how to "group" several records with same timestamp into one line?
| От | zxo102 ouyang |
|---|---|
| Тема | how to "group" several records with same timestamp into one line? |
| Дата | |
| Msg-id | 73ccced30811120259q788358f6s6bf9e7122ef66a15@mail.gmail.com обсуждение исходный текст |
| Ответы |
Re: how to "group" several records with same timestamp
into one line?
Re: how to "group" several records with same timestamp into one line? |
| Список | pgsql-general |
Hi everyone,
My data with same timestamp "2008-11-12 12:12:12" in postgresql are as follows
rowid data unit channel create_on
------------------------------------------------------------------------------
1 1.5 MPa channel1 2008-11-12 12:12:12
2 2.5 M3 channel2 2008-11-12 12:12:12
3 3.5 M3 channel3 2008-11-12 12:12:12
4 4.5 t channel4 2008-11-12 12:12:12
------------------------------------------------------------------------------
I would like to "group" them into one line with SQL like
1.5 MPa 2.5 M3 3.5 M3 4.5 t 2008-11-12 12:12:12
The table is defined as
CREATE TABLE record_data
(
rowid serial NOT NULL,
data double precision,
unit character(10),
(
rowid serial NOT NULL,
data double precision,
unit character(10),
channel character(20),
create_on timestamp
create_on timestamp
)
Is that possible? Thanks for your help in advance.
Ouyang
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