CREATE TABLE t (x int); CREATE CACHE c1 FROM SELECT x FROM t; CREATE CACHE c2 FROM SELECT x FROM t; CREATE CACHE c2 FROM SELECT x FROM t; SHOW CACHES pulls from the expression registry, so at first I ...
If Table B records not exist, do nothing. (3) Aggregation Table Aggregation Table is table whose data is aggregation from one or serveral tables.It is very expensive to update Aggregation Table, ...