MYSQL:查看的数据库表空间

/*转自：http://blog.csdn.net/c_enhui/article/details/9815057 */
/*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';