CREATE TABLE zTest_TBL ( TestID int NULL) INSERT INTO zTest_TBL (TestID) Values (1)<?php$iTestID=1;$oConnection = new PDO($dsn);$oStatement = $oConnection->prepare('SELECT TestID FROM zTest_TBL WHERE TestID IN (SELECT TestID FROM zTest_TBL WHERE TestID = :TestID)');$oStatement->bindParam(':TestID', $iTestID,PDO::PARAM_INT );$oStatement->execute() or print_r($oStatement->errorInfo());$connection = sqlsrv_connect($dsn);$statement = sqlsrv_prepare($connection, 'SELECT TestID FROM zTest_TBL WHERE TestID IN (SELECT TestID FROM zTest_TBL WHERE TestID = ?)', array($iTestID));$value = sqlsrv_execute($statement);print_r(sqlsrv_errors());?>