mysql运维命令

1. 查询数据库容量

select
table_schema as '数据库',
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
group by table_schema
order by sum(data_length) desc, sum(index_length) desc;

2. 查询表数量

SELECt COUNT(*) TABLES, table_schema FROM information_schema.TABLES    GROUP BY table_schema;

3. 导入导出

导出

mysqldump -uroot -pxxxxxx gzss > gzss.sql

导入

mysql -uroot -pxxxxxxx gzss < gzss.sql