how to get mysql table size in GB

Question

Just ended up with calculating the size of MySQL table in GB with the following query.

SELECT (data_length+index_length)/power(1024,3) tablesize_gb FR

Answer 1

To find table size we can use something like this..

SELECT count(*) tables,
       concat(round(sum(table_rows)/1000000,2),'M') rows,
       concat(round(sum(data_length)/(1024*1024*1024),2),'G') data,
       concat(round(sum(index_length)/(1024*1024*1024),2),'G') idx,
       concat(round(sum(data_length+index_length)/(1024*1024*1024),2),'G') total_size,
       round(sum(index_length)/sum(data_length),2) idxfrac
       FROM information_schema.TABLES
       WHERE  table_name like "%table-name%"

Find the largest table in MYSQL Databases we can use something like this

SELECT CONCAT(table_schema, '.', table_name),
       CONCAT(ROUND(table_rows / 1000000, 2), 'M')                                    rows,
       CONCAT(ROUND(data_length / ( 1024 * 1024 * 1024 ), 2), 'G')                    DATA,
       CONCAT(ROUND(index_length / ( 1024 * 1024 * 1024 ), 2), 'G')                   idx,
       CONCAT(ROUND(( data_length + index_length ) / ( 1024 * 1024 * 1024 ), 2), 'G') total_size,
       ROUND(index_length / data_length, 2)                                           idxfrac
FROM   information_schema.TABLES
ORDER  BY data_length + index_length DESC
LIMIT  10