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Search Results
https://dev.mysql.com/doc/refman/8.0/en/charset-connection.html
To tell the server to perform no conversion of result sets or error messages, set character_set_results to NULL or binary: SET character_set_results = NULL; SET character_set_results = binary; For more information about character sets and error ...
https://dev.mysql.com/doc/refman/8.0/en/constraint-foreign-key.html
The available referential actions are RESTRICT, CASCADE, SET NULL, and NO ACTION (the default). Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ...
https://dev.mysql.com/doc/refman/8.0/en/csv-storage-engine.html
The CSV storage engine stores data in text files using comma-separated values format. The CSV storage engine is always compiled into the MySQL server. To examine the source for the CSV engine, look in the storage/csv directory of a MySQL source ...
https://dev.mysql.com/doc/refman/8.0/en/data-masking-components-installation.html
CREATE TABLE IF NOT EXISTS mysql.masking_dictionaries( Dictionary VARCHAR(256) NOT NULL, Term VARCHAR(256) NOT NULL, UNIQUE INDEX dictionary_term_idx (Dictionary, Term), INDEX dictionary_idx (Dictionary) ) ENGINE = InnoDB DEFAULT CHARSET=utf8mb4; ...
https://dev.mysql.com/doc/refman/8.0/en/date-and-time-types.html
MySQL permits you to store a “zero” value of '0000-00-00' as a “dummy date.” In some cases, this is more convenient than using NULL values, and uses less data and index space. “Zero” date or time values used through Connector/ODBC are ...
https://dev.mysql.com/doc/refman/8.0/en/derived-condition-pushdown-optimization.html
MySQL 8.0.22 and later supports derived condition pushdown for eligible subqueries. When a derived table cannot be merged into the outer query (for example, if the derived table uses aggregation), pushing the outer WHERE condition down to the ...
https://dev.mysql.com/doc/refman/8.0/en/example-maximum-column-group-row.html
Task: For each article, find the dealer or dealers with the most expensive price. Other possibilities for solving the problem are to use an uncorrelated subquery in the FROM clause, a LEFT JOIN, or a common table expression with a window function.
https://dev.mysql.com/doc/refman/8.0/en/firewall-usage.html
To clear the training account if it actually is desired to enable all group members to perform training in RECORDING mode, call sp_set_firewall_group_mode_and_user() and pass a NULL value for the account argument: CALL ... Before using MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/fulltext-natural-language.html
By default or with the IN NATURAL LANGUAGE MODE modifier, the MATCH() function performs a natural language search for a string against a text collection. A collection is a set of one or more columns included in a FULLTEXT index. For each row in the ...
https://dev.mysql.com/doc/refman/8.0/en/fulltext-search-mecab.html
The built-in MySQL full-text parser uses the white space between words as a delimiter to determine where words begin and end, which is a limitation when working with ideographic languages that do not use word delimiters. To address this limitation ...