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https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-columns-table.html
HAS_DEFAULT A boolean value indicating whether a column that was added instantly using ALTER TABLE ... DEFAULT_VALUE The initial default value of a column that was added instantly using ALTER TABLE ... For related usage information and examples, see ...When a column is dropped, the remaining columns are reordered so that the sequence has no ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-events-table.html
The EVENTS table provides information about Event Manager events, which are discussed in Section 27.4, “Using the Event Scheduler”. The EVENTS table has these columns: EVENT_CATALOG The name of the catalog to which the event belongs. EXECUTE_AT ...EVENT_SCHEMA The name of the schema (database) to which the event ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-limitations-storage-engines.html
CREATE TABLE and ALTER TABLE statements that would cause a user-partitioned NDB table not to meet either or both of the following two requirements are not permitted, and fail with an error: The table must have an explicit primary key. Partitioned ...
https://dev.mysql.com/doc/refman/8.0/en/update.html
UPDATE is a DML statement that modifies rows in a table. An UPDATE statement can start with a WITH clause to define common table expressions accessible within the UPDATE. Single-table syntax: UPDATE [LOW_PRIORITY] [IGNORE] table_reference SET ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-performance-schema.html
Stage Event tables, which store event data for InnoDB ALTER TABLE and buffer pool load operations. For more information, see Section 17.16.1, “Monitoring ALTER TABLE Progress for InnoDB Tables Using Performance Schema”, and Monitoring Buffer ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-columns-table.html
The related ST_GEOMETRY_COLUMNS table provides information about table columns that store spatial data. The COLUMNS table has these columns: TABLE_CATALOG The name of the catalog to which the table containing the column belongs. TABLE_SCHEMA The ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-deleted-table.html
The INNODB_FT_DELETED table stores rows that are deleted from the FULLTEXT index for an InnoDB table. Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that contains ...For more information about InnoDB FULLTEXT search, see Section 17.6.2.4, “InnoDB Full-Text Indexes”, and Section 14.9, “Full-Text Search ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-key-column-usage-table.html
This table provides no information about functional key parts because they are expressions and the table provides information only about columns. The KEY_COLUMN_USAGE table has these columns: CONSTRAINT_CATALOG The name of the catalog to which the ...CONSTRAINT_SCHEMA The name of the schema (database) to which the constraint ...
https://dev.mysql.com/doc/refman/8.0/en/json-table-functions.html
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 columns. This can be a constant ('{"a":1}'), a column (t1.json_data, given table t1 specified prior ... This section contains information about JSON functions that convert JSON data to tabular ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-relational-tables.html
You can also use X DevAPI to work with relational tables. In MySQL, each relational table is associated with a particular storage engine. The examples in this section use InnoDB tables in the world_x schema. Show All Tables To display all ...