Define variable in script

Hello i have in the same panel query a lot

select x,y from tabA where col1=:param1
UNION
select t,u from tabB where col5=:param1 and col6=:param2

… This works pop upping the variable request panel. sometimes i have to redo the query a lot of time changing only param1 value so i like the possibility to write at the begin of my query something like

def :param1='XXX'
def :param2='YYY'

select x,y from tabA where col1=:param1
UNION
select t,u from tabB where col5=:param1 and col6=:param2

This is useful also if I have to do this on multipl DB so i can copy paste the code in a separate tab change only the value and do the query on another DB.

this syntax can be useful also to remember the last value i used.

[serge-rider]

You already can do this with command set: @set paramName=paramValue Like this:

@set param1='XXX'
@set param2='YYY'

select x,y from tabA where col1=:param1
UNION
select t,u from tabB where col5=:param1 and col6=:param2

Is this what you need?

[ClodoaldoPinto]

@damaresende

That is great! What if I want to get the value from a query? Is that possible? I am trying the following but I get an error (ORA-00936: missing expression).

@set cust_doc = 123456789 @set customer = SELECT customer_id FROM customers WHERE customer_document_no = :cust_doc

SELECT subscription_id FROM subscriptions WHERE customer_id = :customer -- many other queries using variable customer

In this case it is simpler and more performant to build the adequate query:

@set cust_doc = 123456789
select subscription_id
from
    subscriptions s
    inner join
    customers c on c.customer_id = s.customer_id
where customer_document_nu = cust_doc