oracle c＃如何用变量绑定变量

I have this query

我有这个问题

 string query = "SELECT * from IMALSO3.V_BN_IVR_ACCT_BAL_MNO WHERE PHONENO Like '%':mobileNumber";

                    using (OracleCommand cmd = new OracleCommand(query, conn))
                    {
                        cmd.Parameters.Add("mobileNumber", phone8Digits);
 string query = "S