You should be able to just runselect * from information_schema.tablesto get a listing of every table being managed by Postgres for a particular database. You can also add awhere table_schema = 'information_schema'to see just the tables in the information schema. The viewpg_tablesprovides a...
8. 获取 Postgres 中所有数据库的列表及其大小(以 GB 为单位),按最大大小排序 SELECT pg_database.datnameas"database_name", pg_database_size(pg_database.datname)/1024/1024/1024AS size_in_GB FROM pg_database ORDER by size_in_GB DESC; database_name|size_in_gb---+---mumbai|422template1...
postgres=# \df List of functionsSchema | Name | Result data type | Argument data types | Type---+---+---+---
A single PostgreSQL server can contain many databases. Let’s explore three different approaches to list databases in PostgreSQL!
[,...] | ALL [ PRIVILEGES ] } ON DATABASE db_name [, ...] TO { username | GROUP group_name | PUBLIC } [, ...] [ WITH GRANT OPTION ] GRANT { CREATE | ALL [ PRIVILEGES ] } ON TABLESPACE tablespace_name [, ...] TO { username | GROUP group_name | PUBLIC } [, ...]...
postgres=# \c postgres tbase 172.16.0.4715432 You are now connected to database"postgres" as user "tbase" on host "172.16.0.47"at port "15432". 3.19.2.3 显示和设置该连接当前运行参数 ●显示当前连接的运行参数。 postgres=# SELECT CURRENT_USER; current_user --- tbase (1 row) postgres=# sh...
数据库对象和对象符号标识可以通过pg database和pg classs查询,代表数据库和对象之间映射。 另外集群在物理磁盘中通过文件目录形式展示,一个目录对应一个数据库,也就是一个base下子目录中有一个目录就是有一个数据库。 数据库对象和对象符号标识 base 目录一个文件对应一个数据库,个人实验的映射如下:1:template1 ...
Keyset tables store a list of selected rows when an ArcGIS client executes a geodatabase relationship query that joins tables using attributes that are type integer, number, date, or string. They accommodate joins using attributes other than the Object ID field. No keyset tables are pre...
Query below lists all primary keys constraints (PK) in the database with theircolumns(one row per column). See also:list of all primary keys (one row per PK). Query select kcu.table_schema, kcu.table_name, tco.constraint_name,
{ RelFileNode rnode; /* physical relation identifier */ typedef struct RelFileNode { Oid spcNode; /* tablespace */ Oid dbNode; /* database */ Oid relNode; /* relation */ } RelFileNode; ForkNumber forkNum; // tables, freespace maps and visibility maps are defined in 0, 1 and 2 ...