From: litu16 <litumelendez@gmail.com>
To: pgsql-admin@postgresql.org
Subject: SUM all timeelapse WHERE timetype = 'Break' but only the rows that are after(below) timetype = 'Start'
Date: Sat, 27 Jun 2015 22:56:16 -0700 (MST)
Message-ID: <1435470976136-5855509.post@n5.nabble.com> (raw)
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))Hi all, This is my table...
<http://postgresql.nabble.com/file/n5855509/screenshot.jpg;
This is the SQL statement to create the same table...
* CREATE TABLE tbl_ebscbspa_log05
(
pcnum smallint NOT NULL,
fnserial serial NOT NULL,
fnname character varying NOT NULL,
timestmp timestamp without time zone DEFAULT clock_timestamp(),
timeelapse interval,
timetype character varying,
timeindex real,
CONSTRAINT table_ebscb_spa_log05_pkey PRIMARY KEY (fnserial)
)
WITH (
OIDS=FALSE
);
ALTER TABLE tbl_ebscbspa_log05
OWNER TO postgres;*
How can I SUM all timeelapse WHERE timetype = 'Break' AND that are placed
after(below) the last(descendent) timetype = 'Start'? So in the table above
Ill get both blue square colored rows summed up. So I get 'totalbreak' =
00-00-00 02:00:00.000
How would be the syntax to select all possible 'Breaks' after the
last(descendent) 'Start' and sum them up? (lets say the max possible
'Breaks' are nine).
I have try this, resulting NULL
*SELECT t.timeelapse FROM tbl_ebscbspa_log05 t WHERE t.timetype =
'Break' AND NOT EXISTS (SELECT 1 FROM tbl_ebscbspa_log05 WHERE timetype =
'Start' AND 'timestmp' > 't.timestmp') INTO v_timeelapse_break;
IF FOUND THEN
NEW.timeelapse := v_timeelapse_break;*
Pls I would like to know how to SUM THEM UP, not just SELECT THEM, hope some
good PostgreSQL fellow programmer could give me a hand with it.
Thanks Advanced.
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To: pgsql-admin@postgresql.org
Cc: litumelendez@gmail.com
Subject: Re: SUM all timeelapse WHERE timetype = 'Break' but only the rows that are after(below) timetype = 'Start'
In-Reply-To: <1435470976136-5855509.post@n5.nabble.com>
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