How to view mysql table space and index, friends who need it can refer to it.
1. View index
(1) unit is GB
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) The unit is MB
SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 2), 'MB') AS 'Total Index Size' FROM information_schema.TABLES WHERE table_schema LIKE 'database';
where "database" is the database you want to view
2. View the table space
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.查看数据库中所有表的信息
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';