如何查找 MySQL 中表的当前大小(在内存中)?
mysqlmysqli database
要获取表的当前大小，请使用以下命令，它将显示有关表的详细信息，包括大小 −
show table status like ‘yourTableName’\G
首先我们创建一个表 −
mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> CustomerName varchar(20), -> CustomerAge int, -> CustomerCountryName varchar(20) -> ); Query OK, 0 rows affected (0.75 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(CustomerName,CustomerAge,CustomerCountryName) values('John',24,'US');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable(CustomerName,CustomerAge,CustomerCountryName) values('Carol',22,'UK');
Query OK, 1 row affected (0.14 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
+----+--------------+-------------+---------------------+ | Id | CustomerName | CustomerAge | CustomerCountryName | +----+--------------+-------------+---------------------+ | 1 | John | 24 | US | | 2 | Carol | 22 | UK | +----+--------------+-------------+---------------------+ 2 rows in set (0.00 sec)
以下查询用于查找表的当前大小(在内存中) −
mysql> show table status like 'DemoTable'\G
输出
*************************** 1. row *************************** Name: DemoTable Engine: InnoDB Version: 10 Row_format: Dynamic Rows: 0 Avg_row_length: 0 Data_length: 16384 Max_data_length: 0 Index_length: 0 Data_free: 0 Auto_increment: NULL Create_time: 2019-06-10 16:35:55 Update_time: NULL Check_time: NULL Collation: utf8_unicode_ci Checksum: NULL Create_options: Comment: 1 row in set (0.01 sec)
