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https://dev.mysql.com/doc/refman/9.7/en/character-arrays.html
Each simple character set has a configuration file located in the sql/share/charsets directory. For a character set named MYSYS, the file is named MYSET.xml. <map> elements appear within these elements: <ctype> defines attributes for each character. <collation> elements indicate character ordering for comparison and sorting, one element per ...
https://dev.mysql.com/doc/refman/9.7/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/9.7/en/command-line-options.html
Program options specified on the command line follow these rules: Options are given after the command name. An option argument begins with one dash or two dashes, depending on whether it is a short form or long form of the option name. For example, ...
https://dev.mysql.com/doc/refman/9.7/en/connecting-using-uri-or-key-value-pairs.html
This section describes use of URI-like connection strings or key-value pairs to specify how to establish connections to the MySQL server, for clients such as MySQL Shell. For information on establishing connections using command-line options, for ...
https://dev.mysql.com/doc/refman/9.7/en/constraint-enum.html
ENUM and SET columns provide an efficient way to define columns that can contain only a given set of values. See Section 13.3.6, “The ENUM Type”, and Section 13.3.7, “The SET Type”. Unless strict mode is disabled (not recommended, but see ...
https://dev.mysql.com/doc/refman/9.7/en/data-type-defaults.html
Data type specifications can have explicit or implicit default values. A DEFAULT value clause in a data type specification explicitly indicates a default value for a column. Examples: CREATE TABLE t1 ( i INT DEFAULT -1, c VARCHAR(10) DEFAULT '', ...
https://dev.mysql.com/doc/refman/9.7/en/data-types.html
MySQL supports SQL data types in several categories: numeric types, date and time types, string (character and byte) types, spatial types, and the JSON data type. This chapter provides an overview and more detailed description of the properties of ...
https://dev.mysql.com/doc/refman/9.7/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/9.7/en/date-and-time-type-syntax.html
The date and time data types for representing temporal values are DATE, TIME, DATETIME, TIMESTAMP, and YEAR. For the DATE and DATETIME range descriptions, “supported” means that although earlier values might work, there is no guarantee. MySQL ...
https://dev.mysql.com/doc/refman/9.7/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 ...