Question

I have 2 tables. Both the tables contain 2 columns: id, amt.
Table 1 has these data:

id, amt
1,  500;
2,  2000;
4,  1000.

Table 2 contains:

id, amt
1,  100;
1,  100;
1,  100;
1,  100;
1,  100;
2,  250;
3,  300;
4,  1000;

Now my requirement is getting the record which is common id and common amt in both the table. But the challenge here is, id 1 is available in both the table. But the sum(amt) in table 2 with id 1 = amt in table 1 with id 1. I need to pull this record also as a common record. Please help me in this. Thanks.

Answer 1

Something like:

SELECT *
FROM table1 
JOIN (SELECT id, SUM(amt) as amt FROM table2 GROUP BY id) t2
ON t1.id = t2.id AND t1.amt=t2.amt