SQL，如何在SQL中連接兩個具有名稱的ID

Question

我有兩個表。

第一表 「玩家」 載：

Player_id; 
Name; 
Surname; 

第二個表 「替換」 載：

Sub_id; 
In_player_id; 
Out_player_id; 

，現在我想打印的in_player_id姓名和sql使用select的out_player_id語言

Answer 1

這可以使用兩個JOIN s：

SELECT INPLAYER.Name, INPLAYER.Surname, OUTPLAYER.Name, OUTPLAYER.Surname 
FROM Substitutions 
INNER JOIN Player AS INPLAYER ON (Substitutions.In_player_id = INPLAYER.Player_id) 
INNER JOIN Player AS OUTPLAYER ON (Substitutions.Out_player_id = OUTPLAYER.Player_id) 

對於Oracle數據庫，刪除「AS」關鍵字。