參考官網地址：

之後更改postgresql.conf

#vim /var/lib/pgsql/9.6/data/postgresql.conf  
listen_address = '*' 
port = 5432  

更改pg_hba.conf

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     peer
# IPv4 local connections:
 

host    all             all             127.0.0.1/32            ident
host    all             all             0.0.0.0/0               md5

# IPv6 local connections:
host    all             all             ::1/128                 ident
# Allow replication connections from localhost, by a user with the
# replication privilege.
 

#local   replication     postgres                                peer
#host    replication     postgres        127.0.0.1/32            ident
#host    replication     postgres        ::1/128                 ident
local   replication     postgres                                trust
host    replication     postgres        127.0
 
.0.1/32            trust
host    replication     postgres        ::1/128                 trust

之後發現如下, 連不上

psql -U postgres -h xxxx

原因是沒有設定postgres的密碼，於是

#psql
postgres=# ALTER USER postgres WITH PASSWORD 'postgres';
ALTER ROLE

重啟服務搞定

Postgresql 常用資料型別總結：

https://www.cnblogs.com/stephen-liu74/archive/2012/04/30/2293602.html

新建一個數據庫：

postgres=# CREATE DATABASE real_estate_trans
postgres-# ;

新建一個schema：

CREATE SCHEMA IF NOT EXISTS hangzhou;

建立一張表：

CREATE TABLE hangzhou.trans_daily_info (  
    trans_date DATE NOT NULL,  
    downtown_new_trans SMALLINT NOT NULL,
    downtown_new_vol INTEGER NOT NULL,
    xiaoshan_new_trans SMALLINT NOT NULL,
    xiaoshan_new_vol INTEGER NOT NULL,
    yuhang_new_trans SMALLINT NOT NULL,
    yuhang_new_vol INTEGER NOT NULL,
    fuyang_new_trans SMALLINT NOT NULL,
    fuyang_new_vol INTEGER NOT NULL,
    djd_new_trans SMALLINT NOT NULL,
    djd_new_vol INTEGER NOT NULL,
    urban_new_daily_trans SMALLINT NOT NULL,
    urban_new_daily_vol INTEGER NOT NULL,
    other4county_new_qty SMALLINT NOT NULL,
    other4country_new_vol INTEGER NOT NULL,
    downtown_old_qty SMALLINT NOT NULL,
    PRIMARY KEY (trans_date)  
);