I. gap sequence
SQL> alter database open;Alter database open*Row 3 has an error:An error is reported when the slave database recovers from open to the standby database at the same time:
ORA-16004: backup database recovery requiredORA-01152: File 1
1 General Format
Printf (format control, output table column) for example: printf ("I = % d, CH = % C/N", I, CH );
Note:
(1) "format control" is a string enclosed by a dual-marker, also known as "Conversion Control string". It contains two types
# Use sleep () to simulate import timescale = 10 print ("---- execution start -----") for I in range (scale + 1): A = '* IB = '. '* (scale-I) C = (I/scale) * 100 print ("{: ^ 3.f} % [{}-> {}]". format (C, A, B) time. sleep (0.1) print ("----
Tag: false Code None Temp Data Control cat Filter SageWe have the learn open a file by using an Open button, this is code below:1 voidCfilecrcdlg::onopen ()2 {3 //Todo:add your control notification handler code here4 WORD N;5 WORD i;6BYTE szchar[
Recently looked at the cmd command, found that some use it is very convenient. So decided to put these DOS commands sorted out, easy to write. bat batch file.1 to see first. What is Cmd,.bat:
. BAT is a DOS batch file;. cmd is another batch file
First, the preparatory work:
1. Prepare the Microsoft Windows 98 installation CD.
2. If possible, scan all hard drives with ScanDisk before running Setup to check for hard drive errors and fix them, otherwise setup will be troublesome if you check
First of all, before making a key recovery, to determine that there is no important information in C, including the desktop, My Documents, if there is, to be copied to D disk in advance;
Second, start to do a key recovery, divided into the
Computer use a long time will always appear a variety of problems, the most common has a blue screen problem, desktop icon error problem and boot into the system problem, today we say the third question, when the Win7 computer can not enter the
If there is no optical drive, floppy drive, u disk, and the system partition regardless of FAT or NTFS format, then how the new XP system Download 2013 of the latest version of the hard disk installation , here to introduce some of the system to
Many people want to install Win7 and WinXP under the same hard disk partition, such as installing Windows 7 and Windows XP under C, but don't know how to do it, and installing Win7 and XP into the same disk in a normal installation is problematic,
first, the use of Pg_dump:Import and export of databases is one of the most commonly used features, each of which provides tools such as Oracle's Exp/imp,informix Dbexp/dbimp,mysql mysqldump, and PostgreSQL provides a corresponding tool for Pg_ Dump
Introduction of SeleniumSelenium is a functional automated test tool for Web applications, Selenium runs directly in the browser, just as the real user is doing.Because of this nature, selenium is also a powerful network data acquisition tool, it
I. BACKGROUND
When debugging code, every time through git upload to the server debugging, it is a very troublesome thing. So for some minor changes, I'm going to modify it directly on the server. After debugging successful, with Git reset and then
JS 1. Template elements
A. refers to static html/xml content
2. Note
N HTML Comments: displaying annotations ]--> on the client
N Hide comments: Write in JSP program, but not to customer
3. Scripting elements
A. Statement (Declaration)
n
Requirements: Use VIM to develop Python for simple configurationCD to the user host directory vim. VIMRC paste the following:Version One:Set Encoding=utf-8"Remove the consistency of VI"Set nocompatible"Show line number"Set numberSet NobackupSet
first, the use of Pg_dump:Import and export of databases is one of the most commonly used features, each of which provides tools for this, such as Oracle's Exp/imp,informix Dbexp/dbimp,mysql mysqldump, and PostgreSQL provides a corresponding tool
Linux and winxp3 dual system installation questions-general Linux technology-Linux technology and application information, the following is a detailed reading. Currently, WINXP3 is used. A system fault occurred a few days ago. After the winxp system
CauseA few days ago, my colleague told me that his computer system could not be guided. It turns out that he used Ghost for system restoration. In the past, his 40 Gb hard drive was divided into five areas: C, D, E, F, and G. Windows 98 is installed
first, the specific requirements:1:C-style comments/*/comments converted to standard C + + style//annotations2://style annotations remain the same3: All conversions are subject to grammatical rules4: Note Translation requires support for comment
Machine:Select instance_name from v $ instance;Select name from v $ database;Select name from v $ datafile;Log query mode:Archive log list;Shutdown immediate;Startup mount;Change the log archive mode:Alter database archivelog;Alter database
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