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MySQL数据库表空间及索引的查看

2024-07-15 23:21:18   223人阅读

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，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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