Question

I need to manage some data and retrieve a result I’m not able to do.

Table1
id int
idcat int (related to the table2)
tt varchar
dt datetime

Table2
idcat int
days int

what I need is to retrieve ALL table1 record that are not older than days related to each category (idcat).

Thanks,
A.

Answer 1

SELECT * from Table1 a join Table2 b on a.idcat = b.idcat where DATEDIFF(NOW(), dt)<=b.days

should give you all records that are not older than days in each category