how big is my table?

howbigismytable.sql

 SELECT count(*) tables,
       concat(round(sum(table_rows),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 "%extraction%";