I am developing a task in which I need to know how to compare the
results of two queries ...
I thought about creating a procedure which both queries received by
parameters respectively. Then somehow able to run queries and return if
both have the same result. As a feature of the problem, both queries are
selection.
Here I leave a piece of code I want to do.
create or replace function compare(sql1 character varying, sql2
character varying) returns boolean as
$body$
Declare
Begin
--here in some way to run both queries and then compare
End;
$body$
language 'plpgsql';
I've been studying and I found that there EXECUTE but to use it, first
you should have used PREPARE, and in this case the values of the
parameters are already made inquiries.
For example the execution of the function would be something like ...
select compare('select * from table1', 'select * from table2');
For this case the result is false, then the queries are executed on
different tables.
Thanks in advance.
Best regards from Cuba.
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