Greenplum-PostgreSQL常用操作和SQL语句

PSQL命令相关

查询版本信息

select version();
- 查询版本详细信息
show server_version;
- 查询版本号
show server_version_num;
- 查看数字版本信息包括小版本号(无下划线和点等符号)

testdb=# select version();                                                                                   
 PostgreSQL 9.4.26 (Greenplum Database 6.19.0 build commit:c88801925e5d51e4be57f54ff2158ed74a264b8e Open Source) on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 6.4.0, 64-bit compiled o
n Dec  8 2021 23:08:44
(1 row)

testdb=# show server_version;
 server_version
----------------
 9.4.26
(1 row)

testdb=# show server_version_num;
 server_version_num
--------------------
 90426
(1 row)

创建数据库

testdb=# create database info_user;
CREATE DATABASE

修改数据库

重命名数据库名称

testdb=# alter database info_user rename to user_info;
ALTER DATABASE

修改数据库并发连接数量

testdb=# alter database user_info connection limit 150;
ALTER DATABASE

删除数据库

testdb=# drop database if exists user_info；

查看数据库

-- \l

testdb=# \l
                               List of databases
   Name    |  Owner  | Encoding |  Collate   |   Ctype    |  Access privileges
-----------+---------+----------+------------+------------+---------------------
 dingyj    | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 dmcpgsdb  | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 postgres  | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 template0 | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 | =c/gpadmin         +
           |         |          |            |            | gpadmin=CTc/gpadmin
 template1 | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 | =c/gpadmin         +
           |         |          |            |            | gpadmin=CTc/gpadmin
 testdb    | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 user_info | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
(7 rows)

切换进入数据库

-- \c
testdb=# \c dmcpgsdb
You are now connected to database "dmcpgsdb" as user "gpadmin".
dmcpgsdb=#

显示所有的schema

-- \dn
dmcpgsdb=# \dn
        List of schemas
         Name         |  Owner
----------------------+---------
 dmcpgsdb_read_schema | gpadmin
 gp_toolkit           | gpadmin
 public               | gpadmin
(3 rows)

显示所有的用户

-- \du
dmcpgsdb=# \du
                                 List of roles
 Role name |                       Attributes                     | Member of
-----------+------------------------------------------------------+-----------
 dingyj    |                                                      | {}
 gpadmin   | Superuser,Ext gpfdist Table, Wri Ext gpfdist Table   | {}
 testro    |                                                      | {}
 wangt     |                                                      | {}

显示表的权限分配情况

dmcpgsdb=# \dp ada_n042_fda_punish
                                     Access privileges
 Schema |        Name         | Type  |    Access privileges    | Column access privileges
--------+---------------------+-------+-------------------------+--------------------------
 public | ada_n042_fda_punish | table | gpadmin=arwdDxt/gpadmin+|
        |                     |       | wangt=r/gpadmin         |
(1 row)

不加表名则显示全部

以列的形式展示数据

dmcpgsdb-# \x
Expanded display is on.
dmcpgsdb=# select rec_id,inv from amr_n042_company_inv limit 2;
-[ RECORD 1 ]------------
rec_id | 683cdf2dda657390
inv    | 黄秀英
-[ RECORD 2 ]------------
rec_id | 3be2c6a663402c80
inv    | 马美霞

-- 当不想列展示时，再次\x即可
dmcpgsdb=# \x
Expanded display is off.
dmcpgsdb=# select rec_id,inv from amr_n042_company_inv limit 2;
      rec_id      |  inv
------------------+--------
 73749551b10d5efc | 田英
 47a370afaa75b84b | 李挪英
(2 rows)

查看表结构

dmcpgsdb=# \d amr_n042_company_inv
         Table "public.amr_n042_company_inv"
     Column      |          Type          | Modifiers
-----------------+------------------------+-----------
 rec_id          | character varying(64)  |
 eid             | character varying(64)  |
 inv             | character varying(300) |
 pid             | character varying(64)  |
 eid_inv         | character varying(64)  |
 inv_type        | character varying(50)  |
 blic_type       | character varying(50)  |
 blic_no         | text                   |
 country         | character varying(50)  |
 currency        | character varying(50)  |
 sub_conam       | numeric(38,6)          |
 acc_conam       | numeric(38,6)          |
 sub_conam_usd   | numeric(38,6)          |
 acc_conam_usd   | numeric(38,6)          |
 con_prop        | numeric(38,6)          |
 sharehd_num     | bigint                 |
 is_listed       | integer                |
 con_form        | text                   |
 con_date        | character varying(10)  |
 anche_year_date | character varying(30)  |
 rnk_conp        | integer                |
 update_time     | character varying(30)  |
 delete_flg      | character(1)           |
Indexes:
    "ix_amr_n042_company_inv_eid" btree (eid)
    "ix_amr_n042_company_inv_eid_inv" btree (eid_inv)
    "ix_amr_n042_company_inv_pid" btree (pid)
Distributed by: (rec_id)

导出查询数据到文件

-- \o 指定本地环境路径
dmcpgsdb=# \o /home/gpadmin/company_inv.txt
-- 执行需要导出数据的SQL
dmcpgsdb=# select rec_id,inv from amr_n042_company_inv limit 5;

-- 查看验证
gpadmin@gpmaster:/home/gpadmin >ll /home/gpadmin/company_inv.txt
-rw-rw-r-- 1 gpadmin gpadmin 213 Dec 27 17:04 /home/gpadmin/company_inv.txt
gpadmin@gpmaster:/home/gpadmin >cat /home/gpadmin/company_inv.txt
      rec_id      |  inv
------------------+--------
 683cdf2dda657390 | 黄秀英
 3be2c6a663402c80 | 马美霞
 604c930953200df1 | 张彦岗
 3be3ca37602a0e19 | 王惠
 52b9b19298f5a1a4 | 黄小红
(5 rows)

查看数据库状态

dmcpgsdb=# select datid, datname, pid, client_addr, client_port, query_start, backend_start from pg_stat_activity;
 datid | datname  |  pid   | client_addr | client_port |          query_start          |         backend_start
-------+----------+--------+-------------+-------------+-------------------------------+-------------------------------
 16385 | dmcpgsdb |   4948 | 11.8.88.88  |       22019 | 2022-12-27 16:57:29.790592+08 | 2022-12-27 16:57:29.775261+08
 16385 | dmcpgsdb |   5188 | 11.8.88.88  |       63291 | 2022-12-27 16:59:52.481708+08 | 2022-12-27 16:59:52.465111+08
 16385 | dmcpgsdb |   5331 | 11.8.88.88  |       22281 | 2022-12-27 17:01:13.920819+08 | 2022-12-27 17:01:13.904222+08
 16385 | dmcpgsdb |   3714 | 11.8.88.88  |       21093 | 2022-12-27 16:45:10.809441+08 | 2022-12-27 16:45:10.7932+08
 16385 | dmcpgsdb |   4724 | 11.8.88.88  |       57582 | 2022-12-27 16:55:17.496382+08 | 2022-12-27 16:55:17.479785+08
 16385 | dmcpgsdb |   4376 | 11.8.88.88  |       57411 | 2022-12-27 16:51:44.541171+08 | 2022-12-27 16:51:44.52488+08
 16385 | dmcpgsdb |   4437 | 11.8.88.88  |       57443 | 2022-12-27 16:52:24.104285+08 | 2022-12-27 16:52:24.088149+08
 16385 | dmcpgsdb |   4100 | 11.8.88.88  |       57294 | 2022-12-27 16:49:08.820976+08 | 2022-12-27 16:49:08.805455+08

查看数据库连接进程每个服务器进程一行，显示数据库OID、数据库名、进程ID、客户端地址、客户端端口、最近查询时间、进程开始时间

用户相关

查询用户

testdb=# select usename from pg_user;
 usename
---------
 gpadmin
 dingyj
(2 rows)

创建用户

注意: 创建的用户不赋予权限时，默认无任何操作权限

testdb=# CREATE USER wangt WITH PASSWORD 'wangt_666';
gpadmin@gpmaster:/home/gpadmin >psql -U wangt -d dmcpgsdb -h 11.8.8.8 -W
Password for user wangt:
psql (9.4.26)
Type "help" for help.

dmcpgsdb=> select rec_id,inv,update_time from amr_n042_company_inv limit 1;
ERROR:  permission denied for relation amr_n042_company_inv

为普通用户给予只读权限

-- 用户以上方创建的wangt为例

-- 切换至需要赋权操作的数据库
testdb=# \c dmcpgsdb
You are now connected to database "dmcpgsdb" as user "gpadmin".


-- 设置为只读的transaction(设置用户默认开启只读事务)
dmcpgsdb=# alter user wangt set default_transaction_read_only = on;
ALTER ROLE

-- 创建SCHEMA
dmcpgsdb=# create schema dmcpgsdb_read_schema;
CREATE SCHEMA

-- 默认在postgres数据库的public模式下的对象是可以访问的：
-- 首先要有使用schema的权限：
dmcpgsdb=# grant usage on schema dmcpgsdb_read_schema to wangt;
GRANT

-- 然后加所有表的只读权限：
dmcpgsdb=# grant select on all tables in schema public to wangt;
GRANT

-- 使用普通用户登录访问验证
gpadmin@gpmaster:/home/gpadmin >psql -U wangt -d dmcpgsdb -h 11.8.8.8 -W
Password for user wangt:
psql (9.4.26)
Type "help" for help.

-- 可以正常查询数据
dmcpgsdb=> select rec_id,inv,update_time from amr_n042_company_inv limit 1;
      rec_id      |  inv   |     update_time
------------------+--------+---------------------
 683cdf2dda657390 | 黄秀英 | 2022-10-03 07:31:53
(1 row)

-- 建表语句没有权限
dmcpgsdb=> create table testaaa (id int);
ERROR:  transaction is read-only

-- 删表没有权限
dmcpgsdb=> drop table amr_n042_company_inv;
ERROR:  transaction is read-only

-- 表数据操作没有权限
dmcpgsdb=> insert into amr_n042_company_inv select * from amr_n042_company_inv limit 1;
ERROR:  permission denied for relation amr_n042_company_inv

显示内部命令查询语句

psql -E 显示内部命令生成的查询

示例：

gpadmin@gpmaster:/home/gpadmin >psql
psql (9.4.26)
Type "help" for help.

testdb=# \l
                               List of databases
   Name    |  Owner  | Encoding |  Collate   |   Ctype    |  Access privileges
-----------+---------+----------+------------+------------+---------------------
 dingyj    | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 dmcpgsdb  | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 postgres  | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 template0 | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 | =c/gpadmin         +
           |         |          |            |            | gpadmin=CTc/gpadmin
 template1 | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 | =c/gpadmin         +
           |         |          |            |            | gpadmin=CTc/gpadmin
 testdb    | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
(6 rows)

testdb=#


gpadmin@gpmaster:/home/gpadmin >psql -E
psql (9.4.26)
Type "help" for help.

testdb=# \l
********* QUERY **********
SELECT d.datname as "Name",
       pg_catalog.pg_get_userbyid(d.datdba) as "Owner",
       pg_catalog.pg_encoding_to_char(d.encoding) as "Encoding",
       d.datcollate as "Collate",
       d.datctype as "Ctype",
       pg_catalog.array_to_string(d.datacl, E'\n') AS "Access privileges"
FROM pg_catalog.pg_database d
ORDER BY 1;
**************************

                               List of databases
   Name    |  Owner  | Encoding |  Collate   |   Ctype    |  Access privileges
-----------+---------+----------+------------+------------+---------------------
 dingyj    | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 dmcpgsdb  | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 postgres  | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
 template0 | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 | =c/gpadmin         +
           |         |          |            |            | gpadmin=CTc/gpadmin
 template1 | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 | =c/gpadmin         +
           |         |          |            |            | gpadmin=CTc/gpadmin
 testdb    | gpadmin | UTF8     | en_US.utf8 | en_US.utf8 |
(6 rows)

PSQL交互界面清屏

\! clear

持续重复运行一个查询语句

\watch

示例:

testdb=# \watch select NOW();
Watch every 1s  Mon Dec 26 15:01:18 2022

              now
-------------------------------
 2022-12-26 15:01:18.908637+08
(1 row)

Watch every 1s  Mon Dec 26 15:01:19 2022

              now
-------------------------------
 2022-12-26 15:01:19.912506+08
(1 row)

Watch every 1s  Mon Dec 26 15:01:20 2022

              now
-------------------------------
 2022-12-26 15:01:20.915686+08
(1 row)

运行脚本文件

\i filename

示例：

gpadmin@gpmaster:/home/gpadmin >cat test.sql
select * from amr_n042_company_inv limit 1

gpadmin@gpmaster:/home/gpadmin >psql
psql (9.4.26)
Type "help" for help.

testdb=# \c dmcpgsdb
You are now connected to database "dmcpgsdb" as user "gpadmin".
dmcpgsdb=# \i test.sql
      rec_id      |         eid         | inv  |               pid                | eid_inv | inv_type | blic_type | blic_no | country | currency | sub_conam  | acc_conam  | sub_conam_usd
| acc_conam_usd | con_prop  | sharehd_num | is_listed | con_form | con_date | anche_year_date | rnk_conp |     update_time     | delete_flg
------------------+---------------------+------+----------------------------------+---------+----------+-----------+---------+---------+----------+------------+------------+---------------
+---------------+-----------+-------------+-----------+----------+----------+-----------------+----------+---------------------+------------
 73749551b10d5efc | 1914401017640250210 | 田英 | 82546bfffff972f6cb478d002b27b250 |         | 20       |           | 20      | 156     | 156      | 275.000000 | 275.000000 |
|               | 50.000000 |             |         0 | 货币     |          |                 |        1 | 2022-08-17 06:29:55 | 0
(1 row)

功能性&管理性语句与配置

执行SQL超时阻止运行

-- ALTER DATABASE database_name SET statement_timeout = '60s';
-- 示例:
ALTER DATABASE dmcpgsdb SET statement_timeout = '60s';

设置SQL语句的执行时间过长运行则会阻止任务运行

监控数据库连接

SELECT count(*), state
FROM pg_stat_activity
GROUP BY state;

 count |        state
-------+---------------------
     1 | idle in transaction
     1 | active
    32 | idle
(3 rows)

idle in transaction 事务中空闲连接

active 活跃连接

idle 空闲连接

查看表的文件占用大小

-- 字节显示 SELECT pg_relation_size('table_name');
-- 示例:
SELECT pg_relation_size('amr_n042_company_inv');
 
 pg_relation_size
------------------
      30689853440
(1 row)

-- 显示格式(合理的文件大小单位) SELECT pg_size_pretty(pg_relation_size('table_name'));
-- 示例:
SELECT pg_size_pretty(pg_relation_size('amr_n042_company_inv'));

 pg_size_pretty
----------------
 29 GB
(1 row)

查看全部表的大小

SELECT relname AS relation,
       pg_size_pretty (
         pg_total_relation_size (C .oid)
       ) AS total_size
FROM pg_class C
LEFT JOIN pg_namespace N ON (N.oid = C .relnamespace)
WHERE nspname NOT IN (
        'pg_catalog',
        'information_schema'
      )
  AND C .relkind <> 'i'
  AND nspname !~ '^pg_toast'
  ORDER BY pg_total_relation_size (C .oid) DESC
LIMIT 10;

               relation                | total_size
---------------------------------------+------------
 amr_n042_company_ar_capital           | 65 GB
 app_ent_region_nic_rank               | 60 GB
 amr_n042_company_manager              | 53 GB
 amr_n042_company_modify               | 52 GB
 amr_n042_company_inv                  | 46 GB
 amr_n042_company_ar_socialfee         | 45 GB
 amr_n042_company_ar                   | 31 GB
 taj_n042_court_execute                | 16 GB
 amr_n042_company_ar_modify            | 11 GB
 app_ent_financial_var_nic_rank_latest | 9661 MB
(10 rows)

不加limit则列出全部从大到小占用的表清单排列

开启慢查询记录功能

ALTER database postgres SET log_min_duration_statement = '250ms';

执行时间等于或者大于 log_min_duration_statement 设置值的参数时，sql语句会被记录到日志

检查未使用的索引占用

SELECT schemaname || '.' || relname AS table, indexrelname AS index
	, pg_size_pretty(pg_relation_size(i.indexrelid)) AS "index size", idx_scan AS "index scans"
FROM pg_stat_user_indexes ui
	JOIN pg_index i ON ui.indexrelid = i.indexrelid
WHERE NOT indisunique
	AND idx_scan < 50
	AND pg_relation_size(relid) > 5 * 8192
ORDER BY pg_relation_size(i.indexrelid) / nullif(idx_scan, 0) DESC NULLS FIRST, pg_relation_size(i.indexrelid) DESC
LIMIT 10;

                table                 |                index                 | index size | index scans
--------------------------------------+--------------------------------------+------------+-------------
 public.amr_n042_company_ar_capital   | ix_amr_n042_company_ar_capital_eid   | 14 GB      |           0
 public.amr_n042_company_modify       | ix_amr_n042_company_modify_eid       | 11 GB      |           0
 public.amr_n042_company_manager      | ix_amr_n042_company_manager_pid      | 11 GB      |           0
 public.app_ent_region_nic_rank       | ix_app_ent_region_nic_rank_eid       | 10 GB      |           0
 public.amr_n042_company_ar           | ix_amr_n042_company_ar_eid           | 9618 MB    |           0
 public.amr_n042_company_ar_socialfee | ix_amr_n042_company_ar_socialfee_eid | 8179 MB    |           0
 public.amr_n042_company_manager      | ix_amr_n042_company_manager_eid      | 7925 MB    |           0
 public.amr_n042_company_inv          | ix_amr_n042_company_inv_pid          | 7890 MB    |           0
 public.amr_n042_company_inv          | ix_amr_n042_company_inv_eid          | 5991 MB    |           0
 public.amr_n042_company_inv          | ix_amr_n042_company_inv_eid_inv      | 3504 MB    |           0
(10 rows)

按照索引大小降序排列，列出全部去掉limit限制

评估表中的数据量

SELECT reltuples::numeric as count
FROM pg_class
WHERE relname='table_name';

-- 示例：
SELECT reltuples::numeric as count
FROM pg_class
WHERE relname='amr_n042_company_inv';

   count
-----------
 156361000
(1 row)


select count(*) from amr_n042_company_inv;
   count
-----------
 156352907
(1 row)

对于上亿的数据量，统计出的结果仅仅0.005%误差，所以对于精度要求不是严格必须准确1条无误的情况下，可以使用评估方式，结果无耗时，count相对来说耗时耗性能

评估表中的数据量基于内部统计信息返回表中的近似数据量

记录查询占用的时间

返回SQL查询占用的时间，包括网络传输时间在内

\timing

示例：

-- 普通查询
dmcpgsdb=# select count(*) from amr_n042_company_ar;
   count
-----------
 251031650
(1 row)

-- 通过\timing开启计时功能
dmcpgsdb=# \timing
Timing is on.

-- 计时查询效果
dmcpgsdb=# select count(*) from amr_n042_company_ar;
   count
-----------
 251031650
(1 row)

Time: 42631.350 ms

格式化查询结果

格式化查询提高查询结果的可读性

\x auto

示例：

-- 普通查询
dmcpgsdb=# select * from amr_n042_company_inv limit 1;
      rec_id      |         eid         |  inv   |               pid                | eid_inv | inv_type | blic_type | blic_no | country | currency | sub_conam | acc_conam | sub_conam_usd
| acc_conam_usd | con_prop  | sharehd_num | is_listed | con_form |  con_date  | anche_year_date | rnk_conp |     update_time     | delete_flg
------------------+---------------------+--------+----------------------------------+---------+----------+-----------+---------+---------+----------+-----------+-----------+---------------
+---------------+-----------+-------------+-----------+----------+------------+-----------------+----------+---------------------+------------
 f349085e85b3daff | 1931505225641865849 | 张连财 | b69edd6c64d55e5d74c0645d98fa0b00 |         | 20       |           |         | 156     | 156      | 20.000000 |  0.000000 |      0.000000
|      0.000000 | 10.000000 |             |         0 | 实物     | 2010-11-17 |                 |        2 | 2022-09-29 07:34:05 | 0
(1 row)

-- 通过\x auto开启格式化查询结果
dmcpgsdb=# \x auto
Expanded display is used automatically.

-- 计格式化查询效果
dmcpgsdb=# select * from amr_n042_company_inv limit 1;
-[ RECORD 1 ]---+---------------------------------
rec_id          | f349085e85b3daff
eid             | 1931505225641865849
inv             | 张连财
pid             | b69edd6c64d55e5d74c0645d98fa0b00
eid_inv         |
inv_type        | 20
blic_type       |
blic_no         |
country         | 156
currency        | 156
sub_conam       | 20.000000
acc_conam       | 0.000000
sub_conam_usd   | 0.000000
acc_conam_usd   | 0.000000
con_prop        | 10.000000
sharehd_num     |
is_listed       | 0
con_form        | 实物
con_date        | 2010-11-17
anche_year_date |
rnk_conp        | 2
update_time     | 2022-09-29 07:34:05
delete_flg      | 0

重新编辑最后一次SQL语句执行

调用文本编辑器功能，可以打开并编辑最后一次SQL执行的查询语句并二次执行

\e

示例：

-- 例如平时SQL语句输入错误时，一般会光标按上找出上一句SQL修改，但是当SQL语句非常长时，使用\e编辑非常直观易用
dmcpgsdb=# select * from amr_n042_company_inv limitttt 1;
ERROR:  syntax error at or near "1"
LINE 1: select * from amr_n042_company_inv limitttt 1;
                                                    ^
-- 进入末次SQL编辑界面,:q退出或者:wq均可触发sql执行
dmcpgsdb=# \e
-[ RECORD 1 ]---+---------------------------------
rec_id          | 683cdf2dda657390
eid             | 1933506273156624479
inv             | 黄秀英
pid             | 74a9dfb2c89d54373e04c63031fa75ce
eid_inv         |
inv_type        | 20
blic_type       |
blic_no         | 20
country         |
currency        | 156
sub_conam       | 40.000000
acc_conam       | 0.000000
sub_conam_usd   | 5.900000
acc_conam_usd   |
con_prop        | 5.000000
sharehd_num     |
is_listed       | 0
con_form        | 货币
con_date        | 2019-10-11
anche_year_date |
rnk_conp        | 2
update_time     | 2022-10-03 07:31:53
delete_flg      | 0

空值的显示内容设置

将空值 null 显示为其它字符，方便区分空值和空字符串

\pset null ⛔

符号自定义，根据需求定义即可。

示例：

-- 普通查询
dmcpgsdb=# select * from amr_n042_company_inv limit 1;
rec_id          | 683cdf2dda657390
eid             | 1933506273156624479
inv             | 黄秀英
pid             | 74a9dfb2c89d54373e04c63031fa75ce
eid_inv         |
inv_type        | 20
blic_type       |
blic_no         | 20
country         |
currency        | 156
sub_conam       | 40.000000
acc_conam       | 0.000000
sub_conam_usd   | 5.900000
acc_conam_usd   |
con_prop        | 5.000000
sharehd_num     |
is_listed       | 0
con_form        | 货币
con_date        | 2019-10-11
anche_year_date |
rnk_conp        | 2
update_time     | 2022-10-03 07:31:53
delete_flg      | 0

-- 开启置换
dmcpgsdb=# \pset null ⛔
Null display is "⛔".

-- 验证效果
dmcpgsdb=# select * from amr_n042_company_inv limit 1;
rec_id          | 73749551b10d5efc
eid             | 1914401017640250210
inv             | 田英
pid             | 82546bfffff972f6cb478d002b27b250
eid_inv         | ⛔
inv_type        | 20
blic_type       | ⛔
blic_no         | 20
country         | 156
currency        | 156
sub_conam       | 275.000000
acc_conam       | 275.000000
sub_conam_usd   | ⛔
acc_conam_usd   | ⛔
con_prop        | 50.000000
sharehd_num     | ⛔
is_listed       | 0
con_form        | 货币
con_date        | ⛔
anche_year_date | ⛔
rnk_conp        | 1
update_time     | 2022-08-17 06:29:55
delete_flg      | 0

Greenplum-PostgreSQL常用操作语句

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切换进入数据库

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用户相关

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运行脚本文件

功能性&管理性语句与配置

执行SQL超时阻止运行

监控数据库连接

查看表的文件占用大小

查看全部表的大小

开启慢查询记录功能

评估表中的数据量

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格式化查询结果

重新编辑最后一次SQL语句执行

空值的显示内容设置

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Greenplum-PostgreSQL常用操作语句

Greenplum-PostgreSQL常用操作和SQL语句

PSQL命令相关

查询版本信息

创建数据库

修改数据库

重命名数据库名称

修改数据库并发连接数量

删除数据库

查看数据库

切换进入数据库

显示所有的schema

显示所有的用户

显示表的权限分配情况

以列的形式展示数据

查看表结构

导出查询数据到文件

查看数据库状态

查看数据库连接进程 每个服务器进程一行，显示数据库OID、数据库名、进程ID、客户端地址、客户端端口、最近查询时间、进程开始时间

用户相关

查询用户

创建用户

为普通用户给予只读权限

显示内部命令查询语句

PSQL交互界面清屏

持续重复运行一个查询语句

运行脚本文件

功能性&管理性语句与配置

执行SQL超时阻止运行

监控数据库连接

查看表的文件占用大小

查看全部表的大小

开启慢查询记录功能

评估表中的数据量

记录查询占用的时间

格式化查询结果

重新编辑最后一次SQL语句执行

空值的显示内容设置

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查看数据库连接进程每个服务器进程一行，显示数据库OID、数据库名、进程ID、客户端地址、客户端端口、最近查询时间、进程开始时间