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https://dev.mysql.com/doc/mysql-ai/9.4/en/mys-mysqlai-train-test-split.html
Two new tables in the same database are created with the following names: [original_table_name]_train [original_table_name]_test The split of the data between training and testing datasets depends on the machine learning task. Order the table by the ... The TRAIN_TEST_SPLIT routine automatically splits your data into training and testing ...
https://dev.mysql.com/doc/refman/8.4/en/faqs-tablespace-encryption.html
To encrypt data in an InnoDB file-per-table tablespace, run ALTER TABLE tbl_name ENCRYPTION = 'Y'. To encrypt a general tablespace or the mysql tablespace, run ALTER TABLESPACE tablespace_name ENCRYPTION = 'Y'. Does the transportable tablespaces ...
https://dev.mysql.com/doc/workbench/en/wb-migration-database-access.html
Preparing a Microsoft Access Database for Migration Microsoft Access stores relationship/foreign key information in an internal table called MSysRelationships. That table is protected against read access even to the Admin user, so if you try to ...
https://dev.mysql.com/doc/connector-odbc/en/connector-odbc-usagenotes-apptips-microsoft-access.html
If you want to have MEMO columns instead, change BLOB columns to TEXT with ALTER TABLE. Include a TIMESTAMP column in all tables that you want to be able to update. Include a primary key in each MySQL table you want to use with Access. If you are ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/mem-qanal-using-ui.html
Figure 32.1 Default Query Analyzer View Table 32.2 Controls of the default Query Analyzer view Control Description Filters Query Analyzer: contains the following default, system filters: Administration Statements: filters on statements of type ...
https://dev.mysql.com/doc/refman/8.4/en/constraint-foreign-key.html
MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements. Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL ...The available referential actions are RESTRICT, CASCADE, SET NULL, and NO ACTION (the ...
https://dev.mysql.com/doc/refman/8.4/en/data-dictionary-file-removal.html
ddl_log.log file: The file contained records of metadata operations generated by data definition statements such as DROP TABLE and ALTER TABLE. Unless otherwise noted, data previously stored in metadata files is now stored in data dictionary tables.
https://dev.mysql.com/doc/refman/8.4/en/faqs-views.html
What happens to a view if an underlying table is dropped or renamed? After a view has been created, it is possible to drop or alter a table or view to which the definition refers. What happens to a view if an underlying table is dropped or renamed? ...Can you insert into views that are based on joins? ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-read-only-instance.html
The same restriction applies to any operation that modifies data dictionary tables, such as ANALYZE TABLE and ALTER TABLE tbl_name ENGINE=engine_name. You can query InnoDB tables where the MySQL data directory is on read-only media by enabling the ...How to Enable To prepare an instance for read-only operation, make sure all the necessary information is flushed to the data files before storing it on the read-only ...
https://dev.mysql.com/doc/refman/8.4/en/keywords.html
Certain keywords, such as SELECT, DELETE, or BIGINT, are reserved and require special treatment for use as identifiers such as table and column names. Reserved words are permitted as identifiers if you quote them as described in Section 11.2, ...