mysql 表空间及索引的查看方法

时间:2020-03-24 21:11来源:计算机教程
1.查看索引 单位是GB SELECTCONCAT(ROUND(SUM(index_length)/(1024*1024*1024), 2), ' GB') AS 'TotalIndex Size' FROM information_schema.TABLES WHERE table_schema LIKE'database'; ------------------ | Total Index Size | ------------------ |

1.查看索引 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 | ------------------ 单位是MB SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 2), ' 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), 2), ' 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/1000000,2),'M') AS 'Number of Rows', CONCAT(ROUND(data_length/(1024*1024*1024),2),'G') AS 'Data Size', CONCAT(ROUND(index_length/(1024*1024*1024),2),'G') AS 'Index Size' , CONCAT(ROUND((data_length index_length)/(1024*1024*1024),2),'G') AS'Total'FROM information_schema.TABLES WHERE table_schema LIKE 'database';

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