mysql数据库如何查看表空间_MySQL数据库表空间及索引的查看

本文我们介绍MySQL数据库表空间和索引的查看方法，并详细地给出了其代码mysql表索引，接下来我们一一介绍。

1.查看索引

(1)单位是GB

SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024), 2), ' GB')

AS 'Total Index Size'

+------------------+

| Total Index Size |

+------------------+

| 1.70 GB |

+------------------+

(2)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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