使用SQL命令查看MYSQL數據庫大小

mysql>   
mysql> use information_schema ;  /*切換到information_schema數據下*/     
Database changed  
mysql>   
mysql> select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables;  /*查詢所有數據大小*/     
+----------+  
| data     |  
+----------+  
| 123.68MB |  
+----------+  
1 row in set (0.36 sec)  
  
mysql> select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='hrkip';  /*查詢數據庫名稱為“hrkip”的數據大小*/   
+--------+  
| data   |  
+--------+  
| 8.65MB |  
+--------+  
1 row in set (0.00 sec)  
  
mysql> select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='hrkip' and table_name='jx_lsjl' ;  /*查詢數據庫名稱為“hrkip”，表名為“ jx_lsjl”的數據大小*/   
+--------+  
| data   |  
+--------+  
| 6.77MB |  
+--------+  
1 row in set (0.00 sec)  
  

 

備注 ：

data_length ：存儲數據大小

data_length/1024/1024：將字節轉換為MB

round(sum(data_length/1024/1024),2)：取兩位小數

concat(round(sum(data_length/1024/1024),2),'MB') ：給計算結果追加單位 “MB”