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https://dev.mysql.com/doc/refman/8.4/en/data-directory-initialization.html
After MySQL is installed, the data directory must be initialized, including the tables in the mysql system schema: For some MySQL installation methods, data directory initialization is automatic, as described in Section 2.9, “Postinstallation ...
https://dev.mysql.com/doc/refman/8.4/en/data-masking-plugin-function-reference.html
Table 8.47 MySQL Enterprise Data Masking and De-Identification Plugin Functions Name Description Deprecated gen_blacklist() Perform dictionary term replacement Yes gen_blocklist() Perform dictionary term replacement gen_dictionary_drop() Remove ...
https://dev.mysql.com/doc/refman/8.4/en/data-masking-plugin-usage.html
Before using MySQL Enterprise Data Masking and De-Identification, install it according to the instructions provided at Section 8.5.3.1, “MySQL Enterprise Data Masking and De-Identification Plugin Installation”. To use MySQL Enterprise Data ...
https://dev.mysql.com/doc/refman/8.4/en/data-size.html
Design your tables to minimize their space on the disk. This can result in huge improvements by reducing the amount of data written to and read from disk. Smaller tables normally require less main memory while their contents are being actively ...
https://dev.mysql.com/doc/refman/8.4/en/database-use.html
Once you know how to enter SQL statements, you are ready to access a database. Suppose that you have several pets in your home (your menagerie) and you would like to keep track of various types of information about them. You can do so by creating ...
https://dev.mysql.com/doc/refman/8.4/en/date-and-time-type-conversion.html
To some extent, you can convert a value from one temporal type to another. However, there may be some alteration of the value or loss of information. In all cases, conversion between temporal types is subject to the range of valid values for the ...
https://dev.mysql.com/doc/refman/8.4/en/ddl-rewriter.html
MySQL 8.4 includes a ddl_rewriter plugin that modifies CREATE TABLE statements received by the server before it parses and executes them. The plugin removes ENCRYPTION, DATA DIRECTORY, and INDEX DIRECTORY clauses, which may be helpful when ...
https://dev.mysql.com/doc/refman/8.4/en/declare-cursor.html
DECLARE cursor_name CURSOR FOR select_statement This statement declares a cursor and associates it with a SELECT statement that retrieves the rows to be traversed by the cursor. The number of columns retrieved by the SELECT statement must match the ...
https://dev.mysql.com/doc/refman/8.4/en/deleting-from-related-tables.html
If the total length of the DELETE statement for related_table is more than the default value of the max_allowed_packet system variable, you should split it into smaller parts and execute multiple DELETE statements. You probably get the fastest ...
https://dev.mysql.com/doc/refman/8.4/en/derived-condition-pushdown-optimization.html
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 derived table should decrease the number of rows that need to be processed and thus speed ...