How to test my ad-hoc SQL with parameters in Postgres query window

Question

In Microsoft SQL Server, to test something like this in the query window:

select * from Users where LastName = @lastname

I can add this bef

Answer 1

Perhaps using the DO instruction to simulate a function. In that way you can declare variables and use them to execute your query!

http://www.postgresql.org/docs/9.4/static/sql-do.html