how to perform select from multiple tables by several ids - php

Question

i have 3 tables that looks like this:
game_table
+---------+------------+------------+----------------------+----------+
| game_id | game_title | sponser_id | game expiration date | prize_id |
+---------+------------+------------+----------------------+----------+
prize_table
+----------+---------------------------+------------+-------------+--------------------+--------------------------------------------+
| prize_id | prize_image_name | prize_cost | prize_title | remaining_quantity | prize_description |
+----------+---------------------------+------------+-------------+--------------------+--------------------------------------------+
sponser_table
+------------+--------------+
| sponser_id | sponser_name |
+------------+--------------+
how do i build query that select all data from the 3 tables that
meat the statement that go's something like pseudo code:
select all data from game_table and prize_table and sponser_table where game_table.sponser_id = 2 and game_table.prize_id = 2
i tried something like this :
SELECT game_list.*, prize_list.* ,sponser_list.* FROM game_list, prize_list,sponser_list
WHERE game_list.sponser_id=2 And game_list.prize_id = 2 And game_list.game_id=2 ;
but it gave me no good results .

Answer 1

You had a WHERE clause to limit to the correct ids, but you had no join conditions to relate your tables. Instead of the implicit join syntax you attempted (comma-separated table list), use a explicit JOINs with stated relating columns:
SELECT
game_list.*,
prize_list.* ,
sponser_list.*
FROM
game_list
JOIN prize_list ON game_list.prize_id = prize_list.prize_id
JOIN sponser_list ON game_list.sponser_id = sponser_list.sponser_id
WHERE game_list.sponser_id=2 And game_list.prize_id = 2 And game_list.game_id=2 ;
I would recommend against selecting all columns from each table though, since you are duplicating the id columns in at least two places. Instead, be explicit about the columns you want. This will also help you if you later add additional columns to these tables that should not be included in this query.
SELECT
game_id,
game_title,
game_list.sponser_id,
game_expiration_date,
game_list.prize_id,
prize_image_name,
prize_cost,
prize_title,
remaining_quantity,
prize_description,
sponser_name
FROM
game_list
JOIN prize_list ON game_list.prize_id = prize_list.prize_id
JOIN sponser_list ON game_list.sponser_id = sponser_list.sponser_id
WHERE game_list.sponser_id=2 And game_list.prize_id = 2 And game_list.game_id=2 ;

Answer 2

SELECT *
FROM game_table
JOIN prize_table USING (prize_id)
JOIN sponser_table USING (sponser_id)
WHERE sponser_id = 2
AND prize_id = 2
AND game_id = 2

Answer 3

SELECT
game_list.*, prize_list.* ,sponser_list.*
FROM game_list
JOIN prize_list ON game_list.prize_id = prize_list.prize_id
JOIN sponser_list ON game_list.sponser_id = sponser_list.sponser_id
WHERE
game_list.sponser_id=2 And game_list.prize_id = 2 And game_list.game_id=2 ;

Answer 4

From your description it appears that the tables may be related. If they are, you need to use a join, like this:
SELECT *
FROM game_table g
LEFT OUTER JOIN prize_table p ON p.prize_id=g.prize_id
LEFT OUTER JOIN sponser_table s ON s.sponser_id=g.sponser_id
WHERE g.game_id=2