1.查看所有数据库各容量大小
select table_schema as '数据库', sum(table_rows) as '记录数', sum(truncate(data_length/1024/1024/1024, 2)) as '数据容量(GB)', sum(truncate(index_length/1024/1024/1024, 2)) as '索引容量(GB)' from information_schema.tables group by table_schema order by sum(data_length) desc, sum(index_length) desc;
2.查看所有数据库各表容量大小
select table_schema as '数据库', table_name as '表名', table_rows as '记录数', truncate(data_length/1024/1024/1024, 2) as '数据容量(GB)', truncate(index_length/1024/1024/1024, 2) as '索引容量(GB)' from information_schema.tables order by data_length desc, index_length desc;
4.查看指定数据库各表容量大小
select table_schema as '数据库', table_name as '表名', table_rows as '记录数', truncate(data_length/1024/1024/1024, 2) as '数据容量(GB)', truncate(index_length/1024/1024/1024, 2) as '索引容量(GB)' from information_schema.tables where table_schema='dl_spider' order by data_length desc, index_length desc;
// 生成指定时间范围内的删表语句
Select CONCAT( 'drop table ', table_name, ';' ) FROM (select table_name,SUBSTRING_INDEX(table_name,'_',-1) as 'c_time' from information_schema.tables where table_schema='dl_spider' and table_name like 'taptap_%' and table_name != 'taptap_cp' having c_time <= '20210725' order by c_time desc ) as tmp;
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