我需要完成查询以从临时表tmp_x添加表CREATE TEMP TABLE tmp_x AS SELECT * FROM testcsv2 LIMIT 0;
COPY tmp_x FROM 'D:\water_utility2.csv' (FORMAT csv);
UPDATE testcsv2
SET record = tmp_x.record, "Battery Voltage" = tmp_x."Battery Voltage"
FROM tmp_x
WHERE testcsv2.timestamp = tmp_x.timestamp;
DROP TABLE tmp_x;
中不存在的行：
TABLE testcsv2
(TIMESTAMP timestamp, RECORD double precision, "Battery Voltage" double precision);
请帮帮我吗？
更新
tmp_x表2009-12-31 23:00:00,112086,13.56197
2009-12-31 23:15:00,102087,23.56113
2009-12-31 23:30:00,102088,13.56449
2010-01-01 23:45:00,102089,13.57373
具有相同的列。填写来自csv的那个：
combn答案 0 :(得分：0)
试试这个：
insert into testcsv2 select * from (
select x.*
from tmp_x x
left outer join testcsv2 t on t. timestamp = x. timestamp
where t. timestamp is null
) as missing;