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#region SetInWord SQL中存在IN时候的设置 public static void SetInWord(this OracleCommand cmd, string strParamKey, string[] values) { // 开头的@和：去掉 var strKeyOrignal = strParamKey.Replace(":", string.Empty).Replace("@", string.E

举个例子一目了然 substr('This is a test', 6, 2) would return 'is' substr('This is a test', 6) would return 'is a test' substr('TechOnTheNet', 1, 4) would return 'Tech' substr('TechOnTheNet', -...