從csv文件中導(dǎo)入數(shù)據(jù)到Postgresql已有表中，如果數(shù)據(jù)已經(jīng)存在則更新，如果不存在則新建記錄。
根據(jù)csv文件格式，先在postgresql中建立臨時表：
=# 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)
導(dǎo)入臨時表：
=# 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
插入原表中沒有的新記錄：
=# 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
