1、查看所有数据 show databases;2、使用数据库 use 数据库名字;3、查看当前使用的数据库 select database();4、创建数据库 create database 数据库名字 charset='utf8'5、删除数据库 drop database 数据库名字; 二、数据表操作 1、查看当前数据库中的所有表 show tables;2、查看表结构 desc 表名字;3、创建...
I would expect by ticking show all databases in preferences that it is sufficient to see all databases and that I don't need to open the postgresqltab. This is a bug. It would work if you don't set the general preferences which means you have to set them for each connection individuall...
1、显示数据库列表。 show databases; 2、显示库中的数据表: use mysql; show tables; 3、显示数据表的结构: describe 表名; 4、建库: create database 库名; 5、建表: use 库名; create table 表名 (字段设定列表); 6、删库和删表: drop database 库名; drop table 表名; 7、将表中记录清空: ...
$ psql -U postgres# 使用postgres用户登录psql(10.16(Ubuntu10.16-0ubuntu0.18.04.1))Type"help"forhelp.postgres=# \l # 查看所有数据库(相当于 show databses)List of databases Name|Owner|Encoding|Collate|Ctype|Access privileges ---+---+---+---+---+--- postgres|postgres|UTF8|en_US.UTF-8...
$ psql (连接数据库,默认用户和数据库都是postgres) $ psql -U <user> -d <dbname> 数据库操作 // 列举数据库,相当于show databases 1 $ \l // 切换数据库,相当与use dbname 1 $ \c <dbname> // 列举表,相当与show tables 1 $ \dt // 查看表结构,相当于desc 1 $ \d tblname //...
\l (相当于mysql 的show databases) 11列举表 \dt (相当于mysql 的show tables) 12查看表结构 \d tblname (相当于mysql 的 desc tblname , show columns from tbname) 13查看索引 \di 表操作: 1改变表名 alter table [表名A] rename to [表名B]; ...
列举数据库,相当于mysql的show databases 代码语言:javascript 复制 ambari=> \l List of databases Name | Owner | Encoding | Collate | Ctype | Access privileges ---+---+---+---+---+--- ambari | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =Tc/postgres + | | | | | postg...
PostgreSQL 运行时的参数设置可以通过SHOW语句进行查看:SHOW nameSHOW ALL例如:hrdb=> show shared_buffers; shared_buffers --- 256MB(1 row)运行时的参数可以通过SET语句、修改 postgresql.conf 配置文件、设置 PGOPTIONS 环境变量(使用 libpq 或者基于 libpq应用连接)或者启动服务时的命令行参数进行设置。使用SET...
After completing the upgrade on all nodes, while connected to one of the nodes, you can check your versions again: → WrapCopy sudo-upostgres pgd show-version The output will be similar to the following: → WrapCopy Node BDR Version Postgres Version ...
One of the most common questions I get from people running Postgres databases at scale is: How do I optimize the I/O operations of my database? Historically, getting a complete picture of all the I/O produced by a Postgres server has been challenging. To start with, Postgres splits its...