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Full Discussion: Replace first column in 17GB File
Top Forums Shell Programming and Scripting Replace first column in 17GB File Post 302962917 by fedora132010 on Monday 21st of December 2015 12:39:42 AM
Old 12-21-2015
Replace first column in 17GB File
Hi All,

I have a 17GB file and i want to set the first column from 1234567890 to just 0, how can i do it using sed command?

thanks,

---------- Post updated at 03:09 PM ---------- Previous update was at 03:07 PM ----------

btw, my file is delimited by "|" and 1234567890 is just an example value of first column.

it's like this:

Code:
1234567890|abcddc|sfcdcd|12-12-2015|
212|fddfdgg|sdfdferruut|12-30-2014|

Last edited by Don Cragun; 12-21-2015 at 02:13 AM.. Reason: Add CODE and ICODE tags.
 

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LEARN ABOUT PHP

db2_field_width

DB2_FIELD_WIDTH(3)							 1							DB2_FIELD_WIDTH(3)

db2_field_width - Returns the width of the current value of the indicated column in a result set

SYNOPSIS

       int db2_field_width (resource  $stmt, mixed  $column)

DESCRIPTION

	Returns the width of the current value of the indicated column in a result set. This is the maximum width of the column for a fixed-length
       data type, or the actual width of the column for a variable-length data type.

PARAMETERS

	      o $stmt
		- Specifies a statement resource containing a result set.

	      o $column
		- Specifies the column in the result set. This can either be an integer representing the 0-indexed position of the  column,  or  a
		string containing the name of the column.

RETURN VALUES

	Returns  an  integer  containing  the width of the specified character or binary data type column in a result set. If the specified column
       does not exist in the result set, db2_field_width(3) returns FALSE.

SEE ALSO

       db2_field_display_size(3), db2_field_name(3), db2_field_num(3), db2_field_precision(3), db2_field_scale(3), db2_field_type(3).

PHP Documentation Group 													DB2_FIELD_WIDTH(3)
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