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I want to rewrite the following query by assigning a “variable name” to the nested query.
select lastname
from table2
where firstname = (select name from table1 where val="whatever")
I want the query to look something like this:
( select name
from table1
where val = "whatever") as retrieved_name;
select lastname
from table2
where firstname = retrieved_name
Is it possible in pure SQL?
No.
You don’t have variables with “pure SQL”. You can have variables with Oralce-PL\SQL and etc’.