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https://dev.mysql.com/doc/refman/8.4/en/creating-tables.html
How about age? That might be of interest, but it is not a good thing to store in a database. Instead, it is better to store a fixed value such as date of birth. For example, if you store death date in the database, you can easily calculate how old a ...You want a table that contains a record for each of your ...
https://dev.mysql.com/doc/refman/8.4/en/datetime.html
In particular, any fractional part in a value inserted into a DATETIME or TIMESTAMP column is stored rather than discarded. As long as the time zone setting remains constant, you get back the same value you store. If you store a TIMESTAMP value, and ...This section describes their characteristics, how they are similar, and how they ...
https://dev.mysql.com/doc/refman/8.4/en/faqs-tablespace-encryption.html
How do I know which data to encrypt? Compliance with the PCI-DSS standard requires that credit card numbers (Primary Account Number, or 'PAN') be stored in encrypted form. When data-at-rest encryption is used, individual tablespace keys are stored ...Is data decrypted for users who are authorized to see it? ...
https://dev.mysql.com/doc/refman/8.4/en/functions.html
Expressions can be written using values from several sources, such as literal values, column values, NULL, variables, built-in functions and operators, loadable functions, and stored functions (a type of stored object). For information about ...
https://dev.mysql.com/doc/refman/8.4/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. For example, gc INT AS (f1) STORED consists only of a column reference, so indexes on gc are not considered.
https://dev.mysql.com/doc/refman/8.4/en/group-replication-cloning.html
The group_replication_recovery channel could then be inadvertently started with the stored credentials, on either the original member or members that were cloned from it. An automatic start of Group Replication on server boot (including after a ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-columns-table.html
The related ST_GEOMETRY_COLUMNS table provides information about table columns that store spatial data. The value is YES if NULL values can be stored in the column, NO if not. It contains the column SRID value that indicates the spatial reference ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-files-table.html
The FILES table provides information about the files in which MySQL tablespace data is stored. In NDB Cluster, this table also provides information about the files in which NDB Cluster Disk Data tables are stored. NDB stores a copy of each data ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-partitions-table.html
AVG_ROW_LENGTH The average length of the rows stored in this partition or subpartition, in bytes. DATA_LENGTH The total length of all rows stored in this partition or subpartition, in bytes; that is, the total number of bytes stored in the partition ...Each row in this table corresponds to an individual partition or subpartition of a partitioned ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-compression-tuning.html
For those cases where there are long rows, the use of compression might result in long column values being stored “off-page”, as discussed in DYNAMIC Row Format. When you compress the data in the application and store the results in a compressed ... Most often, the internal optimizations described in InnoDB Data Storage and Compression ensure that the system runs well with compressed ...