mysql 查询数据库中表记录数

select
table_name ,
sum(table_rows) as '记录数',
sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
from information_schema.tables where table_schema = 'maintain_test'
group by table_name
order by sum(data_length) desc, sum(index_length) desc;