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https://dev.mysql.com/doc/refman/8.0/en/window-functions-frames.html
Frames are determined with respect to the current row, which enables a frame to move within a partition depending on the location of the current row within its partition. Examples: By defining a frame to be all rows from the partition start to the ... The definition of a window used with a window function can include a frame ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-management-range-list.html
To drop the partition named p2, execute the following command: mysql> ALTER TABLE tr DROP PARTITION p2; Query OK, 0 rows affected (0.03 sec) Note The NDBCLUSTER storage engine does not support ALTER TABLE ... However, there is one important ...
https://dev.mysql.com/doc/refman/8.0/en/information-functions.html
The intended use is from within the mysql client, which reports query execution times: mysql> SELECT BENCHMARK(1000000,AES_ENCRYPT('hello','goodbye')); +---------------------------------------------------+ | ...It may be used to time how quickly ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-replication-schema.html
Important (NDB 8.0.30 and later:) For insert conflict resolution using NDB$MAX_INS() or NDB$MAX_DEL_WIN_INS(), an SQL node (that is, a mysqld process) can record row updates on the source cluster as WRITE_ROW events with the ...If this becomes an ...
https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-concepts.html
A row in this table contains, for each GTID or set of GTIDs that it represents, the UUID of the originating server, and the starting and ending transaction IDs of the set; for a row referencing only a single GTID, these last two values are the same.
https://dev.mysql.com/doc/refman/8.0/en/load-xml.html
The tagname in the optional ROWS IDENTIFIED BY clause must also be given as a literal string, and must be surrounded by angle brackets (< and >). By default, the <row> element is considered to be the equivalent of a database table row; this can be ...LOAD XML acts as the complement of running the mysql client in XML output mode (that is, starting the client with the --xml ...
https://dev.mysql.com/doc/refman/8.0/en/cursor-restrictions.html
One limitation of the implementation is that for a large result set, retrieving its rows through a cursor might be slow. A server-side cursor enables a result set to be generated on the server side, but not transferred to the client except for those ... Server-side cursors are implemented in the C API using the mysql_stmt_attr_set() ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-storage-layout.html
Once your data reaches a stable size, or a growing table has increased by tens or some hundreds of megabytes, consider using the OPTIMIZE TABLE statement to reorganize the table and compact any wasted space. This operation can be slow if the table ...The reorganized tables require less disk I/O to perform full table ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-restrictions-limitations.html
mysql> CREATE TABLE t1 (c1 INT, db_row_id INT) ENGINE=INNODB; ERROR 1166 (42000): Incorrect column name 'db_row_id' SHOW TABLE STATUS does not provide accurate statistics for InnoDB tables except for the physical size reserved by the table. You ...
https://dev.mysql.com/doc/refman/8.0/en/window-function-restrictions.html
You should also be aware that queries using very large numbers of windows may require increasing the default thread stack size (thread_stack system variable). The SQL standard imposes a constraint on window functions that they cannot be used in ...