mysql 如何查看表的大小

知识标签: php/mysql/apache

mysql 查看表的大小方法:


1.查看所有数据库容量大小

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, 2) as '数据容量(MB)',


truncate(index_length/1024/1024, 2) as '索引容量(MB)'


from information_schema.tables


order by data_length desc, index_length desc;


3.查看指定数据库容量大小


例:查看mysql库容量大小

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


where table_schema='mysql';


4.查看指定数据库各表容量大小


例:查看mysql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, 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='mysql'


order by data_length desc, index_length desc;


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