Search Results
https://dev.mysql.com/doc/refman/8.4/en/aggregate-functions.html
This section describes aggregate functions that operate on sets of values. They are often used with a GROUP BY clause to group values into subsets. If you use an aggregate function in a statement containing no GROUP BY clause, it is equivalent to ...
https://dev.mysql.com/doc/refman/8.4/en/bit-value-literals.html
A leading 0b is case-sensitive and cannot be written as 0B. In numeric contexts, MySQL treats a bit literal like an integer. To ensure numeric treatment of a bit literal, use it in numeric context. For example, a bit literal assigned to a ...
https://dev.mysql.com/doc/refman/8.4/en/charset-introducer.html
A character string literal, hexadecimal literal, or bit-value literal may have an optional character set introducer and COLLATE clause, to designate it as a string that uses a particular character set and collation: [_charset_name] literal [COLLATE ...
https://dev.mysql.com/doc/refman/8.4/en/choosing-types.html
For optimum storage, you should try to use the most precise type in all cases. For example, if an integer column is used for values in the range from 1 to 99999, MEDIUMINT UNSIGNED is the best type. Of the types that represent all the required ...
https://dev.mysql.com/doc/refman/8.4/en/compressed-format.html
Compressed storage format is a read-only format that is generated with the myisampack tool. Compressed tables have the following characteristics: Compressed tables take very little disk space. This minimizes disk usage, which is helpful when using ...
https://dev.mysql.com/doc/refman/8.4/en/converting-tables-to-innodb.html
If you have MyISAM tables that you want to convert to InnoDB for better reliability and scalability, review the following guidelines and tips before converting. Note Partitioned MyISAM tables created in previous versions of MySQL are not compatible ...
https://dev.mysql.com/doc/refman/8.4/en/create-table-secondary-indexes.html
A secondary index defined on a virtual column is sometimes referred to as a “virtual index”. A secondary index may be created on one or more virtual columns or on a combination of virtual columns and regular columns or stored generated columns.
https://dev.mysql.com/doc/refman/8.4/en/data-masking-component-usage.html
Before using MySQL Enterprise Data Masking and De-Identification, install it according to the instructions provided at Section 8.5.2.1, “MySQL Enterprise Data Masking and De-Identification Component Installation”. To use MySQL Enterprise Data ...
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/differences-from-ansi.html
We try to make MySQL Server follow the ANSI SQL standard and the ODBC SQL standard, but MySQL Server performs operations differently in some cases: There are several differences between the MySQL and standard SQL privilege systems. For example, in ...