06-07-2006
Capturing the values of column in one parameter
Hi,
I am trying to capture the values of a column in a parameter..here is what I wanted to do...
1,2,3,4
2,3,4,1
3,4,1,2
4,1,2,3
is there any way that I could get the values of column values into one parameter??
Here is what I want...
COL1=1,2,3,4
COL2=2,3,4,1
COL3=3,4,1,2
COL4=,4,1,2,3
I am just taking an example of 1234 and original file will not have same values in both rows and columns....
Is it possible??
Thanks,
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am having scenario where
input file is containing text like below
-----------------------------------
Name,x.y.z.i.j.k,p.q.r.s.t.k,y.d.f.u.g.h,e.r.t.yu.t.u,......
Place,Bangalore,hyderabad,Chennai,Delhi,............
I need to read and put it in file in a column structure
... (1 Reply)
Discussion started by: prasanta jena
1 Replies
2. Shell Programming and Scripting
Dear Guyz:)
I have 2 different input files like this. I would like to pick the values or letters from the inputfile2 based on inputfile1 keys (A,F,N,X,Z).
I have done similar task by using awk but in that case the inputfiles are similar like in inputfile2 (all keys in 1st column and values in... (16 Replies)
Discussion started by: repinementer
16 Replies
3. Shell Programming and Scripting
Hi All,
I have a file which is having 3 columns as (string string integer)
a b 1
x y 2
p k 5
y y 4
.....
.....
Question:
I want get the unique value of column 2 in a sorted way(on column 2) and the sum of the 3rd column of the corresponding rows. e.g the above file should return the... (6 Replies)
Discussion started by: amigarus
6 Replies
4. Shell Programming and Scripting
I have results from some statistical analyses.
The format of the results are as given below:
I want to select lines that have a p-value (last column) less than 0.05 from all the results files (*.results) and cat to a new results file.
It would be very nice if a new column is added that tells... (2 Replies)
Discussion started by: genehunter
2 Replies
5. UNIX for Dummies Questions & Answers
Hi Gurus,
I have a tab separated text file with two columns. I would like to make the first column values as headings for the second column values.
Ex.
>value1 subjects
>value2 priorities
>value3 requirements
...etc
and I want to have a file
>value1
subjects
>value2
priorities... (4 Replies)
Discussion started by: Unilearn
4 Replies
6. Shell Programming and Scripting
Hello All,
I have a below data in a .csv file where all rows where col1 is A, col2 is odd numbers, similarly even numbers for all rows where col1 is B.
Note that my data has some other columns(not shown here) too (around 100) after col2.
Tool,Data
A,1
A,3
A,5
....
so on
B,2
B,4
.... ... (4 Replies)
Discussion started by: ks_reddy
4 Replies
7. Shell Programming and Scripting
Hello,
I need to capture multiple values from user input and do not know how to do it. I'm writing a script to delete old files, but want to give the option to keep some by asking the user.
This is what my output looks like...
Old files to be deleted...
1 file1
2 file2
Then this bit of... (3 Replies)
Discussion started by: jrymer
3 Replies
8. Shell Programming and Scripting
Hi
I am pretty confused in returning and capturing multiple values
i have defined a function which should return values "total, difference"
i have used as
#!/usr/bin/ksh
calc()
{
total=$1+$2
echo "$total"
diff=$2-$1
echo "$diff"
}
I have invoked this function as
calc 5 8
Now i... (2 Replies)
Discussion started by: Priya Amaresh
2 Replies
9. Shell Programming and Scripting
Hello,
I am processing a tab delimited text file and need to grab all of the column headers in an array.
The input looks like,
num Name PCA_A1 PCA_A2 PCA_A3
0 compound_00 -3.5054 -1.1207 -2.4372
1 compound_01 -2.2641 0.4287 ... (5 Replies)
Discussion started by: LMHmedchem
5 Replies
10. UNIX for Beginners Questions & Answers
Hi,
On ksh
I have to write a script tha I will run like this:
./myscript.ksh -param1 val1 val2 val3 .. -param2 xxx -param3 hgf
Param1 will be an array:
param1= ( val1 val2 val3 ..... )
How can I do that?
It is not a homework!!
Thank you. (1 Reply)
Discussion started by: big123456
1 Replies
LEARN ABOUT REDHAT
analyze
ANALYZE(7) SQL Commands ANALYZE(7)
NAME
ANALYZE - collect statistics about a database
SYNOPSIS
ANALYZE [ VERBOSE ] [ table [ (column [, ...] ) ] ]
INPUTS
VERBOSE
Enables display of progress messages.
table The name (possibly schema-qualified) of a specific table to analyze. Defaults to all tables in the current database.
column The name of a specific column to analyze. Defaults to all columns.
OUTPUTS
ANALYZE
The command is complete.
DESCRIPTION
ANALYZE collects statistics about the contents of PostgreSQL tables, and stores the results in the system table pg_statistic. Subsequently,
the query planner uses the statistics to help determine the most efficient execution plans for queries.
With no parameter, ANALYZE examines every table in the current database. With a parameter, ANALYZE examines only that table. It is further
possible to give a list of column names, in which case only the statistics for those columns are updated.
NOTES
It is a good idea to run ANALYZE periodically, or just after making major changes in the contents of a table. Accurate statistics will help
the planner to choose the most appropriate query plan, and thereby improve the speed of query processing. A common strategy is to run VAC-
UUM [vacuum(7)] and ANALYZE once a day during a low-usage time of day.
Unlike VACUUM FULL, ANALYZE requires only a read lock on the target table, so it can run in parallel with other activity on the table.
For large tables, ANALYZE takes a random sample of the table contents, rather than examining every row. This allows even very large tables
to be analyzed in a small amount of time. Note however that the statistics are only approximate, and will change slightly each time ANALYZE
is run, even if the actual table contents did not change. This may result in small changes in the planner's estimated costs shown by
EXPLAIN.
The collected statistics usually include a list of some of the most common values in each column and a histogram showing the approximate
data distribution in each column. One or both of these may be omitted if ANALYZE deems them uninteresting (for example, in a unique-key
column, there are no common values) or if the column data type does not support the appropriate operators. There is more information about
the statistics in the User's Guide.
The extent of analysis can be controlled by adjusting the default_statistics_target parameter variable, or on a column-by-column basis by
setting the per-column statistics target with ALTER TABLE ALTER COLUMN SET STATISTICS (see ALTER TABLE [alter_table(7)]). The target value
sets the maximum number of entries in the most-common-value list and the maximum number of bins in the histogram. The default target value
is 10, but this can be adjusted up or down to trade off accuracy of planner estimates against the time taken for ANALYZE and the amount of
space occupied in pg_statistic. In particular, setting the statistics target to zero disables collection of statistics for that column. It
may be useful to do that for columns that are never used as part of the WHERE, GROUP BY, or ORDER BY clauses of queries, since the planner
will have no use for statistics on such columns.
The largest statistics target among the columns being analyzed determines the number of table rows sampled to prepare the statistics.
Increasing the target causes a proportional increase in the time and space needed to do ANALYZE.
COMPATIBILITY
SQL92
There is no ANALYZE statement in SQL92.
SQL - Language Statements 2002-11-22 ANALYZE(7)