[sql]
DECLARE @tblTempStorage TABLE (
[ID] INT IDENTITY(1, 1),
Result FLOAT)

INSERT INTO @tblTempStorage (Result)
SELECT DISTINCT
DEPTH_TO
FROM
GB_SAMPLE
ORDER BY
DEPTH_TO

SELECT
*
FROM
GB_SAMPLE
WHERE
DEPTH_TO = (
SELECT
Result
FROM
@tblTempStorage
WHERE
([ID] = 3))
[/sql]