Sponsored Content
Full Discussion: how this works?
Top Forums Programming how this works? Post 302232244 by vidyadhar85 on Thursday 4th of September 2008 07:24:28 AM
Old 09-04-2008
Quote:
Originally Posted by vijay_0209
pls explain me how this works....

DECODE (SUBSTR (field, 1, 1),'''', '''''' || field || '''','''' || field || '''')


here field is a column in an oracle table....
it means if substr of field column that is from 1st char to 2nd char is " a double quote it will be decoded as two double quotes ""concated with field then again a double quote and a single quote or else "' concated with field and "'
decode works as nested if or switch case..
for more info on decode just search in google...
 

10 More Discussions You Might Find Interesting

1. Linux

How does NORET_TYPE works ?

Hi, I was looking at the panic() code in linux kernel which is defined as: 51 /** 52 * panic - halt the system 53 * @fmt: The text string to print 54 * 55 * Display a message, then perform cleanups. 56 * 57 * This function never returns. 58 */ 59 60 NORET_TYPE void panic(const char *... (1 Reply)
Discussion started by: amit4g
1 Replies

2. Shell Programming and Scripting

Help it works but its to SLOW

I am a novice at shell scripting. I have managed to cobble together a script that does exactly what I need it to do. However I am gathering information from 700+ devices. This script takes hours to complete the task. Is there a better way of doing it than what I have listed here? This script... (10 Replies)
Discussion started by: Garlandxj
10 Replies

3. UNIX for Dummies Questions & Answers

How ls | wc -l works?

ls displays files in tabbed output. Say a directory contains 3 files. ls will list all 3 in one line. So, I expect ls | wc -l to give 1, but it counts the nr of files and gives 3. Can someone explain how this works? (3 Replies)
Discussion started by: krishmaths
3 Replies

4. Shell Programming and Scripting

Still trying to get a grep -c that works

I am trying to get a count of each line sub runit2 { my ($file1a, $file2a) = @_; my $file1_vala = $file1a->get; my $file2_vala = $file2a->get; open (FILE1a, "$file1_vala") or die; open (FILE2a, "$file2_vala") or die; chomp(my @strings = <FILE2a>); while (1) { foreach $pattern... (4 Replies)
Discussion started by: popeye
4 Replies

5. UNIX for Dummies Questions & Answers

>./a.pl works, >a.pl - does not

When I try to execute script, I get message: >aa.pl zsh: command not found: aa.pl but >./aa.pl works OK. What to change in environment to force the former way to work? Thank you, Alex Z (4 Replies)
Discussion started by: zzol
4 Replies

6. UNIX for Advanced & Expert Users

How this works?

I have a program............ #include<stdio.h> #include<unistd.h> main() { if(fork == 0) { printf("Hi every body:p!!!!!!!!!!"); } } This program works with out any error. here fork is not a system call. It just act as a variable.But how it works without declaring it? What data type it... (19 Replies)
Discussion started by: carolsanjeevi
19 Replies

7. Shell Programming and Scripting

[ask]how does sed -e 's/<[^>]*>//g' works?

I found this command, sed -e 's/<*>//g', will return the content of a line with pattern something like this, <tag1>content</tag1>.. How does this works? What does sed -e 's/<*>//g' actually do? What if I wanted to get content of a line with pattern something like this, content? thanks.. (5 Replies)
Discussion started by: 14th
5 Replies

8. Shell Programming and Scripting

How does a if works in shell

Hi, I need to compare and get an output for values greater than "X10" (values contain both characters and numbers) using if loop... FOR EG: I want to export values greater than X10, i.e., in-case if the value is X11 and greater than the "if" part to be executed if the value is X9 and... (2 Replies)
Discussion started by: shivashankar_S
2 Replies

9. UNIX for Dummies Questions & Answers

How zcat works?

Hi, just i would like to know, how will be the response if you try to read a 40GB compressed file using zcat. a)Uncompress the 40GB file and have it in the disk. use cat to view the steps. b)Use zcat directly to view the compressed file? What are the steps being occurred in step (b)? Where... (3 Replies)
Discussion started by: pandeesh
3 Replies

10. Shell Programming and Scripting

How mailx -r works?

I'm using Sun Solaris. I used mailx -r "MyEmailId" -s "sub" "toEmailID" from my unix id and it worked. But when i run the same script from other's unix id it works as well. mean any one in my environment can mail to other's email without my knowledge. My questions are How it works and why it... (1 Reply)
Discussion started by: kg_gaurav
1 Replies
LESSECHO(1)                                                   General Commands Manual                                                  LESSECHO(1)

NAME
lessecho - expand metacharacters SYNOPSIS
lessecho [-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-ex] [-a] file ... DESCRIPTION
lessecho is a program that simply echos its arguments on standard output. But any metacharacter in the output is preceded by an "escape" character, which by default is a backslash. OPTIONS
A summary of options is included below. -ex Specifies "x", rather than backslash, to be the escape char for metachars. If x is "-", no escape char is used and arguments con- taining metachars are surrounded by quotes instead. -ox Specifies "x", rather than double-quote, to be the open quote character, which is used if the -e- option is specified. -cx Specifies "x" to be the close quote character. -pn Specifies "n" to be the open quote character, as an integer. -dn Specifies "n" to be the close quote character, as an integer. -mx Specifies "x" to be a metachar. By default, no characters are considered metachars. -nn Specifies "n" to be a metachar, as an integer. -fn Specifies "n" to be the escape char for metachars, as an integer. -a Specifies that all arguments are to be quoted. The default is that only arguments containing metacharacters are quoted SEE ALSO
less(1) AUTHOR
This manual page was written by Thomas Schoepf <schoepf@debian.org>, for the Debian GNU/Linux system (but may be used by others). Send bug reports or comments to bug-less@gnu.org. Version 487: 25 Oct 2016 LESSECHO(1)
All times are GMT -4. The time now is 11:19 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy