Hello,

I "have" this two tables:


Table Cat:
id|A|B
--+-+-
1|3|5
2|5|8
3|6|9

Table Pr:
id|Catid|
--+-
1|3
2|2
3|1


I need replace "Catid" column for corresponding values A and B (Table Cat) in Table Pr.

Virtual table like this:
Table Pr:
id|Catid|A|B
--+-+-+
1|3|6|9
2|2|5|8
3|1|3|5


Something like this, but that works,...

SELECT * FROM pr WHERE pr.a /*> 1 AND*/*//* <https://www.google.es/search?hl=es&sa=X&ei=ULbyT9uKGYSt0QWNy4CwCQ&ved=0CEUQvwUoAQ&q=between&spell=1> pr.b < 10;

With subqueries is too slow:
SELECT * FROM "Pr" AS p, (SELECT "id" AS cid FROM "Cat" WHERE "lft" > 1 AND "rgt" < 10) AS c WHERE p."Cat"=c."cid" AND (...)) ORDER BY "Catid" ASC OFFSET 0 LIMIT 40


Any suggestion?

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