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Full Discussion: awk help
Top Forums Shell Programming and Scripting awk help Post 302505464 by mukeshguliao on Thursday 17th of March 2011 03:23:23 AM
Old 03-17-2011
awk help

i have a file like

Code:
 
col1, col2, col3, col4, col5, col6,col7,col8
a,b,c,d,e,1,t,11
b,e,,w,,1,,
c,r,c,d,e,1,t,11
d,f,c,g,w,1,e,22
e,f,c,d,e,1,w,33
f,e,f,r,t,1,t,22
g,h,t,d,e,2,s,22
h,t,,,e,2,f,
a,r,,,w,2,,
f,r,r,d,e,2,f,44
e,b,h,d,t,2,d,55
a,r,h,d,e,2,g,66
a,b,c,d,e,2,44
a,b,c,d,e,2,,
a,b,c,d,e,2,
a,b,c,d,e,2,55

I am concenered with specific cols -- (col6, col8) -- (1,11)

what i need to do is make out a new file out of this containing unique records of (col6,col8) excluding spaces in col8.

output of the above sample is:

Code:
 
1,11
1,22
1,33
2,44
2,55
2,66

this removes the duplicates, but how to ignore the blank of col8,

i tried this
Code:
 
nawk -F, '!a[$6,$8]++ {print $6 "," $8}' sample.dat

but it gives this output
Code:
 col6,col8
,
1,11
1,
1,22
1,33
2,22
2,
2,44
2,55
2,66

what is that extra , after first line and how can i ignore blanks of col8.
pls help

Moderator's Comments:
Mod Comment Please use a more descriptive subject title. "awk help" is not useful. Say what awk help you want.

Last edited by Scott; 03-17-2011 at 05:30 PM..
 

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MYSQLI_STMT.BIND_RESULT(3)						 1						MYSQLI_STMT.BIND_RESULT(3)

mysqli_stmt::bind_result - Binds variables to a prepared statement for result storage

       Object oriented style

SYNOPSIS
bool mysqli_stmt::bind_result (mixed &$var1, [mixed &$...]) DESCRIPTION
Procedural style bool mysqli_stmt_bind_result (mysqli_stmt $stmt, mixed &$var1, [mixed &$...]) Binds columns in the result set to variables. When mysqli_stmt_fetch(3) is called to fetch data, the MySQL client/server protocol places the data for the bound columns into the speci- fied variables $var1, .... Note Note that all columns must be bound after mysqli_stmt_execute(3) and prior to calling mysqli_stmt_fetch(3). Depending on column types bound variables can silently change to the corresponding PHP type. A column can be bound or rebound at any time, even after a result set has been partially retrieved. The new binding takes effect the next time mysqli_stmt_fetch(3) is called. PARAMETERS
o $ stmt -Procedural style only: A statement identifier returned by mysqli_stmt_init(3). o $var1 - The variable to be bound. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Object oriented style <?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); if (mysqli_connect_errno()) { printf("Connect failed: %s ", mysqli_connect_error()); exit(); } /* prepare statement */ if ($stmt = $mysqli->prepare("SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) { $stmt->execute(); /* bind variables to prepared statement */ $stmt->bind_result($col1, $col2); /* fetch values */ while ($stmt->fetch()) { printf("%s %s ", $col1, $col2); } /* close statement */ $stmt->close(); } /* close connection */ $mysqli->close(); ?> Example #2 Procedural style <?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (!$link) { printf("Connect failed: %s ", mysqli_connect_error()); exit(); } /* prepare statement */ if ($stmt = mysqli_prepare($link, "SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) { mysqli_stmt_execute($stmt); /* bind variables to prepared statement */ mysqli_stmt_bind_result($stmt, $col1, $col2); /* fetch values */ while (mysqli_stmt_fetch($stmt)) { printf("%s %s ", $col1, $col2); } /* close statement */ mysqli_stmt_close($stmt); } /* close connection */ mysqli_close($link); ?> The above examples will output: AFG Afghanistan ALB Albania DZA Algeria ASM American Samoa AND Andorra SEE ALSO
mysqli_stmt_get_result(3), mysqli_stmt_bind_param(3), mysqli_stmt_execute(3), mysqli_stmt_fetch(3), mysqli_prepare(3), mysqli_stmt_pre- pare(3), mysqli_stmt_init(3), mysqli_stmt_errno(3), mysqli_stmt_error(3). PHP Documentation Group MYSQLI_STMT.BIND_RESULT(3)
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