1.检察一切数据库容量大小
select table_schema as '数据库',sum(table_rows) as '纪录数',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.tablesgroup by table_schemaorder by sum(data_length) desc, sum(index_length) desc;
2.检察一切数据库各表容量大小
select table_schema as '数据库', table_name as '表名', table_rows as '纪录数',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.tablesorder by data_length desc, index_length desc;
3.检察指定数据库容量大小
例:检察mysql库容量大小
select table_schema as '数据库',sum(table_rows) as '纪录数',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.tableswhere table_schema='mysql';
4.检察指定数据库各表容量大小
例:检察mysql库各表容量大小
select table_schema as '数据库', table_name as '表名', table_rows as '纪录数',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.tableswhere table_schema='mysql'order by data_length desc, index_length desc;
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