Question

我现在正试图用我的'summary'表中的数据填充我的'testMatch'表（下面）：

TESTMATCH TABLE


+------------------+--------------+------+-----+---------+-------+
| Field            | Type         | Null | Key | Default | Extra |
+------------------+--------------+------+-----+---------+-------+
| match_id         | int(11)      | NO   | PRI | NULL    |       | 
| match_date       | date         | YES  |     | NULL    |       | 
| ground           | varchar(50)  | YES  | MUL | NULL    |       | 
| homeTeam         | varchar(100) | YES  | MUL | NULL    |       | 
| awayTeam         | varchar(100) | YES  | MUL | NULL    |       | 
| matchResult      | varchar(100) | YES  | MUL | NULL    |       | 
| manOfMatch       | varchar(30)  | YES  |     | NULL    |       | 
| homeTeam_captain | int(10)      | YES  | MUL | NULL    |       | 
| homeTeam_keeper  | int(10)      | YES  | MUL | NULL    |       | 
| awayTeam_captain | int(10)      | YES  | MUL | NULL    |       | 
| awayTeam_keeper  | int(10)      | YES  | MUL | NULL    |       | 
+------------------+--------------+------+-----+---------+-------+

填充match_id没有问题-----＆gt; manOfMatch - 它是'homeTeam_captain'，'homeTeam_keeper'，'awayTeam_captain'和'awayTeam_keeper'，我遇到了问题。

概要表


mysql> DESCRIBE SUMMARY;
+-----------------+--------------+------+-----+---------+-------+
| Field           | Type         | Null | Key | Default | Extra |
+-----------------+--------------+------+-----+---------+-------+
| matchID         | int(11)      | NO   | PRI | NULL    |       | 
| Test            | int(11)      | YES  |     | NULL    |       | 
| matchDate       | date         | YES  |     | NULL    |       | 
| Ground          | varchar(50)  | YES  |     | NULL    |       | 
| HomeTeam        | varchar(100) | YES  |     | NULL    |       | 
| AwayTeam        | varchar(100) | YES  |     | NULL    |       | 
| matchResult     | varchar(50)  | YES  |     | NULL    |       | 
| MarginRuns      | int(11)      | YES  |     | NULL    |       | 
| MarginWickets   | int(11)      | YES  |     | NULL    |       | 
| ManOfMatch      | varchar(40)  | YES  |     | NULL    |       | 
| HomeTeamCaptain | varchar(30)  | YES  |     | NULL    |       | 
| HomeTeamKeeper  | varchar(30)  | YES  |     | NULL    |       | 
| AwayTeamCaptain | varchar(30)  | YES  |     | NULL    |       | 
| AwayTeamKeeper  | varchar(30)  | YES  |     | NULL    |       | 
+-----------------+--------------+------+-----+---------+-------+

我需要以某种方式从摘要中选择数据，获取相应的player_id并将player_id输入到我的'testMatch'中。玩家表格如下：

球员表


mysql> describe players;
+----------------+--------------+------+-----+---------+----------------+
| Field          | Type         | Null | Key | Default | Extra          |
+----------------+--------------+------+-----+---------+----------------+
| player_id      | int(11)      | NO   | PRI | NULL    | auto_increment | 
| player_surname | varchar(30)  | YES  |     | NULL    |                | 
| team           | varchar(100) | YES  | MUL | NULL    |                | 
+----------------+--------------+------+-----+---------+----------------+

所以要澄清一下，例如。我想选择homeTeam_captain数据FROM摘要表但不是名字，我想要相应的player_id。

我假设我需要使用某种连接/子查询来完成这个...我已经尝试首先找到正确的选择查询以确保我拔出正确的数据，并且我一直在使用下面的测试代码（感谢用户Larry_Croft帮助我）：


select matchID, player_id, player_surname, team from players p, summary s
where
s.hometeamcaptain = p.player_surname AND s.HomeTeam = p.team ORDER BY matchID;

但是这正确地带回了65行（65场比赛）但是我接着尝试了：


select matchID, player_id, player_surname, team from players p, summary s
where
s.hometeamKEEPER = p.player_surname AND s.HomeTeam = p.team ORDER BY matchID;

但是这只能带回61行（应该是65行）所以我必须在逻辑中出错。

一旦我选择了这个工作，我就需要以某种方式将它包含在我的'INSERT INTO ..... SELECT语句中，将所有数据放入'testMatch'表。

我希望这是有道理的，谢谢你的帮助！

Answer 1

对我来说，看起来有一个家庭计划，它有一个空值或者hometeamKEEPER的值不在玩家表中。

使用以下查询，您应该能够找到不在播放器表中的hometownKEEPER：

SELECT matchID, player_id, player_surname, team 
FROM players p 
     RIGHT JOIN summary s ON p.hometeamKEEPER = p.player_surname AND 
                             s.HomeTeam = p.team
ORDER BY matchID;

mysql问题：从另一个表填充表但引用ID而不是名称

1 个答案: