Query library occupied space and index space occupied

Check the status of the entire library:

select concat(truncate(sum(data_length)/1024/1024,2),'MB') as data_size,

concat(truncate(sum(max_data_length)/1024/1024,2),'MB') as max_data_size,

concat(truncate(sum(data_free)/1024/1024,2),'MB') as data_free,

concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size

from information_schema.tables where TABLE_SCHEMA = 'databasename';

 

Check a single table:

select concat(truncate(sum(data_length)/1024/1024,2),'MB') as data_size,

concat(truncate(sum(max_data_length)/1024/1024,2),'MB') as max_data_size,

concat(truncate(sum(data_free)/1024/1024,2),'MB') as data_free,

concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size

from information_schema.tables where TABLE_NAME = 'tablename';

 

View the database size use:

select concat(round(sum(data_length/1024/1024),2),’MB’) as data from information_schema.tables where table_schema=’DB_Name’ ;

 

View table using Size:

select concat(round(sum(data_length/1024/1024),2),’MB’) as data from information_schema.tables where table_schema=’DB_Name’ and table_name=’Table_Name’;

 

Or directly: 

SHOW TABLE STATUS;