5. MySQL基于索引的优化

建表语句以下：mysql mysql> create table T ( ID int primary key, k int NOT NULL DEFAULT 0, s varchar(16) NOT NULL DEFAULT '', index k(k)) engine=InnoDB; id k s 100 1 ‘aa’ 200 2 ‘bb’ 300 3 ‘cc’ 500 5 ‘ee’ 200

>>阅读原文<<