Mysql 计数返回双精度值

我们有一个小型拍卖系统，我添加了一个选项，可以为param的项目名称及其值编写一些可选参数。问题是当有一些参数COUNT*作为bids\u COUNT返回双倍值时。问题出在拍卖参数或组CONCAT函数中，但我就是搞不清楚

SELECT a.*, u.user_nick, u.rating_positive, u.rating_negative, u.money_back, u.user_city, u.user_zip, u.user_country
    ,GROUP_CONCAT(DISTINCT ap.param_name SEPARATOR '$concatSeparator') AS param_names
    ,GROUP_CONCAT(DISTINCT ap.param_value SEPARATOR '$concatSeparator') AS param_values
    ,COUNT(*) AS bids_count, MAX(b.bid) AS last_bid
    ,(SELECT i.increment
        FROM increments i
        WHERE i.min_price <= IFNULL(MAX(b.bid), 0) AND i.currency = a.currency
        ORDER BY i.min_price DESC
        LIMIT 1)
        AS min_bid
    ,(SELECT u.user_nick
        FROM users u
        WHERE u.user_id = (SELECT user_id FROM bids WHERE auction_id = a.auction_id AND bid = MAX(b.bid))
        LIMIT 1)
        AS last_bid_user_nick
FROM auctions a
LEFT JOIN users u ON u.user_id = a.user_id
LEFT JOIN auctions_params ap ON ap.auction_id = a.auction_id
LEFT JOIN bids b ON b.auction_id = a.auction_id
WHERE a.auction_id = $auctionID
LIMIT 1

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谢谢你的帮助，英语很抱歉

试试看b.ID我怎么会错过呢？非常感谢，你说得对。