Question

What I am wanting to do is if there is an entry in “player_shops” for the account ID then have a specific where clause, otherwise have no where clause. If that makes sense. Here is my code:

SELECT *,
       SUM(acc.gold_coins + shop.gold_coins) AS total_gold
  FROM accounts AS acc
     , player_shops AS shop
 WHERE acc.acc_id = shop.acc_id
 GROUP BY acc.acc_id
 ORDER BY total_gold DESC
 LIMIT 100

I want that WHERE clause to only be there IF the is a player_shop entry for the specified account ID.

Any help?

Answer 1

You better use JOIN.

SELECT *,
   SUM(acc.gold_coins + IF(shop.gold_coins IS NULL, 0, shop.gold_coins)) AS total_gold
FROM accounts AS acc
LEFT JOIN player_shops AS shop
ON acc.acc_id = shop.acc_id
GROUP BY acc.acc_id
ORDER BY total_gold DESC
LIMIT 100

I’m not sure about IF syntax. It depends on what db you use.