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 ...
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...
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...
rpm-e--nodeps mysql-community-libs-8.0.13-1.el6.i686 #有则卸载 #将/var/lib/mysql文件夹下的所有文件都删除干净。 Step2、传安装文件到 linux 系统进行安装: #出于安全问题,建议使用 md5sum 命令核对一下文件源: md5sum mysql-5.7.24-linux-glibc2.12-i686.tar.gz mkdir/usr/local/msyql #/usr/local ...
However, if there are no tables you will get no output. sales=# \dt No relations found. sales=# After creating a table, it will be returned in a tabular list of created tables. sales=# CREATE TABLE leads (id INTEGER PRIMARY KEY, name VARCHAR); CREATE TABLE sales=# \dt List of ...
CREATETABLEperson(idINTNOTNULLAUTO_INCREMENT,last_nameVARCHAR(20)NOTNULL,first_nameVARCHAR(20)NOTNULL,birthDATE,deathDATE,PRIMARYKEY(id),INDEX(last_name,first_name),INDEX(birth))MAX_ROWS=1000000ENGINE=MYISAM; Suppose also that the table has these data and index file sizes: ...
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...
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 ...
As a result, CREATE TABLE ... ROW_FORMAT=COMPRESSED, INSERT, and UPDATE operations with row sizes very close to the maximum row size that were successful in earlier releases could now fail. To avoid this issue, test CREATE TABLE statements for compressed InnoDB tables with large rows on a ...
CharField(max_length=1, choices=SHIRT_SIZES) >>> p = Person(name="Fred Flintstone", shirt_size="L") >>> p.save() >>> p.shirt_size 'L' >>> p.get_shirt_size_display() 'Large' default 设置field的默认值。可以是可调用对象,也可以是某个值。如果是可调用对象,每次创建对象,都会被调用...