How to compare the values of a column in a same file using awk?

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db2_field_num

DB2_FIELD_NUM(3)							 1							  DB2_FIELD_NUM(3)

db2_field_num - Returns the position of the named column in a result set

SYNOPSIS

       int db2_field_num (resource  $stmt, mixed  $column)

DESCRIPTION

	Returns the position of the named column in a result set.

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 0-indexed position of the named column in the result set. If the specified column does not exist in  the
       result set, db2_field_num(3) returns FALSE.

SEE ALSO

       db2_field_display_size(3), db2_field_name(3), db2_field_precision(3), db2_field_scale(3), db2_field_type(3), db2_field_width(3).

PHP Documentation Group 													  DB2_FIELD_NUM(3)

Shell Programming and Scripting