db.dropDatabase(); 例:删除 bool 库 删除时,也是得先进入当前库下。 八:基本操作 插入 MongoDB存储的是文档,文档是json格式的象。 db.collectionName.insert(document); a):增加单篇文档,一条记录 例:db.stu.insert({"name":"lisi","age":24}); 注意:如果用户插入的记录中没有主键ID的场合,MongoDB...
1.showtables或showtables from database_name; -- 显示当前数据库中所有表的名称。2.showdatabases; -- 显示mysql中所有数据库的名称。3.showcolumns from table_name from database_name; 或showcolumns from database_name.table_name; show desctibe 表名 ...
Database pages :同样经过换算结果为 1042*16/1024=16.28MB,同样的方法,写条SQL,得出结果。 <mysql:8.0.31:information_schema>select name,concat(truncate(max_count/1024/1024,2),' MB')'databases_pages_size'from innodb_metrics where name ='buffer_pool_bytes_data'; +---+---+ | name | databas...
Actix Server Authentication with JWT and MongoDB: An implementation of JWT in Actix. Production-Grade Logging in Rust Applications: An article showcasing the use oftracingin an Actix application Fullstack-Rust: A Full Stack Rust application (Connect5 game) with Actix Web, Yew, Bulma CSS and ...
1 row in set (0.00 sec) Database pages :同样经过换算结果为 1042*16/1024=16.28MB,同样的方法,写条SQL,得出结果。 <mysql:8.0.31:information_schema>select name,concat(truncate(max_count/1024/1024,2),' MB') 'databases_pages_size' from innodb_metrics where name = 'buffer_pool_bytes_data';...
show tables或show tables from database_name; // 显示当前数据库中所有表的名称 show databases; // 显示mysql中所有数据库的名称 show...show grants for user_name@localhost; // 显示一个用户的权限,显示结果类似于grant 命令 show index from table_name; // 显示表的索引...show status; // 显示一...
<mysql:8.0.31:information_schema>selectname,concat(truncate(max_count/1024/1024,2),' MB')'databases_pages_size'frominnodb_metricswherename='buffer_pool_bytes_data';+---+---+|name|databases_pages_size|+---+---+|buffer_pool_bytes_data|16.28MB|+---+---+1rowinset(0.00sec) Free buffe...
MongoDB ___:YES Prometheus (OpenMetrics) Exporter ___:YES Prometheus Remote Write ___:YES Graphite ___:YES Graphite HTTP / HTTPS ___:YES JSON ___
1 row in set (0.00 sec) Database pages :同样经过换算结果为 1042*16/1024=16.28MB,同样的方法,写条SQL,得出结果。 <mysql:8.0.31:information_schema>select name,concat(truncate(max_count/1024/1024,2),' MB') 'databases_pages_size' from innodb_metrics where name = 'buffer_pool_bytes_data';...
Set a default database in the config. Then run the SHOW DATABASES and make a nested loop to get the tables for each (set the database using config() $tableNames = []; foreach (\DB::select('SHOW DATABASES') as $database) { config('database.connections.mysql.database', $database...