If you extend this requirement to the 4 tables and the original data in them, then your query in your first post is correct.
You should see 14 records as per your expectation here.
How would one go about creating 'day' tables based on the timestamp field.
I have some 'import' tables which contains data from various days and would like to spilt that data up into 'days' based on the timestamp field in new tables.
TABLE_IMPORT1
TABLE_IMPORT2
TABLE_IMPORT3
... (2 Replies)
Hi all,
I have 2 mysql databases running on two different servers (both can be accessed via ssh to each other).
If I have say table ABC on server 1, how can I sync it with table ABC on server 2 if the number of records is different? Both databases are the same structure though server 2 has... (2 Replies)
Hello everybody,
I'm having troubles creating a relation between two tables in a MySQL database.
Having two tables, being one which contains users information (username, password, user ID, etc) and the other the one which contains transactions information (operation type, user ID of the user who... (2 Replies)
Hello all;
I have been really frustrated with finding the correct perl code (and MySql statements) to accomplish what I thought was straight forward...I have tested I don't know how many different codes\suggestions I found on the net without any success...but anyhow let me explain my plight and... (0 Replies)
my queryis :
select distinct m.name, item_count, item from master m join client p on m.name=p.name where item_count = 1 and item > 1;
But how should I update them?
i used update statetment :
Update from client Set item =1 where m.name=p.name and item_count=1 AND item>1
Is this wrong? (1 Reply)
What I have:
I have a input.sh (script which basically connect to mysql-db and query's multiple tables to write back the output to output1.out file in a directory)
note: I need to pass an integer (unique_id = anything b/w 1- 1000) next to the script everytime I run the script which generates... (3 Replies)
Discussion started by: kkpand
3 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.8.4 2005-05-03 SHELL-QUOTE(1p)