哪位大侠能够一条sql语句执行更新多条记录
id num
1 1
2 2
3 4
4 8
表名test
最终结果
id为1的， 更新为2
id为2的，更新为3
id为3的，更新为6
id为4的，更新为11
------解决方案--------------------
如果不是相同的是无法一起更新的.看看有没其他神奇的写法吧
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