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https://dev.mysql.com/doc/refman/8.0/en/char.html
The CHAR and VARCHAR types are similar, but differ in the way they are stored and retrieved. They also differ in maximum length and in whether trailing spaces are retained. The CHAR and VARCHAR types are declared with a length that indicates the ...
https://dev.mysql.com/doc/refman/8.0/en/column-count-limit.html
This section describes limits on the number of columns in tables and the size of individual rows. Column Count Limits Row Size Limits Column Count Limits MySQL has hard limit of 4096 columns per table, but the effective maximum may be less for a ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-limitations.html
This section discusses current restrictions and limitations on MySQL partitioning support. The following constructs are not permitted in partitioning expressions: Stored procedures, stored functions, loadable functions, or plugins. For a list of ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-range.html
A table that is partitioned by range is partitioned in such a way that each partition contains rows for which the partitioning expression value lies within a given range. Ranges should be contiguous but not overlapping, and are defined using the ...
https://dev.mysql.com/doc/refman/8.0/en/string-type-syntax.html
The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and SET. In some cases, MySQL may change a string column to a type different from that given in a CREATE TABLE or ALTER TABLE statement. For definitions of character ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-operations.html
Online support details, syntax examples, and usage notes for DDL operations are provided under the following topics in this section. Index Operations Primary Key Operations Column Operations Generated Column Operations Foreign Key Operations Table ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-columns-list.html
This is a variant of LIST partitioning that enables the use of multiple columns as partition keys, and for columns of data types other than integer types to be used as partitioning columns; you can use string types, DATE, and DATETIME columns. In ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-setup.html
This section describes how to set up the daemon_memcached plugin on a MySQL server. Because the memcached daemon is tightly integrated with the MySQL server to avoid network traffic and minimize latency, you perform this process on each MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-management-exchange.html
Table nt contains no foreign key references, and no other table has any foreign keys that refer to nt. There are no rows in nt that lie outside the boundaries of the partition definition for p. For InnoDB tables, both tables must use the same row ...
https://dev.mysql.com/doc/refman/8.0/en/json-table-functions.html
This section contains information about JSON functions that convert JSON data to tabular data. JSON_TABLE(expr, path COLUMNS (column_list) [AS] alias) Extracts data from a JSON document and returns it as a relational table having the specified ...