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https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-internals.html
Table 14.22 cache_policies Columns Column Description policy_name Name of the cache policy. Table 14.23 config_options Columns Column Description Name Name of the memcached-related configuration option. The following configuration options are ...
https://dev.mysql.com/doc/refman/5.7/en/storage-requirements.html
Table data might be compressed, either for a column or an entire row, complicating the calculation of storage requirements for a table or column. This figure excludes BLOB or TEXT columns, which contribute only 9 to 12 bytes toward this size. For ...
https://dev.mysql.com/doc/refman/5.7/en/select.html
} export_options: [{FIELDS | COLUMNS} [TERMINATED BY 'string'] [[OPTIONALLY] ENCLOSED BY 'char'] [ESCAPED BY 'char'] ] [LINES [STARTING BY 'string'] [TERMINATED BY 'string'] ] SELECT is used to retrieve rows selected from one or more tables, and can ... SELECT [ALL | DISTINCT | DISTINCTROW ] [HIGH_PRIORITY] [STRAIGHT_JOIN] [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT] [SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS] select_expr [, select_expr] ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-operations.html
Operations that add and drop indexes on variable-width columns of NDB tables occur online. ALGORITHM=INPLACE can be used to perform online ADD COLUMN, ADD INDEX (including CREATE INDEX statements), and DROP INDEX operations on NDB tables. This means ... MySQL NDB Cluster 7.5 and 7.6 support online table schema changes using ALTER TABLE ...
https://dev.mysql.com/doc/refman/5.7/en/string-type-syntax.html
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 string columns (CHAR, VARCHAR, and the TEXT types), MySQL interprets length specifications ... The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and ...
https://dev.mysql.com/doc/refman/5.7/en/join.html
If you mix comma joins with the other join types when there is a join condition, an error of the form Unknown column 'col_name' in 'on clause' may occur. If there is no matching row for the right table in the ON or USING part in a LEFT JOIN, a row ... MySQL supports the following JOIN syntax for the table_references part of SELECT statements and multiple-table DELETE and UPDATE statements: table_references: escaped_table_reference [, escaped_table_reference] ...
https://dev.mysql.com/doc/refman/5.7/en/migrating-from-year2.html
This section describes problems that can occur when using the 2-digit YEAR(2) data type and provides information about converting existing YEAR(2) columns to 4-digit year-valued columns, which can be declared as YEAR with an implicit display width ...Although the internal range of values for YEAR/YEAR(4) and the deprecated YEAR(2) type is the same (1901 to 2155, and 0000), the display width for YEAR(2) makes that type inherently ambiguous because displayed values indicate only the last two digits of the internal values and omit the century ...
https://dev.mysql.com/doc/refman/5.7/en/alter-table-examples.html
For NDB tables, it is also possible to change the storage type used for a table or column. row *************************** Table: t1 Create Table: CREATE TABLE `t2` ( `c1` int(11) DEFAULT NULL ) /*!50100 TABLESPACE ts_1 STORAGE DISK */ ...For MyISAM ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-fulltext-index.html
Full-text indexes are created on text-based columns (CHAR, VARCHAR, or TEXT columns) to speed up queries and DML operations on data contained within those columns. When a full-text index is dropped, the FTS_DOC_ID column that was created for the ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html
SQL-92 and earlier does not permit queries for which the select list, HAVING condition, or ORDER BY list refer to nonaggregated columns that are not named in the GROUP BY clause. SQL:1999 and later permits such nonaggregates per optional feature ...