conn.commit() cursor.execute("show databases") print(cursor.fetchall()) # 4.删除数据库 cursor.execute('drop database test2') conn.commit() cursor.execute("show databases") print(cursor.fetchall()) # 5.进入数据库 curso
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`information_schema`数据库中的`TABLES`表包含了所有数据库表的详细信息,包括表名、数据库名、引擎类型以及最重要的`Data_length`和`Index_length`字段。这两个字段分别表示表中数据和索引的大小,单位为字节。将这两个字段相加即可得到每个表的总大小。这种查询方式不仅简单高效,而且能够帮助我们全面了解数据库的存储...
问解读mysql的information_schema.tables DATA_LENGTH、INDEX_DATA_LENGTH和DATA_FREEEN查看当前链接所有业务...
通过MySQL的 information_schema 数据库,可查询数据库中每个表占用的空间、表记录的行数;该库中有一个 TABLES 表,这个表主要字段分别是: TABLE_SCHEMA : 数据库名 TABLE_NAME:表名 ENGINE:所使用的存储引擎 TABLES_ROWS:记录数 DATA_LENGTH:数据大小
information_schema.TABLES WHERE table_schema = 'osale_im'; 四、查看指定数据库各表容量大小 1 2 3 4 5 6 7 8 9 10 11 12 13 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)', TRU...
table_schemaas'数据库',table_nameas'表名',table_rowsas'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; ...
No change was there in data_length although there should be. So i turned this parameter on and restart of mysql process freed up space. But not sure what will happen if i will delete from any other table now.Navigate: Previous Message• Next Message Options: Reply• Quote ...
要查询整个数据库的大小,可以使用命令行工具执行"du -sh"命令。该命令将返回整个数据库的大小,以人类可读的方式显示。也可以使用SQL语句执行"SELECT SUM(data_length+index_length) FROM information_schema.tables WHERE table_schema='数据库名'"语句来查询整个数据库的大小。
Re: Data length for INNODB tables 753 sreekanth pm February 22, 2018 03:13AM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily ...