本课内容目前为英文。
The real leaderboard
GROUP BY squeezes rows together, but a leaderboard needs every row and its position. Window functions calculate across a set of rows, the window, while keeping each row in the result.
本课内容目前为英文。
GROUP BY squeezes rows together, but a leaderboard needs every row and its position. Window functions calculate across a set of rows, the window, while keeping each row in the result.