Mysql必读mysql 表空间及索引的查看方法
发布时间:2020-12-12 01:13:01 所属栏目:MySql教程 来源:网络整理
导读:《Mysql必读mysql 表空间及索引的查看方法》要点: 本文介绍了Mysql必读mysql 表空间及索引的查看方法,希望对您有用。如果有疑问,可以联系我们。 1.查看索引 (1)单位是GB SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024),2),' GB') AS 'Total Ind
《Mysql必读mysql 表空间及索引的查看方法》要点: (1)单位是GB SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024),2),' GB') AS 'Total Index Size' FROM information_schema.TABLES WHERE table_schema LIKE 'database'; +------------------+ | Total Index Size | +------------------+ | 1.70 GB | +------------------+ (2)单位是MB SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024),' MB') AS 'Total Index Size' FROM information_schema.TABLES WHERE table_schema LIKE 'database'; 其中“database”为你所要查看的数据库 2.查看表空间 SELECT CONCAT(ROUND(SUM(data_length)/(1024*1024*1024),' GB') AS 'Total Data Size' FROM information_schema.TABLES WHERE table_schema LIKE 'database'; +-----------------+ | Total Data Size | +-----------------+ | 3.01 GB | +-----------------+ 3.查看数据库中所有表的信息 SELECT CONCAT(table_schema,'.',table_name) AS 'Table Name', CONCAT(ROUND(table_rows/1000000,'M') AS 'Number of Rows', CONCAT(ROUND(data_length/(1024*1024*1024),'G') AS 'Data Size', CONCAT(ROUND(index_length/(1024*1024*1024),'G') AS 'Index Size', CONCAT(ROUND((data_length+index_length)/(1024*1024*1024),'G') AS'Total'FROM information_schema.TABLES WHERE table_schema LIKE 'database'; (编辑:李大同) 【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! |