MySQL加入+「WHERE something = MAX（something）」

Question

我有幾個需要加入的表。該表是：

球員

• FIRST_NAME
• 姓氏
• 性別
• LOCATION_ID
• （額外無關列）

個

和

score_entries

• 得分
• 日期時間
• player_id
• （額外無關列）

我要加入他們基於player_id，只想選擇players.location_id最大的記錄。因此，像這樣：

SELECT 
players.first_name, 
players.last_name, 
players.gender, 
score_entries.score, 
score_entries.datetime as jump_date 
players.location_id, 
FROM score_entries 
LEFT JOIN players 
ON score_entries.player_id = players.id 
WHERE gender="m" 
AND location_id="***(ONLY THE HIGHEST LOCATION_ID VALUE IN THE TABLE)***" 

Answer 1

請嘗試以下查詢

SELECT 
    players.first_name, 
    players.last_name, 
    players.gender, 
    score_entries.score, 
    score_entries.datetime as jump_date, 
    players.location_id 
FROM score_entries 
LEFT JOIN players 
ON score_entries.player_id = players.id 
WHERE gender="m" 
AND players.location_id = (SELECT MAX(location_id) from players)