Re: LEFT OUTER JOIN issue - Mailing list pgsql-sql
| From | Oliveiros |
|---|---|
| Subject | Re: LEFT OUTER JOIN issue |
| Date | |
| Msg-id | 8111AC40AA9840A489285D145B52A2BB@marktestcr.marktest.pt Whole thread Raw |
| In response to | LEFT OUTER JOIN issue (Thomas BOURIMECH <thomas.bourimech@metnext.com>) |
| Responses |
Re: LEFT OUTER JOIN issue [SOLVED]
|
| List | pgsql-sql |
SELECT ct.dat,ct.heur,hp.datmesure,hp.heuremesure,hp.t FROM calendar_temp as ct
LEFT OUTER JOIN h_part as hp
ON (ct.dat = hp.datmesure
AND ct.heur = hp.heuremesure
AND hp.poste_idposte = 275)
ORDER BY ct.dat, ct.heur
And drop the WHERE clause.
See if it gives the results you intended.
Best,
Oliveiros
----- Original Message -----From: OliveirosSent: Wednesday, April 21, 2010 1:53 PMSubject: Re: [SQL] LEFT OUTER JOIN issueHi, Thomas.
I believe it is because of your WHERE clause, which is filtering out the nulls from hp table.
According to
WHERE
hp.poste_idposte = 275
You only want registers that have hp.poste_idposte = 275, not the null ones.
HTH
Best,
Oliveiros
----- Original Message -----From: Thomas BOURIMECHSent: Wednesday, April 21, 2010 1:29 PMSubject: [SQL] LEFT OUTER JOIN issueHi everyone, here is my problem :
I got two tables :
CREATE TABLE "public"."calendar_temp" (
"id" SERIAL,
"dat" DATE,
"heur" TIME WITHOUT TIME ZONE,
CONSTRAINT "calendar_temp_pkey" PRIMARY KEY("id")
) WITHOUT OIDS;
CREATE TABLE "public"."h_part" (
"idh" SERIAL,
"poste_idposte" INTEGER NOT NULL,
"t" NUMERIC(4,1),
"heuremesure" TIME WITHOUT TIME ZONE,
"datmesure" DATE,
CONSTRAINT "h_part_datmesure_key" UNIQUE("datmesure", "heuremesure", "poste_idposte"),
CONSTRAINT "h_part_pkey" PRIMARY KEY("idh"),
CONSTRAINT "h_part_fk" FOREIGN KEY ("poste_idposte")
REFERENCES "public"."poste"("idposte")
ON DELETE NO ACTION
ON UPDATE NO ACTION
NOT DEFERRABLE
) WITHOUT OIDS;
Data in table are like this :
calendar_temp
-----------------
id dat heur
1 15/03/2008 0:00
2 15/03/2008 3:00
3 15/03/2008 6:00
4 15/03/2008 9:00
5 15/03/2008 12:00
6 15/03/2008 15:00
h_part
-----------------
idh poste_idposte t heuremesure datmesure
5001 275 8,3 0:00 15/03/2008
5002 275 12 3:00 15/03/2008
5003 275 15 6:00 15/03/2008
5004 275 18 9:00 15/03/2008
I expect the following data set as a result from the following request :
SELECT ct.dat,ct.heur,hp.datmesure,hp.heuremesure,hp.t FROM calendar_temp as ct
LEFT OUTER JOIN h_part as hp
ON ct.dat = hp.datmesure
AND ct.heur = hp.heuremesure
WHERE
hp.poste_idposte = 275
ORDER BY ct.dat, ct.heur
dat heur datmesure heuremesure t
-----------------------------------------------------------
15/03/2008 0:00 15/03/2008 0:00 8,3
15/03/2008 3:00 15/03/2008 3:00 12
15/03/2008 6:00 15/03/2008 6:00 15
15/03/2008 9:00 15/03/2008 9:00 18
15/03/2008 12:00 null null null
15/03/2008 15:00 null null null
But unfortunatly all that I get is this set :
dat heur datmesure heuremesure t
-----------------------------------------------------------
15/03/2008 0:00 15/03/2008 0:00 8,3
15/03/2008 3:00 15/03/2008 3:00 12
15/03/2008 6:00 15/03/2008 6:00 15
15/03/2008 9:00 15/03/2008 9:00 18
Getting mad with it...
Thanks for any help...