MySQL索引性能测验
发布时间:2022-04-11 17:03:05 所属栏目:MySql教程 来源:互联网
导读:很长一段时间没学习MySQL了,一直致力于oracle的研究,最近得空了就再拾起MySQL看看吧,记得去年发布过的2篇MySQL文章: 今天我们就来看看mysql中索引的性能测试: 1 准备环境 1.1 在数据库中创建测试表test1 [root@rhel6_lhr ~]# mysql -p Enter password
很长一段时间没学习MySQL了,一直致力于oracle的研究,最近得空了就再拾起MySQL看看吧,记得去年发布过的2篇MySQL文章: 今天我们就来看看mysql中索引的性能测试: 1 准备环境 1.1 在数据库中创建测试表test1 [root@rhel6_lhr ~]# mysql -p Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 14 Server version: 5.6.21-enterprise-commercial-advanced MySQL Enterprise Server - Advanced Edition (Commercial) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | db1 | | db4 | | lhr_test | | mysql | | opensource | | opesource | | performance_schema | | test | | wyzc | +--------------------+ 10 rows in set (0.00 sec) ![]() mysql> use lhr_test; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A mysql> desc test1; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | num | int(11) | YES | | NULL | | | pass | varchar(50) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 3 rows in set (0.00 sec) mysql> create table test3( -> id int, -> num int, -> pass varchar(50) -> ); reset query cache;Query OK, 0 rows affected (0.09 sec) (编辑:PHP编程网 - 黄冈站长网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |