Informix: Query merge - sql

Question

i have 2 queries:
select COUNT(o.id_offer) from offers o, product p where
p.id_product = "+ productID +" and o.id_offer = "+ offerID +" and (b.type = 0 or o.type = "A")
this query returns the count of some product
select p.id_product, p.name, s.id_supplier, s.name from product p, suppliers s where p.id_supplier = s.id_supplier
this query returns all products data
i want to combine the two queries in one, something like this:
select (select COUNT(o.id_offer) from offers o, product p where
p.id_product = p.id_product and o.id_offer = 13345 and (b.type = 0 or o.type = "A")) count,p.id_product, p.name, s.id_supplier, s.name from product p, suppliers s where p.id_supplier = s.id_supplier
Anyone knows how to do this in informix?

Answer 1

Please use the explicit join notation, not the comma-list of table names in the FROM clause notation.
The first query needs generalizing to generate a product ID and the matching count.
SELECT p.id_product, COUNT(o.id_offer) AS offer_count
FROM offers o
JOIN product p ON p.id_product = o.id_product -- Guessed column
WHERE (p.type = 0 OR o.type = 'A')
GROUP BY p.id_product
The second query can be converted to:
SELECT p.id_product, p.name, s.id_supplier, s.name
FROM product p
JOIN suppliers s ON p.id_supplier = s.id_supplier
These two queries can be combined with a join, too:
SELECT x.id_product, x.product_name, x.id_supplier, x.supplier_name, y.offer_count
FROM (SELECT p.id_product, p.name, s.id_supplier, s.name
FROM product p
JOIN suppliers s ON p.id_supplier = s.id_supplier
) AS x
JOIN (SELECT p.id_product, COUNT(o.id_offer) AS offer_count
FROM offers o
JOIN product p ON p.id_product = o.id_product -- Guessed column
WHERE (p.type = 0 OR o.type = 'A')
GROUP BY p.id_product
) AS y
ON x.id_product = y.id_product