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select a.*, level from dlsys.tcUnit a where nvl(validFlag,1) = 1 start with SeniorUnitId is null connect by SeniorUnitID = prior UnitID order siblings by DisplayOrder Oracle中的select语句可以用start with ... connect by prior ...子句实现递归查询，connect by 是结构化查询中用到的，其基本语法是： select ... from where <过滤条件，用于对返回的所有记录进行过滤> start with <根结点的限定语句，当然可以放宽限定条件，以取得多个根结点，实际就是多棵树> connect by [prior] <连接条件，其中用prior表示上一条记录，比如：connect by prior t.id = t.parent_id就是说上一条记录的id 是本条记录的parent_id，即本记录的父亲是上一条记录> 下面我们直接来看实例，查询'KING'的所有下属雇员。SQL语句如下： [sql] view plain copy select * from scott.emp e start with e.ename = 'KING' connect by

I am having difficulty with getting this work. I can connect to the database without problem, however I can not make it show me the html page. It does not run. import java.io.*; import java.sql.*; import java.text.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; public class ShowBedrock extends HttpServlet { public String getServletInfo() { return "Servlet connects to PostgreSQL database and displays result of a SELECT"; } private Connection dbcon; // Connection for scope of ShowBedrock // "init" sets up a database connection public void init(ServletConfig config)

I am trying to connect to a database (MySQLi) just once, but am having problems doing so. How do I make a connection global for the entire script? There are multiple files (index.php, /classes/config.class.php, /classes/admin.class.php, etc). I've tried the following: In: config.class.php public static $config = array(); public static $sql; function __construct() { // database db::$config['host'] = 'localhost'; db::$config['user'] = '_'; db::$config['pass'] = '_'; db::$config['db'] = '_'; // connect db::$sql = new mysqli(db::$config['host'], db::$config['user'], db::$config['pass'], db::

I've just started seeing a problem with Facebook Connect authentication. If I have version 3.4.4 of the iOS app installed, my delegate's fbDidNotLogin method gets called with an error message of "The user denied your request". When I uninstall the FB app, the authentication works fine. Is anyone else seeing this? Does anyone know how I can route around this bug? Here's my call to the Facebook object: [[app facebook] authorize:[NSArray arrayWithObjects: @"publish_stream", @"offline_access", nil] delegate:app]; Make sure your application bundle id is set correctly on your app's Facebook page. I

I downloaded SQLPLUS from Oracle: http://www.oracle.com/technetwork/topics/winx64soft-089540.html Basic Lite and SQL*Plus I then fired up SQL*Plus: c:\Program Files\Oracle\instantclient_12_1>sqlplus /nolog SQL*Plus: Release 12.1.0.2.0 Production on Wed Apr 15 15:25:36 2015 Copyright (c) 1982, 2014, Oracle. All rights reserved. and tried to connect to a database: connect user\password@hostname and received the error message: ERROR: ORA-12504: TNS:listener was not given the SERVICE_NAME in CONNECT_DATA What am I missing? I ran the queries suggested by Jakub, I got SQL> select sys_context(