![](/img/trans.png)
[英]MySQL group_concat returning all values instead of values per column
[英]mysql GROUP CONCAT not returning values
这是我的查询
SELECT
SUM(o.order_disc + o.order_disc_vat) AS manualsale
FROM
orders o
WHERE
o.order_flag IN (0 , 2, 3)
AND o.order_status = '1'
AND (o.assign_sale_id IN (SELECT GROUP_CONCAT(CAST(id AS SIGNED)) AS ids FROM users WHERE team_id = 92))
AND DATE(o.payment_on) = DATE(NOW())
当我在终端运行此查询时,上述查询返回 null
当我在下面使用子查询时,它会返回数据
SELECT GROUP_CONCAT(CAST(id AS SIGNED)) AS ids FROM users WHERE team_id = 92)
上面的查询返回
'106,124,142,179'
当我运行我的第一个查询时,如下所示
SELECT
SUM(o.order_disc + o.order_disc_vat) AS manualsale
FROM
orders o
WHERE
o.order_flag IN (0 , 2, 3)
AND o.order_status = '1'
AND (o.assign_sale_id IN (106,124,142,179))
AND DATE(o.payment_on) = DATE(NOW())
它返回我的价值。 为什么它不适用于子查询请帮助
这不符合您的要求:
AND (o.assign_sale_id IN (SELECT GROUP_CONCAT(CAST(id AS SIGNED)) AS ids FROM users WHERE team_id = 92))
这会将单个值与逗号分隔的值列表进行比较,因此它永远不会匹配(除非给定团队的用户中只有一行)。
您可以将其表述为:
AND assign_sale_id IN (SELECT id FROM users WHERE team_id = 92)
但这可能会更有效地表达为exists
:
AND EXISTS(SELECT 1 FROM users u WHERE u.team_id = 92 AND u.id = o.assign_sale_id)
旁注:我还建议重写此条件:
AND DATE(o.payment_on) = DATE(NOW())
以下,可以利用索引:
AND o.payment_on >= current_date AND o.payment_on < current_date + interval 1 day
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.