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https://dev.mysql.com/doc/internals/en/optimizer-constants-constant-tables.html
unique_not_null_column INT NOT NULL UNIQUE then this expression FROM Table1 ... These rules mean that a constant table has at most one row value. MySQL will evaluate a constant table in advance, to find out what that value is. Here's an example: ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-innodb-ft-being-deleted-table.html
The INNODB_FT_BEING_DELETED table provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance operation. When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-table-descriptions.html
Tables in the performance_schema database can be grouped as follows: Setup tables. The events_waits_current table contains the most recent event for each thread. Other similar tables contain current events at different levels of the event ...An ...
https://dev.mysql.com/doc/refman/8.4/en/load-xml.html
Suppose that we have a table named person, created as shown here: USE test; CREATE TABLE person ( person_id INT NOT NULL PRIMARY KEY, fname VARCHAR(40) NULL, lname VARCHAR(40) NULL, created TIMESTAMP ); Suppose further that this table is initially ...To write data from a table to an XML file, you can invoke the mysql client with the --xml and -e options from the system shell, as shown here: $> mysql --xml -e 'SELECT * FROM mydb.mytable' > file.xml To read the file back into a table, use LOAD ...
https://dev.mysql.com/doc/refman/8.4/en/show-tables.html
The optional EXTENDED modifier causes SHOW TABLES to list hidden tables created by failed ALTER TABLE statements. SHOW [EXTENDED] [FULL] TABLES [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW TABLES lists the non-TEMPORARY tables in a ...
https://dev.mysql.com/doc/workbench/en/wb-using-table-tool.html
Create a table by clicking anywhere on the EER Diagram canvas. This action creates a new table with the default name table1. Tables can also be added to an EER Diagram using the table tool on the vertical toolbar. Make sure that the EER Diagram tab ...The Default Engine and Default Collation values refer to the database ...
https://dev.mysql.com/doc/workbench/en/wb-admin-export-import-table.html
The wizard can be performed against local or remotely connected MySQL servers, and the import action includes table, column, and type mapping. Note This wizard only exports/imports tables using the JSON or CSV format. The wizard is accessible from ... This wizard supports import and export operations using CSV and JSON files, and includes several configuration options (separators, column selection, encoding selection, and ...
https://dev.mysql.com/doc/internals/en/flush-tables.html
The idea of FLUSH TABLES is to force all tables to be closed. This is mainly to ensure that if someone adds a new table outside of MySQL (for example, by copying files into a database directory with cp), all threads will start using the new table.
https://dev.mysql.com/doc/refman/8.4/en/information-schema-innodb-buffer-page-lru-table.html
The INNODB_BUFFER_PAGE_LRU table provides information about the pages in the InnoDB buffer pool; in particular, how they are ordered in the LRU list that determines which pages to evict from the buffer pool when it becomes full. The ...It has ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-memory-summary-tables.html
Memory summary tables do not contain timing information because memory events are not timed. Example memory event summary information: mysql> SELECT * FROM performance_schema.memory_summary_global_by_event_name WHERE EVENT_NAME = ...Operation counts ...