How to pass a parameter in a query to postgreSQL 12

[Hassan Camacho Cadre]

Hello


I recently installed a postgreSQL v12, in previous version 8.3 in all my
queries I pass parameters using the character :

SELECT

  public.tabla.id

FROM

  public.tabla

WHERE

  public.tabla.id = :a

In the new version when I try to make this query it sends me an error

ERROR syntax error at or near ":"



I tried



?a , ¿a, @a



But I always got an error


I am executing this query on the query editor of pgadmin 4

Could someone help me to know how I can configure the parameter passing
character or, failing that, how I should pass the parameters in this new
version.

Greetings

-- 
Atentamente Msc. Hassan Camacho.