我的PSQL查看錶有什麼問題？

Question

我有兩個表的球員和比賽：

CREATE TABLE player(
id serial PRIMARY KEY NOT NULL, 
name varchar(255) NOT NULL 
); 

CREATE TABLE match(
id serial PRIMARY KEY, 
winner serial REFERENCES player(id) NOT NULL, 
loser serial REFERENCES player(id) NOT NULL CHECK (loser != winner) 
); 

CREATE SEQUENCE playerid_sequence 
start 1 
increment 1; 

CREATE SEQUENCE matchid_sequence 
start 1 
increment 1; 

我希望創建一個連接兩個表的視圖表：

CREATE VIEW matchplayers AS 
SELECT winner.name, loser.name, m.id 
from player winner, player loser, match m 
WHERE m.winner = winner.id AND m.loser = loser.id; 

但它返回的是「名」已經提到了錯誤不止一次。相當缺乏經驗，SQL

Answer 1

嘗試

CREATE VIEW matchplayers AS 
SELECT winner.name as winner_name, loser.name as loser_name, m.id 
from player winner, player loser, match m 
WHERE m.winner = winner.id AND m.loser = loser.id; 

得到的觀點的明確列名。