...what I need to do is to great the array of values that will populate for the dropdown list. ie if Max=6, Min=0, increment=2 then I need the query to produce 0, 2, 4, 6
Just a quick note here - MySQL does not have features that would make creating such a query easy. It does not support recursive "with" subqueries (also called CTEs - Common Table Expressions). It does not support hierarchical queries. It does not provide pipelined functions or functions to generate a series of numbers.
Given all these limitations, your best bet for a database query would be to pre-populate a table of integers and use it to return the number series you want. And then again, there is the problem of how many rows the table should contain, if its load is static.
The hassle-free alternative is to fetch those three values (min, max, increment) in PHP and generate the numbers in there. I do not know PHP, but by looking at the "for" loops the others have posted here, it doesn't look that complicated.
---------- Post updated at 11:23 PM ---------- Previous update was at 10:52 PM ----------
Nevertheless, the approach mentioned above for the database query is posted here. Let's say you **know** beforehand that the min value will never be below 0 and the max value will never be above 10. Then you can populate an "iterator" table (called "numbers" in the example below) with values from 0 to 10.
The rest should be easy to comprehend:
The limitation of this method should be easy to see. If you update the max value in the dropdown table to 1000, then the final query will return incorrect result unless you load numbers at least till 1000 in the iterator table.
I'm trying to iterate a UNIX awk script that returns min/max temperature data for each day from a monthly weather data file (01_weath.dat). The temperature data is held in $5. The temps are reported each minute so each day contains 1440 temperature enteries. The below code has gotten me as far as... (5 Replies)
hi!
i have a file like the attachement.
I'd like to get for each line the min, max and average values. (there is 255 values for each line)
how can i get that ?
i try this, is it right?
BEGIN {FS = ","; OFS = ";";max=0;min=0;moy=0;total=0;freq=890}
$0 !~ /Trace1:/ {
... (1 Reply)
Hi,
I have a text file containing numbers. There are up to 6 numbers per row and I need to read them, check if they are 0 and if they are not zero check if they are within a given interval (min,max). If they exceed the max or min they should be set to max or min respectively, if they are in the... (4 Replies)
Hello Experts,
I have got a txt files which has multiple columns, I want to get the max, min and diff (max-min) for each column in the same txt file. Example:
cat file.txt
a 1 4
b 2 5
c 3 6
I want ouput like:
cat file.txt
a 1 4
b 2 5
c 3 6
Max 3 6
Min 1 4
Diff 2 2
awk 'min=="" ||... (4 Replies)
Hi all,
I have a list of numbers. I need an awk command to find out the numbers of elements (number of numbers, sort to speak), the average value the min and max value. Reading the list only once, with awk.
Any ideas?
Thanks! (5 Replies)
I need to use awk for this task !
input (fields are separated by ";"):
1%2%3%4%;AA
5%6%7%8%9;AA
1%2%3%4%5%6;BB
7%8%9%10%11%12;BBIn the 1st field there are patterns composed of numbers separated by "%".
The 2nd field define groups (here two different groups called "AA" and "BB").
Records... (8 Replies)
Gents,
I have a big file file like this.
5100010002
5100010004
5100010006
5100010008
5100010010
5100010012
5102010002
5102010004
5102010006
5102010008
5102010010
5102010012
The file is sorted and I would like to find the min and max value, taking in the consideration key1... (3 Replies)
Hi to all,
Please help on the following problem, I'm not where to begin, if awk or shell script.
I have pairs of ranges of numbers and I need to find the root or roots of ranges based on min Range and Max ranges
Example #1:
If min range is 120000 and max ranges 124999, it means that are... (5 Replies)
Discussion started by: Ophiuchus
5 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)