首先,我们需要创建一个存储过程,该存储过程将使用循环遍历数据库中的每个表,并计算每个表的大小: DELIMITER//CREATEPROCEDUREget_table_sizes()BEGINDECLAREdoneINTDEFAULTFALSE;DECLAREtable_nameVARCHAR(255);DECLAREcurCURSORFORSELECTTABLE_NAMEFROMinformation_schema.TABLESWHERETABLE_SCHEMA='数据库名';DECLARECONTINUEHAND...
Here is a super simple SQL query to determine the size of all tables in a given database: SELECTTABLE_NAMEAS"Table",round(((data_length+index_length)/1024/1024),2)ASSize_in_MBFROMinformation_schema.TABLESWHEREtable_schema='my_db_name'ORDERBYSize_in_MBDESC ...
我们可以在 MySQL 自带的 information_schema 库中的 Table 表里,找到所需信息。 在每个 MySQL 实例中,都有一个独立的 information_schema 库,它是自带的默认库,记录着这个 MySQL 实例中所有数据库的元数据、统计信息、以及有关 MySQL 的访问权限信息。这其中就包括了所有数据库、表、索引的详细信息。 如果你想...
ORDER BY (data_length + index_length) DESC; """)tables=[]sizes=[]# 获取查询结果fortable,sizeincursor:tables.append(table)sizes.append(size)# 生成饼状图plt.figure(figsize=(10,7))plt.pie(sizes,labels=tables,autopct='%1.1f%%')plt.title('MySQL Table Sizes')plt.show()cursor.close()conn...
To check the sizes of all of your databases, at the mysql> prompt type the following command: CopySELECT table_schema AS "Database", ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)" FROM information_schema.TABLES GROUP BY table_schema; Depending on how many ...
SET@mysize='medium';CREATETABLEsizes ( size ENUM('small',@mysize,'large') ); We strongly recommend that you do not use numbers as enumeration values, because it does not save on storage over the appropriate TINYINT or SMALLINT type, and it is easy to mix up the strings and the unde...
Suppose also that the table has these data and index file sizes: -rw-rw---1 mysql mysql 9347072 Aug 19 11:47 person.MYD-rw-rw---1 mysql mysql 6066176 Aug 19 11:47 person.MYI Example ofmyisamchk -dvvoutput: MyISAM file: person Record format: Packed Character set: latin1_swedish...
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For example, if you add a new column to a table using Table::addColumn(), MySQL cannot see the new column. The only exception to this rule with regard to tables is that a change of name of an existing NDB table using Table::setName() is visible to MySQL. Calculating Table Sizes....
MySQL数据库是一款非常受欢迎的开源领域的重要的关系型数据库,由瑞典的MySQL AB公司开发,Mysql数据库现属于ORACLE公司,使的自身的商业数据库与开源数据库在市场上占有的份额都是跃居第一的位置,这时MySQL的主要开发者Michael widenius ,跳出来建立了一个MySQL分支数据