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标题: MYSQL:查看的数据库表空间 [打印本页]

作者: admin 时间: 2017-3-4 21:14
标题: MYSQL:查看的数据库表空间

/*1.查看索引
（1）单位是GB*/
SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024), 6), ' 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), 6), ' 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), 6), ' 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',
table_rows AS 'Number of Rows',
CONCAT(ROUND(data_length/(1024*1024*1024),6),' G') AS 'Data Size',
CONCAT(ROUND(index_length/(1024*1024*1024),6),' G') AS 'Index Size' ,
CONCAT(ROUND((data_length+index_length)/(1024*1024*1024),6),' G') AS'Total'
FROM information_schema.TABLES
WHERE table_schema LIKE 'database';

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