${database} 為數據庫的名稱/*1.查看索引（1）單位是GB*/ SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024), 6), ' GB') AS 'Total Index Size' FROM information_schema.TABLES WHERE table_schema LIKE '${database}'; /* +------------------+ | Total Index Size | +------------------+ | 1.70 GB | +------------------+ */ /* （2）單位是MB */ SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 6), ' MB') AS 'Total Index Size' FROM information_schema.TABLES WHERE table_schema LIKE '${database}'; /*其中“database”為你所要查看的數據庫 *//* 2.查看表空間 */ SELECT CONCAT(ROUND(SUM(data_length)/(1024*1024*1024), 6), ' GB') AS 'Total Data Size' FROM information_schema.TABLES WHERE table_schema LIKE '${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', 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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