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: ...
mydb=# create user A with password '126.comM';CREATE ROLE mydb=# create user B with password '126.comM';# 授权用户Amydb=# grant select,update,delete on all tables in schema public to role1;GRANT mydb=# grant role1 to A with admin option;GRANT ROLE# 使用用户A登陆并把A用户得到的...
template1|postgres|UTF8|en_US.UTF-8|en_US.UTF-8|=c/postgres +|||postgres=CTc/postgres(3rows)postgres=# \c postgres # 切换数据库(相当于 use postgres)You are now connected to database"postgres"as user"postgres".postgres=# \d # 查看当前数据库中的表(相当于 show tables)Did notfindany ...
show tables; select * from C; 1. 2. 3. 4. 删除视图表 4、UNION 联集 将两个SQL语句的结果合并起来,两个SQL语句产生的字段需要是同样的资料种类 UNION:生成结果的资料值将没有重复,且按照字段的顺序进行排序。 语法:SELECT语句1 UNION SELECT语句2; UNION ALL:将生成结果的资料值都列出来,无论有无重复...
\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]; ...
> I used a DBeaver to connect to postgres but it does not show all tables in > a schema. > > Can anyone shed light on this? Permissions? -- Angular momentum makes the world go 'round. Re: DBeaver does not show all tables in a Schema ...
And when you have many tables, it’s hard to keep track of it all. Luckily, Postgres provides a lot of information that we can use to better understand its internals. For example, we can look at a table's n_dead_tup value to understand the current number of dead tuples, and relate...
dba_objects对象表里面直接查询owner字段的值也可以;创建模式, 右键模式新建模式删除模式:右键要删除的模式名字→删除→确定 命令行创建, Create schema +模式名authorization +模式所属用户名 删除模式:drop schema +模式名在all_tables表里面查询出之前安装数据库时,安装例子的表名字和所属的模式名: ...
Your Postgres commands in one place. Learn how to use psql to list and create Postgres databases, show your tables, enter your Postgres terminal, and more.
`Users` to 'myuser'@`myhost`; GRANT SELECT, SHOW VIEW ON mydatabase.`Visitors` to 'myuser'@`myhost`; 4. Select the statements for only the tables you would like to grant access to and run those queries. For example, if we only wanted to grant access to the Users and Visitors ...