1.查看索引

(1)單位是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)單位是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”為你所要查看的數(shù)據(jù)庫

2.查看表空間

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.查看數(shù)據(jù)庫中所有表的信息

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';

總結(jié)

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