Thread: [GENERAL] Extract from text id other table - PG 9.1

I have the type/string value stored in another table, and from that i would like to get the id.

On Tuesday, June 6, 2017 10:32:16 PM EDT Patrick B wrote:
> Hi guys,
>
> I've got tableA with 3 columns.
>
> id(seriaL) | type(character varying(256)) | string(character varying(256))
>
> I have the type/string value stored in another table, and from that i would
> like to get the id.
>
> Example:
> http://dbfiddle.uk/?rdbms=postgres_9.6&fiddle=15c571caa36876f00a0a2eaace703a
> 2b
>
> How can I extract, from that tablea.type_m column the tableb.id value?

SELECT b.id FROM tableb b, tablea a
  WHERE (b.type || '/' || b.string = a.type_m) AND (a.id = 2);