PARTITIONS table has these columns: TABLE_CATALOG The name of the catalog to which the table belongs. TABLE_SCHEMA The name of the schema ...
https://dev.mysql.com/doc/refman/8.4/en/truncate-table.html
Logically, TRUNCATE TABLE is similar to a DELETE statement that deletes all rows, or a sequence of DROP TABLE and CREATE TABLE statements. To achieve high performance, TRUNCATE TABLE bypasses the DML method of deleting data. Thus, it does not cause ...For more information, see Section 15.1.1, “Atomic Data Definition Statement ...
https://dev.mysql.com/doc/refman/8.4/en/table-size-limit.html
The effective maximum table size for MySQL databases is usually determined by operating system constraints on file sizes, not by MySQL internal limits. Windows users, please note that FAT and VFAT (FAT32) are not considered suitable for production ...For up-to-date information operating system file size limits, refer to the documentation specific to your operating ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-events-waits-current-table.html
The table stores one row per thread showing the current status of the thread's most recent monitored wait event, so there is no system variable for configuring the table size. Of the tables that contain wait event rows, events_waits_current is the ...The THREAD_ID and EVENT_ID values taken together uniquely identify the ...
https://dev.mysql.com/doc/refman/8.4/en/multiple-tables.html
The pet table keeps track of which pets you have. If you want to record other information about them, such as events in their lives like visits to the vet or when litters are born, you need another table. What should this table look like? It needs ...An event type field, if you want to be able to categorize ...