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”為你所要查看的數據庫
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.查看數據庫中所有表的信息
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';
