SELECT DISTINCT FIRST_VALUE(`id`) OVER `win` AS `id`, `user_id`,
FIRST_VALUE(`score`) OVER `win` AS `score`,
FIRST_VALUE(`user_name`) OVER `win` AS `user_name`
FROM `game_api_score`
WINDOW `win` AS (PARTITION BY `user_id` ORDER BY `score` DESC)
The error (2002) Can't connect to ... normally means that there is no MySQL server running on the system or that you are using an incorrect Unix socket file name or TCP/IP port number when trying to connect to the server. You should also check that the TCP/IP port you are using has not been blocked by a firewall or port blocking service.https://dev.mysql.com/doc/refman/8.0/en/can-not-co...
Определи́тель (детермина́нт) в линейной алгебре — скалярная величина, которая характеризует ориентированное «растяжение» или «сжатие» многомерного евклидова пространства после преобразования матрицей; имеет смысл только для квадратных матриц.