MYSQL:查看的数据库表空间

/*1.查看索引

（1）单位是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）单位是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”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), 6), " 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", 
	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";