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Search Results
https://dev.mysql.com/doc/refman/8.0/en/constraint-foreign-key.html
Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements. The ...
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
As of MySQL 8.0.33, components provide access to MySQL Enterprise Data Masking and De-Identification functionality. Previously, MySQL implemented masking and de-identification capabilities as a plugin library file containing a plugin and several ...
https://dev.mysql.com/doc/refman/8.0/en/date-and-time-types.html
The date and time data types for representing temporal values are DATE, TIME, DATETIME, TIMESTAMP, and YEAR. Each temporal type has a range of valid values, as well as a “zero” value that may be used when you specify an invalid value that MySQL ...
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/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 ...
https://dev.mysql.com/doc/refman/8.0/en/fulltext-search-ngram.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, ...
https://dev.mysql.com/doc/refman/8.0/en/generated-column-index-optimizations.html
For example: CREATE TABLE t1 (f1 INT, gc INT AS (f1 + 1) STORED, INDEX (gc)); The generated column, gc, is defined as the expression f1 + 1. The column is also indexed and the optimizer can take that index into account during execution plan ...