select c.`stock_id`,a.`stock_name`,a.`coupon_amount`, a.`transaction_minimum`, b.`company_name`, a.`start_time`, a.`end_time`, (select count(1) from user_coupon where `activity_id` = a.`id`) as `grant`,(select count(1) from user_coupon where `activity_id` = a.`id` and (status = "20" or status = "30")) as `receive`,(select count(1) from user_coupon where `activity_id` = a.`id` and status = "30") as `writeOff` from wx_coupon a left join baishiof_company b on a.company_id = b.company_id left join user_coupon c on a.`id` = c.`activity_id` group by c.`stock_id`

这是一个 SQL 查询语句，用于从多个表中获取优惠券活动的相关信息。查询语句如下：

SELECT
    c.stock_id,
    a.stock_name,
    a.coupon_amount,
    a.transaction_minimum,
    b.company_name,
    a.start_time,
    a.end_time,
    (SELECT COUNT(1) FROM user_coupon WHERE activity_id = a.id) AS grant,
    (SELECT COUNT(1) FROM user_coupon WHERE activity_id = a.id AND (status = "20" OR status = "30")) AS receive,
    (SELECT COUNT(1) FROM user_coupon WHERE activity_id = a.id AND status = "30") AS writeOff
FROM
    wx_coupon a
LEFT JOIN
    baishiof_company b ON a.company_id = b.company_id
LEFT JOIN
    user_coupon c ON a.id = c.activity_id
GROUP BY
    c.stock_id

这个查询语句通过左连接（LEFT JOIN）操作将三个表 wx_coupon、baishiof_company 和 user_coupon 进行关联。通过 GROUP BY 子句对 c.stock_id 进行分组，以获取每个股票的相关信息。同时，使用子查询统计了每个活动的发放数量（grant）、领取数量（receive）和核销数量（writeOff）。

请注意，这只是一个 SQL 查询语句的示例，具体的结果需要根据实际数据和数据库结构来确定。