从csv文件中导入数据到Postgresql

从csv文件中导入数据到Postgresql已有表中,如果数据已经存在则更新,如果不存在则新建记录。

根据csv文件格式,先在postgresql中建立临时表:

=# create table tmp
  (no int,cname varchar,name varchar,dosage varchar,
    std varchar, number varchar,standard varchar,
    address varchar,is_base boolean,is_province_base boolean,
    provence varchar,remark varchar)

导入临时表:

=# copy tmp from '/tmp/20171228.csv' delimiter ',' csv;

更新已有表:

=# update oldtable set is_base=t.is_base,
    address=t.address, standard=t.standard,
    is_province_base=t.is_province_base,
    provence=t.provence, remark='2018-1-16'
    from (select number,is_base,address,standard,
      is_province_base,provence from tmp ) as t
      where trim(number)=trim(t.number);
UPDATE 804

插入原表中没有的新记录:

=# insert into oldtable
(number,name,provence,is_base,address,
  standard,std,cname,is_province_base)
  select number,name,provence,is_base,
  address,standard,std,cname,is_province_base
  from tmp where trim(number) not in
    (select trim(number) from oldtable);
INSERT 0 222
    原文作者:fanzhh
    原文地址: https://www.jianshu.com/p/aa2318bd78cb
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