ExcuteScalar ExecuteNonQuery - 润新知

ExcuteScalar ExecuteNonQuery

ExecuteNonQuery()是update,delete ,insert影响行数，对于select永远返回-1

ExcuteScalar() select 未找到返回0；
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原文地址：https://www.cnblogs.com/yuluhuang/p/3312945.html

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