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怎么判断要插入的数据是否已经存在，如果存在就count+1，不存在就插入

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Release： 2016-06-20 12:25:41
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插入前先判断数据是否存在，如果存在就COUNT+1，不存在就插入数据怎么写
                


回复讨论(解决方案)

开启事务
select
判断是否存在
如果存在update count+1
如果不存在insert
如果成功 commit
如果失败，rollback

可以给出详细代码么？ 楼主小白一个，有点头晕

如果只是查询表中的一条记录的还要用事物么？

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怎么判断要插入的数据是否已经存在，如果存在就count+1，不存在就插入
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