mysql和PG查看表数据大小

#Mysql 查看表数据大小
select
table_schema as ‘数据库’,
table_name as ‘表名’,
table_rows as ‘记录数’,
truncate(data_length/1024/1024, 2) as ‘数据容量(MB)’,
truncate(index_length/1024/1024, 2) as ‘索引容量(MB)’
from information_schema.tables
where table_schema=‘数据库名’
order by data_length desc, index_length desc;

#PGSQl
select pg_size_pretty(pg_relation_size(‘test’));