Question

我有一个团队日程表，如下所示：

DBO.SCHEDULE

Game1_Time  |  Game1_Home_Team   | Game1_Away_Team 
===================================================
12:00:00    |         1          |         2

我想将团队价值替换为另一个表中存在的相应团队：

DBO.TEAM

Team_Number  |  Team_Name
========================
    1        |  The Monsters
    2        |  Bug Bites

尝试这样做：如何更换1＆amp; 2，附表＆＃34; The Monsters＆＃34; ＆安培; ＆＃34; Bug Bites＆＃34;在查询结果中？

Game1_Time  |  Home Team         | Away Team 
===================================================
12:00:00    |  The Monsters      |  Bug Bites

Answer 1

基本上只需要两个连接一个用于主页名称，一个连接用于离开名称。

SELECT 
     s.Game1_Time, 
     t.Team_Name as 'Home Team', 
     t1.Team_Name as 'Away Team'
FROM `SCHEDULE` s
JOIN `TEAM` t on t.Team_Number = s.Game1_Home_Team
JOIN `TEAM` t1 on t1.Team_Number = s.Game1_Away_Team

我添加了反引号，因为schedule是一个关键字，所以只是为了不弄乱你应该在tablename上使用backtics

DEMO

SQL在查询结果中替换另一个表中的多个变量

1 个答案: