csharp，using (SqlConnection connection = new SqlConnection(connectionString))，{， string query = "SELECT columnName FROM tableName";， SqlCommand command = new SqlCommand(query, connection);， connection.Open();， SqlDataReader reader = command.ExecuteReader();， while (reader.Read())， {， string value = reader["columnName"].ToString();， // 处理数据， }， reader.Close();，}，`，，确保替换 connectionString、tableName 和 columnName` 为你的实际值。，在ASP中，通过输入号码查询数据库的两个表可以使用SQL语句结合两个表进行查询。，``GROUP BY和HAVING子句。SELECT column1, column2, COUNT(*) FROM table_name GROUP BY column1, column2 HAVING COUNT(*) > 1;。asp，，``AND 或 OR 运算符，SELECT * FROM table WHERE keyword1 AND keyword2;。php，$db = pc_base::load_model('database');，$result = $db>get_one(array('conditions' => 'id=1'));，``，，这段代码加载了数据库模型，并查询 id 为 1 的记录。Powered By Z-BlogPHP 1.7.3
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