…means it does not change whole that quickly at extent to affect optimizer plans. If you look at the…cardinality: mysql> select count(distinct c) from antest; +——————-+ | count(distinct c) | +——————-+ | 101 | +——————-+ 1 row in set (0.36 sec) mysql…
Comment: Database problems in MySQL/PHP Applications
August 11, 2006 By 13 Comments
…what database is used, abstracting out core functionality usually means…in two separate databases in the same instance of MySQL. If nothing else, it makes replicating a subset of the…what I’m looking for in this table?” An index that has very high cardinality (as high as the number of rows in the…
