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Full Discussion: Difference operator
Top Forums Shell Programming and Scripting Difference operator Post 302377516 by Fredrick on Friday 4th of December 2009 09:00:31 AM
Old 12-04-2009
Difference operator

Dear All,

Good day, Just i would like to know that is there anything called difference operator in awk?

For example, if a file contains 5 columns (as shown below) with both negative and positive values:
Col1 Col2 Col3 Col4 Col5

I need to calculate the difference between Col1 and Col2, Col2 and Col3, Col3 and Col4, Col4 and Col5, and i need to print out the same in an output file as: New_Col1 New_Col2 New_Col3 New_Col4

Can any one help me in this regard?

Expecting your reply and thanks in advance.

Regards
Fredrick.
 

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DROP 
OPERATOR(7) PostgreSQL 9.2.7 Documentation DROP OPERATOR(7) NAME
DROP_OPERATOR - remove an operator SYNOPSIS
DROP OPERATOR [ IF EXISTS ] name ( { left_type | NONE } , { right_type | NONE } ) [ CASCADE | RESTRICT ] DESCRIPTION
DROP OPERATOR drops an existing operator from the database system. To execute this command you must be the owner of the operator. PARAMETERS
IF EXISTS Do not throw an error if the operator does not exist. A notice is issued in this case. name The name (optionally schema-qualified) of an existing operator. left_type The data type of the operator's left operand; write NONE if the operator has no left operand. right_type The data type of the operator's right operand; write NONE if the operator has no right operand. CASCADE Automatically drop objects that depend on the operator. RESTRICT Refuse to drop the operator if any objects depend on it. This is the default. EXAMPLES
Remove the power operator a^b for type integer: DROP OPERATOR ^ (integer, integer); Remove the left unary bitwise complement operator ~b for type bit: DROP OPERATOR ~ (none, bit); Remove the right unary factorial operator x! for type bigint: DROP OPERATOR ! (bigint, none); COMPATIBILITY
There is no DROP OPERATOR statement in the SQL standard. SEE ALSO
CREATE OPERATOR (CREATE_OPERATOR(7)), ALTER OPERATOR (ALTER_OPERATOR(7)) PostgreSQL 9.2.7 2014-02-17 DROP OPERATOR(7)
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