Re: Query help

> On Oct 4, 2016, at 9:31 PM, Bret Stern <bret_stern(at)machinemanagement(dot)com> wrote:
>
> Good evening,
> I'm curious about a way to ask the following question of my vendors
> table.
>
> psuedo1 "select all vendors which exist in BUR and EBC and SNJ"
>
> and
> psuedo2 "select all vendors which DO NOT exist in all three show rooms
>
>
> The data is from a Sage accounting system which I pull out and place in a
> pg db. What we are trying to do is identify which vendors are defined in
> all three of our showrooms, and vice-versa, which ones are not.
>
> ap_vendors table
> company_code character varying(10) NOT NULL,
> ap_division_no character varying(2) NOT NULL,
> vendor_no character varying(7) NOT NULL,
> terms_code character varying(2),
> vendor_name character varying(30),
> address_line1 character varying(30),
> address_line2 character varying(30),
> address_line3 character varying(30),
> city character varying(20),
> state character varying(2),
> zip_code character varying(10),
> telephone_no character varying(17),
> fax_no character varying(17),
> CONSTRAINT ap_vendors_pk PRIMARY KEY (company_code, ap_division_no, vendor_no)
>
> sample records:
> "BUR";"00";"ADEXU";"30";"ADEX USA";"''";"''";"''";"''";"''";"92831";"''";"''"
> "BUR";"00";"AGORA";"30";"Agora Natural Surfaces";"''";"''";"''";"''";"''";"90248";"''";"''"
> "BUR";"00";"AKDOP";"30";"AKDO Pacific";"''";"''";"''";"''";"''";"94545";"''";"''"
> "EBC";"00";"ADEXU";"30";"ADEX USA";"''";"''";"''";"''";"''";"92831";"''";"''"
> "EBC";"00";"AGORA";"30";"Agora Natural Surfaces";"''";"''";"''";"''";"''";"90248";"''";"''"
> "EBC";"00";"ARIZ01";"30";"Arizona Tile";"''";"''";"''";"''";"''";"94550";"''";"''"
> "SNJ";"00";"AKDOP";"30";"AKDO Pacific";"''";"''";"''";"''";"''";"94545";"''";"''"
> "SNJ";"00";"AGORA";"30";"Agora Natural Surfaces";"''";"''";"''";"''";"''";"90248";"''";"''"
> "SNJ";"00";"ADEXU";"30";"ADEX USA";"''";"''";"''";"''";"''";"92831";"''";"''"
>
> What I need is a query which I can modify to return only vendors which exists
> in all three company_code columns ( BUR, EBC, SNJ) (they represent showroom location)
>
> eg; exists in BUR, EBC, SNJ
> ADEXU
> AGORA
>
> OR
>
> modify the query to return only the vendors which DO NOT exist in all
> three showrooms based on the first column company_code
>
> eg;
> AKDOP only exists in BUR and SNJ
> ARIZ01 only exists in EBC
>
> Thanks
> Bret
>
>
Not sure I like the schema but
select vendor_no, count(*) from ap_vendors having count(*) = 3;

and maybe count(*) < 3 is your second answer.