根据条件/值从Mysql表中获取前3名

问题描述

根据足球运动员的位置，我需要获得前3名前锋，前3名中场球员，前4名后卫球员

I need to get top 3 Forwards,Top 3 Midfielders,Top 4 Defenders based on Soccer players Position

我有一个单独的表

位置表的结构

PositionID和PositionName

PositionID And PositionName

1 Tor(意味着守门员)

1 Tor(Which Means Goal Keeper)

2 Abwehr(指防御者)

2 Abwehr(Which Means Defenders)

3米特尔费尔德(意味着中场)

3 Mittelfeld(Which Means Midfielders)

4格里夫(指向前移动)

4 Angriff(Which Means Forwards)

我有Soccerplayers Table，其中有Name(玩家名称)，PositionId，TScore(玩家得分)

and i have Soccerplayers Table where there is Name(Player Name),PositionId,TScore(Player Score)

我需要基于TScore的每个位置的前3名玩家

i need Top 3 players from Each position based on TScore

任何查询建议??

推荐答案

那么您可以尝试以下查询集:

Well you can try this query set:

(SELECT Name, PositionId, TScore FROM Soccerplayers WHERE PositionID = 1 ORDER BY TScore LIMIT 3)
UNION
(SELECT Name, PositionId, TScore FROM Soccerplayers WHERE PositionID = 2 ORDER BY TScore LIMIT 4)
UNION
(SELECT Name, PositionId, TScore FROM Soccerplayers WHERE PositionID = 3 ORDER BY TScore LIMIT 3)

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