General :: Looping Through A Shell Script With Sql Statements?
Oct 7, 2009
I'm working on the Solaris environment and the DB i'm using is Oracle 10g. Skeleton of what I'm attempting; Write a ksh script to perform the following. I have no idea how to include my sql query within a shell script and loop through the statements. Have therefore given a jist of what I'm attempting, below.
1. Copy file to be processed (one file at a time, from a list of 10 files in the folder ).
Code:
for i in *
do
cp $i /home/temp
2 . Create a snapshot(n) table : Initialize n = 1
Code:
create table test insert account_no, balance from records_all; -- creates my snapshot table and inserts records in SQL
3. Checking if the table has been created successfully:
Code:
select count(*) from snapshot1 -- query out the number of records in the table -- always fixed, say at 400000
Code:
if( select count(*) from snapshot(n) = 400000 )
echo " table creation successful.. proceed to the next step "
else
echo " problem creating table, exiting the script .. "
4. If table creation is successful,
Code:
echo " select max(value) from results_all " -- printing the max value to console
[code]....
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May 21, 2010
I have made some modifications to the init script that runs when my PC boots to take me to a /bin/sh shell so I can run some custom scripts. When I exit from here the init statement should mount the root file system and switch_root to it. This all works correctly however the same init statement will be run on two types of pc's and the address of the root fs is different between them. On one PC it sits on /dev/sda1 and on the other /dev/hda1. To select the appropriate addresses I used dmesg to find out if it was the i5 PC and if/else statements to select the right hard drive location.
When I try use a if/else statement in the init script it ends up preforming both the if and the else code. Is there any reason the if else statements wouldn't work the exact same in the init script (it's all shell scripts isn't it?
[Code]...
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Sep 4, 2010
while learning to write bash scripts, i decided to write some script that, given an integer as input, will tell you the square root of that integer (provided the integer in question is a perfect square). i have already done on using primarily if statements and a while loop. i decided that using a case statement would be a lot simpler and i would be able to make the script more functional. here is what i have so far
[Code]....
i have tried all posible combos of using -ge or >= but i get pretty much the same thing.
the idea is, for now, if the input is greater than or equal to 0 that it will echo test. can you do this sort of thing with case statements? or will it only work if i give it specific values like [1-9] (if this is the case then i dont think the case statement will work for what i want to do)
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Feb 21, 2011
how to change the value of the inputs in sed while looping
As such:
for i in `seq 1 10`; do
"do something funny, using OpenFOAM"
cd system
sed 's/oldvalue/oldValue+increment/' -i sampleDict
cd ..
done
So basically, can you for instance create a constant "a" and increase it for every loop interval and use it for sed?
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Sep 1, 2010
I have a csv file (id, loc, timestamp, impressions) that I need to derive some low-level calculations from. Im ok with basic sort and grep operations, but this one is challenging my feeble scripting skills (normally I�d throw it into a spreadsheet, but in this case Id like to ultimately create a script that I could automate). Ive already used cat/sort to order the csv file first on location and then timestamp so it looks like this:
Abt001, AA, 2009-01-01 10:51:00, 231
Cup002, AA, 2009-01-01 10:54:00, 3
Saf001, AB, 2009-01-01 10:51:00, 25
[code]....
What Id like to do is output to file a record of the total, min, and max number of impressions for each location. , e.g.
AA6504 3231
AB252525
AC37925109
ZZ35512341
how to do this and Im kind of stuck on how to approach it I think the combined steps of looping through the locations along with the min/max/sum calculations are throwing me. Eventually Id also like to do additional calculations like average, ect. but I think I can figure that out on my own if I can just get this part down.
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Mar 12, 2011
comparing multiple items or conditions using 'if' statements? I want to do something if one or more conditions is true, for example:
If a = 1 or b = 1.
I've tried:
[Code]...
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Nov 2, 2010
I have a list of names (testnames.txt) and I have a set of log files (testlogdata.log). I'm trying to search the column in my log file for each of the names in my testnames.txt file, and output the result to individual files, name1.txt, name2.txt, name3.txt, etc the names in the column of my log file can appear in different formats , ie the name "Tom Smith" can appear as "tom_smith", "tom-smith", "ACME/tom.smith", "ACME/thomas.smith". etc. To allow for the variations, I have my names in the testnames.txt as expressions, ie, for tom smith, I use the expression "to.*smith", etc.I'm running the following command:
for i in $(cat testnames.txt); do awk '{if ($9~/$i/) print $0}' testlogdata.log > $ioutput.log; done
I want the command to read a value for i, insert it into the if ($9~/inserted value for i/, and dump each line from testlogdata.log into a file named <value-for-i>output.log.
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Oct 21, 2010
I for the life of me is having a hard time with some scripting in Dash with branching statements. What the heck? I read many tutorials all over the net and none of the codes work. They suggest all sorts of variations, but it ain't working for me. Can anyone tell me why the code below always return "Y"?
Code:
#!/bin/sh
clear
echo -n "---> Enter Y or N? "
read answer
if [ "$answer"="Y" ] ; then
[Code]...
Perhaps someone can give me a short explanation on how if statements work? So far my linux experience has been nothing, but a frustrating mess.
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Feb 5, 2011
I cannot seem to get if else statements to work. if $choice == Dog then i want it to say "you selected Dog" The variable choice has the value Dog in it as proved at the end by echo "yes $choice is $choice" following the error Code: ./test.sh: 37: [$choice: not found How do i get the conditional statement to work? What's wrong here? This is the full script:
Code:
#! /bin/sh
: ${DIALOG=dialog}
: ${DIALOG_OK=0}
[code]....
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Aug 11, 2010
I'm writing an if statement where a variable is a number such as 14.05 (this is actually a temperature) and I want to compare it to a predefined value, sample code below:
Code:
I have all sorts of errors regardless of how I do this (double quotes, square brackets). The best idea I've had is stripping off the decimal place so it's a 4 digit number (e.g warning=1503 and DEV_TMP=1405) however this seems a little unnescessary and I'm sure there's an easier way of achieving the same thing.
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Jun 18, 2010
I'm trying to execute some fairly simple code to transfer some files from one server to another.
$ cat xfer_directory.sh
#!/bin/bash
cd /cygdrive/g/directory/usr
[code]....
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Jun 9, 2010
I am using C++ with SQLite db in a program that will read read a sub set of records, compare records and write different records to another database. I have a SQLite book, but it only shows examples for the C API. Anyone have code samples in C++ for the following:
Open database
Close
Select *
Read
Write
Or, just show me how to execute a SQL statement with C++ and I can then figure out the various SQL statements I need.
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Apr 5, 2010
I've had openSUSE for a week. The update says that there are 10 updates. When I run it, first I get a flag saying that something can't be removed. Then when I run the rest of the up date, it loops back and starts over. I need a patch to fix the patch that fixes the patch that...etc.
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Mar 10, 2010
I have 9.10 installed, grub has loaded and worked, now all of a sudden nothing will boot.The HP screen comes up and then the computer reboot, constant reboot cycle. Can't even get into the BIOS. It will just sit there if I hit escape. Won't boot the live cd either. What can I do??? It has worked fine for the past month now.
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Nov 2, 2010
I've written a bash script to connect to each machine in our local network and update the fstab file to point certain NFS mounts to a new location.The script is meant to read in a list of shares and a list of workstations, rsync the relevant share then connect to each workstation and update the fstab file before moving onto the next share.In reality what is happening is it will perform the loop correctly for the first workstation in the list but will not move on to the next one. I'm really stumped on this and I'm sure it's something simple but I just can't seem to work out the answer!
Code:
#!/bin/bash
SHARES=$1
[code]....
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May 27, 2011
I have a simple .bashrc backup script I've been working on, but my external hard drive needs to be plugged in for it to work. So I set up a while loop, that exits after the hard drive has been plugged in and backed up. Here it is:
Code:
#/bin/bash
pluggedin=1
[code]....
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Sep 15, 2010
I am querying a single string column in a table. The string values have spaces in them. I want to loop over each value in bash. I set IFS to split lists on newlines instead of spaces. When I try this, it is splitting the list of results on the actual character 'n', not the newline ''.
DATA=`mysql -u root -ppassword --silent 'SELECT name FROM table_a;'`
IFS=$'
'
for i in $DATA; do
echo "item = $i"
[Code]....
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Sep 24, 2010
I created the following.
x="top
middle
bottom"
I would like to make the following work.
while read line
do
echo $line
done
instead of importing a file I would like to use the variable $x I tried using pipes, but with no luck. My goal is to read one line at a time, but not have to export my data to another file, I would like to keep it all within one script.
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Nov 3, 2010
I want to itemize addition for each type of transactions. The example below is for 3 days,10/13/2010, 10/14/2010, & 10/15/2010.
PROD =89.25+89.25+104.47= 282.97
TAX =9.37+9.37+10.37 = 29.71
ETAX = 1+1+1 = 3
[code]...
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Jun 15, 2011
MACHINE: HP Proliant DL260G5OS: SLES 11 SP1kernel: Linux xserver 2.6.32.12-0.7-default #1 SMP 2010-05-20 11:14:20 +0200 x86_64 x86_64 x86_64 GNU/LinuxIt is used as remote xserver in a LAN.I have configured /usr/lib/restricted/bin/.rbashrc with some environment variables but when the users logon in the system finally is executed $HOME/.bashrc and some environment vars are overwritten.
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Oct 18, 2010
Why, after a successful (I thought) dual boot installation w/ a side-by-side lynx and meerkat install and XP does my system refuse to boot? It just gets to the Dell screen, giving boot options (none of which are making any difference) and keeps looping it. Last night, after re-installing the grub (lost after the XP install) everything was working fine. I powered down and this morning tried to restart and...this. I really don't want to have to reinstall everything and reconfigure and reinstall apps--what can I do? And more importantly, WTF did this happen to begin with?
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Jun 28, 2011
I have an Excel Spreadsheet which reports upon weekly performance. One portion of the worksheet looks at week over week increases /decreases. I've placed a number of image controls (15 in Total) next to cells which calculate week over week change. The image controls simply display an image depending on whether the value of the adjacent cell is positive or negative. So, here is my basic working IF statement:
Code:
Private Sub Worksheet_Change(ByVal UpDown As Range)
If Range("J26") > 0 And IsNumeric(Range("J26").Value) Then
Image1.Picture = LoadPicture("C:path oup_arrow.gif")
ElseIf Range("J26") < 0 And IsNumeric(Range("J26").Value) Then
[code]....
As you can see, this is pretty simple. What I'd like to do is find a way to loop through all 15 controls and avoid having 15 IF statements run on the Worksheet_Change() event. The cells containing the week over week values are all in the same column, but not continuous. Involved cells are: ("J26", "J27", "J33", "J34", "J35", "J36", "J37", "J38", "J39", "J40", "J42", "J43", "J44", "J45", "J46")
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Apr 27, 2011
I would like know when it is necessary or advisable to write a shell script instead of shell function ?
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Jan 18, 2011
I am wondering if I can open a shell or new terminal thing from within the terminal in a unix/linux enviroment. Particularly a commandline only one where there is no GUI. Is this doable? how do I do it?
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Mar 14, 2010
I want to change my default shell to tcsh. I used
Code:
usermod -s /bin/tcsh username
command as given at url
But if I open a new shell, it is still a bash shell.
How do I make my default shell as tcsh?
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Jul 26, 2010
I am using ubuntu10.04-server 64bit AMD with fluxbox. After I ran Matlab in a shell (without GUI) the shell does not display characters anymore, but will execute any command, I just can't see the characters that I'm typing.. I use aterm and xterm, does anybody know why that is, am I missing a package?
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Apr 14, 2011
Is there any way I can switch my desktop shell from unity to, say, gnome-shell? I can switch using other console shell I like (bash, csh, fish, etc.). Assume that there is a stable alternative desktop shell, I should be able to choose, too.
(For console shell, we goes to /etc/passwd. But for desktop, I can't find the way to config.)
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May 21, 2009
Is there a way to export a variable to parent shell in shell scripting ?
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Jun 5, 2011
I am trying to create a shell script similar to ls, but which only lists directories. I have the first half working (no argument version), but trying to make it accept an argument, I am failing. My logic is sound I think, but I'm missing something on the syntax.
Code:
if [ $# -eq 0 ] ; then
d=`pwd`
for i in * ; do
if test -d $d/$i ; then
echo "$i:"
code....
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Jun 25, 2010
Is there some type of functional way to read things in the Python shell interpreter similar to less or more in the bash (and other) command line shells?
Example:
Code:
>>> import subprocess
>>> help(subprocess)
...
[pages of stuff to read]
...
I'm hoping so as I hate scrolling and love how less works with simple keystrokes for page-up/page-down/searching etc.
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