Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

comparing the null values in the unix

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting comparing the null values in the unix
# 8  
Old 02-11-2008
change the if condition to

if [ -n "$AcctID" ]..

hope this helps
# 9  
Old 02-11-2008
i placed $ in script i forgot to place here Smilie wat the -n stands for
# 10  
Old 02-11-2008
tests whether the variable contains something
# 11  
Old 02-11-2008
You can use also :
Code:
if [ x"$AcctID" = x ] ...

# 12  
Old 02-12-2008
Depending on the shell used you could use:
[[ -n "${AcctID}" ]]
[[ "x${AcctID}" == 'x' ]]
[[ "${AcctID}" == '' ]]
While the last one you should avoid.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Replace null values in csv with zero

Hi, i have another issue: i have three files: FILE 1 ServiceEventHandler, Processed,Percentage 5285337,100% FILE 2 Wallet, Processed,Percentage 5285337,100% (1 Reply)
Discussion started by: reignangel2003
1 Replies

2. Shell Programming and Scripting

Check null values column

hi, I had a small question.I had a file from which i need to extract data. I have written the below script to check if the file exists and if it exists extract requierd columns from the file. IFILE=/home/home01/Report_1.csv OFILE=/home/home01/name.csv.out1 if #Checks if file exists... (1 Reply)
Discussion started by: Vivekit82
1 Replies

3. Shell Programming and Scripting

Handle null values-awk

I am using below code to validate the source file,code working fine but if any column contains null value then below code throwing error actually it should not.how to customize the below code to handle null null values also. When I run the script with below source data getting “date error”, as... (2 Replies)
Discussion started by: srivalli
2 Replies

4. Shell Programming and Scripting

Check for null values in columns

Hi , I have below data with fixed with of 52 bytes having three columns value data. 01930 MA GLOUCESTER 02033 02025 COHASSET 01960 MA ... (3 Replies)
Discussion started by: sonu_pal
3 Replies

5. Shell Programming and Scripting

How to use sort with null values?

Hello everyone I am doing a join command. Obviously, before I need two files sorted first. ( Both files have headers and have about 2 million lines each one ) The problem is, one of the files has null values in the key to sort (which is the first filed ). For example I have the original... (4 Replies)
Discussion started by: viktor1985
4 Replies

6. Shell Programming and Scripting

sorting null values

Hi I have a file with the values abc res set kls lmn ops i want to sort this file with the null values at the bottom of the file OUTPUT should look like this abc kls lmn ops (6 Replies)
Discussion started by: vickyhere
6 Replies

7. UNIX for Advanced & Expert Users

How to Compare Null values??

Hi, Can someone help me comparing Null values. Scenario is as follows: I have a variable which "cache_prd" which can have either some integer or nothing(Null) if it is integer I have to again do some comparision but these comparisons give me this error:( "line 32: [: 95: unary operator... (3 Replies)
Discussion started by: Yagami
3 Replies

8. UNIX for Dummies Questions & Answers

Check for null values in a column

Hi All, I have a file with 10 columns and get the required data for nine columns properly except 8th. In 8th column i have both NULL and NON NULL values...i.e certain records have values for all the columns including 8th column and certain records have 8th column as NULL.My requisite is,without... (20 Replies)
Discussion started by: ganesh_248
20 Replies

9. Shell Programming and Scripting

identifying null values in a file

I have a huge file with 20 fileds in each record and each field is seperated by "|". If i want to get all the reocrds that have 18th or for that matter any filed as null how can i do it? Please let me know (3 Replies)
Discussion started by: dsravan
3 Replies

10. Shell Programming and Scripting

handling null values in files

Hi , I have a script where i will remove header and trailer record and ftp to another server. I'm using the code: latestfilename=`ls filename_* | tail -1` echo "Latest filename = $latestfilename" sed '1d;$d' $latestfilename > a.ftpedfile I have an issue if input data is having null... (1 Reply)
Discussion started by: ammu
1 Replies
Login or Register to Ask a Question