[英]Add limit in group_concat
我的mysql查询像:
SELECT GROUP_CONCAT(scorecard_id ORDER BY scorecard_id DESC) as scorecard_id
FROM scorecard
WHERE partner_id = 121 AND client_id = 15
它向我返回如下数据:
65,64,63,62,61,60,39,38,37,36,35,34,33,32,31,30,29...
我想在group_concat中添加限制,以便它返回前两个值,即:
65,64
也许用子查询将其括起来:
SELECT
GROUP_CONCAT(t.scorecard_id) AS scorecardId
FROM
(
SELECT
scorecard_id
FROM scorecard
WHERE
partner_id = 121
AND client_id = 15
ORDER BY scorecard_id DESC
LIMIT 2
) AS t;
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