Deleting all rows that contain redundant information
My input file looks like this:
I want to delete all rows that have the same string for column 2, except the first row that contains that specific string such that my output would look like:
How do I go about doing that? Thanks!
Last edited by Scott; 06-16-2011 at 07:54 PM..
Reason: Code tags, please...
I am getting some spaces between the two lines(rows) in file.i want delete that empty rows in the file
example
1 abc xyz
2 def jkl
like i am having lots of rows in a file i want to delete the spce between the two rows give any... (7 Replies)
Hi,
I have a file that has rows that start with # and ends with #. For example..
# hi text
JK NM
JK NM
JK K
JK NM
# no
# yes
So I want to remove the #'s and put them into another file. so the output will be two files..
File 1:
JK NM
JK NM
JK K
JK NM (3 Replies)
Hello,
I am supposed to process about 100 csv files. But these files have some extra lines at the bottom of the file. these extra lines start with a header for each column and then some values below. These lines are actually a summary of the actual data and not supposed to be processed. These... (8 Replies)
Hi I posted earlier. This is sorta similar but I want to delete rows that dont have R, T, Y or U.
Nam1 RTYU
Nam2 RRTT
Nam3 RYTU
Nam4 IRTT
So the output would look like this?
Nam1 RTYU
Nam2 RRTT
Nam3 RYTU
too many problems
thanks (3 Replies)
Hi,
I want to delete rows that dont have a certain # of columns. In my case, rows that are less than 8 should be removed (those greater than 8 are ok).
For instance:
1 2 3 4 5 6 7 8
2 3 2 4 3 2 1 5
1 2 3 4 5 6 8
2 2 4 3 1
1 1 1 1 1 1 1 1
after:
1... (8 Replies)
Hi Guys,
I need help in modifying a large text file containing more than 1-2 lakh rows of data using unix commands. I am quite new to the unix language
the text file contains data in a pipe delimited format
sdfsdfs
sdfsdfsd
START_ROW
sdfsd|sdfsdfsd|sdfsdfasdf|sdfsadf|sdfasdf... (9 Replies)
Fruit : Price : Quantity
apple : 20 : 40
chiku : 40 :30
Hey guys, i have written a code using sed to delete a specific char which is being typed in. But the problem i am having is , how can i expand my coding to actually allow it do delete the whole row. For example,... (21 Replies)
Hi,
I want to delete rows whenever column one has the letters 'rpa'. The file is tab seperated.
e.g.
years 1
bears 1
cats 2
rpat 3
rpa99 4
rpa011 5
then removing 'rpa' containing rows based on the first column
years 1
bears 1
cats 2
thanks (7 Replies)
I have a text file that looks like this:
1 rs523634 8.22486
1
1 rs585160 8.22488
1 rs497228 8.2249
1
1 rs600933 8.225
1 rs480106 8.22531
1 rs600199 8.22533
1 rs529015 8.22534
1 rs598894 8.22534
I want to delete the rows with empty... (2 Replies)
there are 20 variables and I would like to delete the rows if 13th-20th columns are all NA.
Thank you!
FID IID aspirpre statihos fibrahos ocholhos arbhos betabhos alphbhos cacbhos diurehos numbcig.x toast1 toast2 toast3 toast4 ischoth1 ischoth2 ischoth3 ischoth4
101 101 1 1 1 1 1 2 1 2... (2 Replies)
Discussion started by: johnkim0806
2 Replies
LEARN ABOUT PHP
pdostatement.fetchcolumn
PDOSTATEMENT.FETCHCOLUMN(3) 1 PDOSTATEMENT.FETCHCOLUMN(3)PDOStatement::fetchColumn - Returns a single column from the next row of a result set
SYNOPSIS
public mixed PDOStatement::fetchColumn ([int $column_number])
DESCRIPTION
Returns a single column from the next row of a result set or FALSE if there are no more rows.
Note
PDOStatement.fetchColumn(3) should not be used to retrieve boolean columns, as it is impossible to distinguish a value of FALSE from
there being no more rows to retrieve. Use PDOStatement.fetch(3) instead.
PARAMETERS
o $column_number
- 0-indexed number of the column you wish to retrieve from the row. If no value is supplied, PDOStatement.fetchColumn(3) fetches
the first column.
RETURN VALUES PDOStatement.fetchColumn(3) returns a single column in the next row of a result set.
Warning
There is no way to return another column from the same row if you use PDOStatement.fetchColumn(3) to retrieve data.
EXAMPLES
Example #1
Return first column of the next row
<?php
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();
print("Fetch the first column from the first row in the result set:
");
$result = $sth->fetchColumn();
print("name = $result
");
print("Fetch the second column from the second row in the result set:
");
$result = $sth->fetchColumn(1);
print("colour = $result
");
?>
The above example will output:
Fetch the first column from the first row in the result set:
name = lemon
Fetch the second column from the second row in the result set:
colour = red
SEE ALSO PDO.query(3), PDOStatement.fetch(3), PDOStatement.fetchAll(3), PDO.prepare(3), PDOStatement.setFetchMode(3).
PHP Documentation Group PDOSTATEMENT.FETCHCOLUMN(3)