find minimum of one variable and matching values of other variables in SQL

Question

I create a test data set using the following commands in MySQL:

CREATE TABLE test
   (v1 INT,
   v2 INT,
   v3 INT);

INSERT INTO test (v1,v2,v3) VALUES(1,3,300);
INSERT INTO test (v1,v2,v3) VALUES(1,2,200);
INSERT INTO test (v1,v2,v3) VALUES(1,1,100);
INSERT INTO test (v1,v2,v3) VALUES(2,9,900);
INSERT INTO test (v1,v2,v3) VALUES(2,7,700);
INSERT INTO test (v1,v2,v3) VALUES(2,5,500);

I want to find the minimum of v2 while grouping by v1 and to display the value for v3 matching the minimum of v2. In other words:

v1 v2 v3
1  1  100
2  5  500

When I run the following:

SELECT v1,MIN(v2),v3 FROM test
    GROUP BY v1;

I get:

v1 v2 v3
1  1  300
2  5  900

How do I get the desired output?

Answer 1

A sub query should work fine in this case. You can try something like below:

Select v1, v2, v3 from test a
where (select min(v2)
from test b
where a.v1 = b.v1) = v2;