Question

If I have table:

+------------------------------------------------------------+
|  Col 1                                     Col 2    Col 3  |
+------------------------------------------------------------+
|  a72195fa-57ca-4849-b423-5595219c8f6b      Val1     1      |
|  a72195fa-57ca-4849-b423-5595219c8f6b      Val2     1      |
|  a72195fa-57ca-4849-b423-5595219c8f6b      Val3     2      |
|  a72195fa-57ca-4849-b423-5595219c8f6b      Val4     3      |
|  2F6D0B9E-2221-4D18-A64E-ACCFB83EACC7      Val5     2      |
|  2F6D0B9E-2221-4D18-A64E-ACCFB83EACC7      Val6     2      |
|  2F6D0B9E-2221-4D18-A64E-ACCFB83EACC7      Val7     3      |
+------------------------------------------------------------+

For a given Col 1 Value, how do I return all records for smallest value in Col3. Meaning where [Col 1] = a72195fa-57ca-4849-b423-5595219c8f6b, I want to return:

+------------------------------------------------------------+
|  Col 1                                     Col 2    Col 3  |
+------------------------------------------------------------+
|  a72195fa-57ca-4849-b423-5595219c8f6b      Val1     1      |
|  a72195fa-57ca-4849-b423-5595219c8f6b      Val2     1      |
+------------------------------------------------------------+

And where [Col 1] = 2F6D0B9E-2221-4D18-A64E-ACCFB83EACC7, I want to return:

+---------------------------------------------------------+
| Col 1                                   Col 2    Col 3  |
+---------------------------------------------------------+
| 2F6D0B9E-2221-4D18-A64E-ACCFB83EACC7    Val5     2      |
| 2F6D0B9E-2221-4D18-A64E-ACCFB83EACC7    Val6     2      |
+---------------------------------------------------------+

Answer 1

SELECT A.*
FROM TABLE A,
(
SELECT Col1,MIN(Col3) AS Col3
FROM TABLE
GROUP BY Col1
) B
WHERE A.Col3=B.Col3;