通过MySQL加入3个表

Question

I am trying to join 3 tables to access data from each table. The main table in this case is going to be the Stats table. So I need to access the Players table to get their NextOpponent and then I need access to the Defense table to run calculations on the NextOpponent. Any ideas have to achieve all 3 of these.

Current SQL Statement: (Currently in an never ending loop of printing out duplicates)

$query="SELECT * FROM Stats
    INNER JOIN Defense ON Stats.Team =  Defense.Team
    INNER JOIN Players ON Defense.Team = Players.team";

Here is my database structure.

Players
-PID (Primary)
-Name
-NextOpponent

Stats
-PID (Primary)
-Name
-Touchdowns
-Receptions
-etc....

Defense
-Team (Unique)
-Points

So my intended output would be:

Chris Johnson
Next Opponent: IND
Defense Points: 100

UPDATE: I can now access the fields, however when I echo the defense points it actually returns the points of the teams defense the player is on not their next opponents defensive points.

Answer 1

Like this:

SELECT * FROM Stats s, Defense d, Players p 
WHERE s.Team = d.Team AND d.Team = p.team;

Answer 2

How about using GROUP BY p.id ?

UPDATE

This was the final query:

SELECT * FROM Stats s JOIN Players p ON p.PID = s.PID JOIN Defense d ON d.Team = p.upcoming GROUP BY p.PID

Answer 3

SQL doesn't return endless data sets. I'd suggest looking at your code to ensure you read the next record inside your loop.