Take first row after group in SQL Server [closed] - sql

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Does anyone know how to take always the first row after group by in SQL Server? Look on the screenshot for better explanation:
Result after select:
+------+---------+------+
| NAME | CAR | AGE |
+------+---------+------+
| Alex | BMW | 5 |
+------+---------+------+
| Alex | Audi | 2 |
+------+---------+------+
| Tom | VW | 10 |
+------+---------+------+
| Tom | Renault | 4 |
+------+---------+------+
| Tom | Peugeot | 2 |
+------+---------+------+
Expected result after group by:
+------+-----+
| NAME | CAR |
+------+-----+
| Alex | BMW |
+------+-----+
| Tom | VW |
+------+-----+

Answer 1

You can try to use the ROW_NUMBER() window function with PARTITION_BY clause. This function assigns a sequential integer to each row within the partition of a result set. The row number starts with 1 for the first row in each partition.
After that, you can use the where clause to select rows that have row numbers as 1.
You can follow this article for a better understanding.
Below is just an example (As I don't know how your query works):
select *
from
(
SELECT
ROW_NUMBER() OVER (PARTITION BY name ORDER BY name) row_num,
*
from(
-- your main group by query
)
)
where row_num=1

Answer 2

you should be able to get the top 1 record for each person using the below query, let me know if this works for you.
SELECT * FROM car_owners GROUP BY person_name;
let me know if you want to order the records in alphabetical order ASC or DESC and then GROUP BY them
Thank You
enter image description here