SELECT
M.ModelID, M.Model, C.Content
FROM
Models M
LEFT JOIN
Models_Content C
ON C.ContentID = (SELECT MIN(ContentID) FROM Models_Content WHERE ModelID = M.ModelID)
WHERE
M.ModelID = 5
Eller
;WITH sorted_content AS
(
SELECT
ROW_NUMBER() OVER (PARTITION BY ModelID ORDER BY ContentID) AS itemID,
*
FROM
Models_Content
)
SELECT
M.ModelID, M.Model, C.Content
FROM
Models M
LEFT JOIN
sorted_content C
ON C.ModelID = M.ModelID
AND C.itemID = 1
WHERE
M.ModelID = 5