① ORA-00936 缺失表达式
实例--错误的情况
1 /// <summary> 2 /// 获取城市信息结果集 3 /// </summary> 4 /// <returns></returns> 5 public DataSet GetCityDS(CityModel cityModel) 6 { 7 string sql = @"select t1.CITY_ID, 8 t1.CITY_NAME, 9 t1.PRO_ID,(select t2.PRO_NAME from T_BASE_PROVINCE t2 where t2.PRO_ID = t1.PRO_ID) PRO_NAME 10 from T_BASE_CITY t1 11 where 1 = 1 12 "; 13 if ((!"".Equals(cityModel.CITY_ID)) && (cityModel.CITY_ID != null)) 14 { 15 sql += " and t1.CITY_ID like '%" + cityModel.CITY_ID + "%'"; 16 } 17 if ((!"".Equals(cityModel.CITY_ID_NEW)) && (cityModel.CITY_ID_NEW != null)) 18 { 19 sql += " and t1.CITY_ID like '%" + cityModel.CITY_ID_NEW + "%'"; 20 } 21 if ((!"".Equals(cityModel.CITY_NAME)) && (cityModel.CITY_NAME != null)) 22 { 23 sql += " and t1.CITY_NAME like '%" + cityModel.CITY_NAME + "%'"; 24 } 25 return OracleHelper.ExecuteDataset(CommandType.Text,sql); 26 }
把编译的sql放到Developer 没问题能正确查出数据，但是报ORA-00936 缺失表达式，下面是正确的代码
实例--正确的实例
1 /// <summary> 2 /// 获取城市信息结果集 3 /// </summary> 4 /// <returns></returns> 5 public DataSet GetCityDS(CityModel cityModel) 6 { 7 string sql = @"select t1.CITY_ID,t1.CITY_NAME,t1.PRO_ID,(select t2.PRO_NAME from T_BASE_PROVINCE t2 where t2.PRO_ID = t1.PRO_ID) PRO_NAME 8 from T_BASE_CITY t1 9 where 1 = 1 10 "; 11 if ((!"".Equals(cityModel.CITY_ID)) && (cityModel.CITY_ID != null)) 12 { 13 sql += " and t1.CITY_ID like '%" + cityModel.CITY_ID + "%'"; 14 } 15 if ((!"".Equals(cityModel.CITY_ID_NEW)) && (cityModel.CITY_ID_NEW != null)) 16 { 17 sql += " and t1.CITY_ID like '%" + cityModel.CITY_ID_NEW + "%'"; 18 } 19 if ((!"".Equals(cityModel.CITY_NAME)) && (cityModel.CITY_NAME != null)) 20 { 21 sql += " and t1.CITY_NAME like '%" + cityModel.CITY_NAME + "%'"; 22 } 23 return OracleHelper.ExecuteDataset(CommandType.Text,sql); 24 }
总结：竖着写有可能出错，可能有中文之类的空格符，建议先紧紧横着写，然后再转换成竖写的形式。