update case when exists的相關文章
update case when exists的相關公司資訊

MySQL syntax for UPDATE + CASE WHEN + EXISTS + SELECT MAX
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日期:2025-06-16
I am not 100% sure this does what you want, but I think it does: UPDATE tasks
SET `Order`= coalesce((SELECT MAX(t.`Order`) + 1 AS `Order` FROM ......看更多