select 0 from dual

Funny test of dual table C:/> sqlplus "/As sysdba" SQL * Plus: Release 9.0.1.0.1-production on Thu Aug 8 09:20:57 2002 (C) Copyright 2001 Oracle Corporation. All rights reserved. Connected:Oracle9i Enterprise Edition Release 9.0.1.1.1-ProductionWith

1, the use of dual table Dual is an actual table in Oracle that can be read by any user and is often used in a SELECT statement block that does not have a target table (1) View current connected users Sql> Select User from dual; USER -----------

Problems caused by table sys. dual being cleared A few days ago, I received a report from the application staff saying that the application could not connect to the database and reported the ORA error. This is an Oracle 9.2.0.8 RAC database (it has

3. Single-line function3.1 Conversion functionsSelect ASCII (' A '), Chr (+) from dual;Select To_char (1243123), 1231451 from dual;On the left is the string, on the right is the numberSelect To_char (123512a121) from dual; --wrong notation, no

Abstract:For the PC104 SCM/deth dual-port ethernet card, an intelligent dual-redundancy Network Driver Based on the Vxworks system is designed, the driver provides functions such as network communication fault diagnosis and intelligent switching

  VPN Series 6: Comparison of Dmvpn instances in cisco dual-center single cloud and dual-center dual cloud Redundancy Design Prerequisites Router ios version 650) this. width = 650; "border =" 0 "alt =" "src =" http://www.bkjia.com/uploads/allimg/131

Dual-host switch (NewStartHA, SKYbility, hacmp, hp unix dual-host), hpux dual-host 1. Suse linux (NewStartHA ):# Cli Cli: ~>Service-migrate Select service to migrate: Current service: 0) bill 1) gdb 2) cancel Select a service [0, 2]: Enter the

Author: Tang Xiaoye, Zhang Li, Chen Zhiqiang, Gao hewei, and Zhang Guowei 【Abstract]This article introducesComputingThe dual-energy fluoroscopy (DR) Material Recognition Algorithm for tomography (CT). This algorithm is based on the single-energy

　One of the most notable changes in the 2014 was that the two-live data center spanned the conceptual hype and was accepted by many business users. HDS presents a new dual-live mode--gad (Global-active Device), which provides a solid guarantee for

Destructive Testing of dual tables With regard to dual table destructive testing, since it is a destructive test, it needs to be determined that this test is limited to testing or personal learning, and some SQL statements may seem extremely simple,