06-29-2010
Quote:
In the real world, I have a big table containing a huge number of uploaded files.[...]
Well,
first of all, I think, you should rethink the
relational design.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have a file with multiple records...and I have to select records based on first column....here is the sample file...
I01,abc,125,1a2,LBVI02
I01,abc,126,2b5,LBVI02
I02,20070530,254,abc,LLBI01
I02,20070820,111,bvd,NGBI01
I need all records with I01 in first field in one file and... (8 Replies)
Discussion started by: mgirinath
8 Replies
2. Shell Programming and Scripting
hi..
i need to optimize my select query ..
my situation is like this ..
i have 15 lac recors in my table..
the following query takes nine seconds to give the required output..
SELECT max(ah.AUC_AMT),
SUBSTRING_INDEX(GROUP_CONCAT(SUBSTRING_INDEX(ah.AUC_CUS_NAME,'@',1) order by AUC_AMT... (0 Replies)
Discussion started by: senkerth
0 Replies
3. UNIX for Advanced & Expert Users
hi..
i need to optimize my select query ..
my situation is like this ..
i have 15 lac recors in my table..
the following query takes nine seconds to give the required output..
SELECT max(ah.AUC_AMT),
SUBSTRING_INDEX(GROUP_CONCAT(SUBSTRING_INDEX(ah.AUC_CUS_NAME,'@',1) order by AUC_AMT... (1 Reply)
Discussion started by: senkerth
1 Replies
4. UNIX for Dummies Questions & Answers
Hi, I would just like to know how to get the file with the max filename on a directory and get rid of all the others. For example, in directory A:/ i have the ff files:
APPLE2001
APPLE2002
APPLE2003
GRAPE2004
what I want to get is the max in files whose filenames start with APPLE*,... (4 Replies)
Discussion started by: madden
4 Replies
5. Shell Programming and Scripting
I have a file with 3 columns
I want to get the record with the max salary. If there are more than 1 record having the highest salary, i want any one of them.
empid,ename,Sal
1,abc,100
2,def,200
3,xyz,300
4,pqr,100
5,mnq,300
Output
Any record with 300 as salary
Please use next... (1 Reply)
Discussion started by: traininfa
1 Replies
6. Programming
I feel stupid for asking this because it seems that MYSQL code isn't working the way that I think it should work.
Basically I wrote code like this:
select * from `Test_DC_Trailer` HAVING max(DR_RefKey);
Where the DR_RefKey is a unique numeric field that is auto iterated (like a primary key)... (7 Replies)
Discussion started by: Astrocloud
7 Replies
7. Shell Programming and Scripting
I want records which have more than one and different value in the second column on the below sample file.
Ex, I have the samle file below :-
XYZ 1
XYZ 3
abc 1
abc 1
qwe 2
qwe 1
qwe 3
I want to select XYZ and QWE line only. (6 Replies)
Discussion started by: Sanjeev Yadav
6 Replies
8. Programming
Dear community,
I woul like to make a query to output all the users having the same IP address.
The table is somethig like:
name logged_ip
==== =========
user1 127.0.0.1
user2 127.0.0.2
user3 127.0.0.3
user4 127.0.0.1
user5 127.0.0.2
user6 127.0.0.5I used this query... (4 Replies)
Discussion started by: Lord Spectre
4 Replies
9. Shell Programming and Scripting
Hello,
I am working on an application that uses allot of memory depending on the input. I am also working on more than one processing algorithm.
The program has a long processing time (hours) so it would be nice to be able to monitor the maximum memory footprint of the application during runs... (1 Reply)
Discussion started by: LMHmedchem
1 Replies
LEARN ABOUT DEBIAN
cvm-mysql
cvm-mysql(8) System Manager's Manual cvm-mysql(8)
NAME
cvm-mysql - MySQL module
SYNOPSIS
cvm-mysql
CREDENTIALS
Pass phrase
DESCRIPTION
This module queries a MySQL database for the account name, compares the stored pass phrase with the given one using crypt(3).
CONFIGURATION VARIABLES
CVM_MYSQL_DEFAULT_FILE
The full path of the defaults file to read if the following variable is set. If not set, the file $HOME/.my.cnf will be read (the
MySQL default).
CVM_MYSQL_DEFAULT_GROUP
If set, the module will read connection default options from the named group in the defaults file as above
CVM_MYSQL_HOST
The hostname or IP of the MySQL server. If not set, a connection to the local host is assumed.
CVM_MYSQL_USER
The MySQL login ID to connect as. If not set, the invoking user is assumed.
CVM_MYSQL_PASS
The password for the above user.
CVM_MYSQL_DB
The database name, must be set.
CVM_MYSQL_PORT
The port number for the TCP/IP connection (only used if the server is not local).
CVM_MYSQL_POSTQ (optional)
The SQL query to execute after the credentials have been validated, see cvm-sql(7).
CVM_MYSQL_PWCMP (optional)
The password comparison module to use.
CVM_MYSQL_SOCKET
The path to the socket that should be used for connections to a local server.
CVM_MYSQL_QUERY (optional)
The SQL query to issue to retrieve the row containing the account information from the database, see cvm-sql(7).
SEE ALSO
cvm-sql(7), cvm-pgsql(8), cvm-pwfile(8), cvm-qmail(8), cvm-unix(8), cvm-vmailmgr(8), cvm-benchclient(8), cvm-checkpassword(8), cvm-test-
client(8)
http://untroubled.org/pwcmp/pwcmp.html
http://untroubled.org/cvm/cvm.html
cvm-mysql(8)