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Top Forums Shell Programming and Scripting How to merge two files with unique values matching.? Post 302924068 by RudiC on Thursday 6th of November 2014 05:01:29 AM
Old 11-06-2014
Merging the two output files on the shell level should not be considered the smartest approach as SQL has the means - and is designed to do exactly that - to do the merge immediately in a query. Try like (my SQL has become somewhat rusty, so there may be smarter queries):
Code:
Select hobby, class, subject, sports, S.rollNumber, First_name, Last_name 
from Student_Table S, Name_Table N where S.rollnumber=N.rollnumber

 

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Class::DBI::AbstractSearch(3pm) 			User Contributed Perl Documentation			   Class::DBI::AbstractSearch(3pm)

NAME
Class::DBI::AbstractSearch - Abstract Class::DBI's SQL with SQL::Abstract::Limit SYNOPSIS
package CD::Music; use Class::DBI::AbstractSearch; package main; my @music = CD::Music->search_where( artist => [ 'Ozzy', 'Kelly' ], status => { '!=', 'outdated' }, ); my @misc = CD::Music->search_where( { artist => [ 'Ozzy', 'Kelly' ], status => { '!=', 'outdated' } }, { order_by => "reldate DESC", limit_dialect => 'LimitOffset', limit => 1 offset => 2 }); DESCRIPTION
Class::DBI::AbstractSearch is a Class::DBI plugin to glue SQL::Abstract::Limit into Class::DBI. METHODS
Using this module adds following methods into your data class. search_where $class->search_where(%where); Takes a hash to specify WHERE clause. See SQL::Abstract for hash options. $class->search_where(\%where,\%attrs); Takes hash reference to specify WHERE clause. See SQL::Abstract for hash options. Takes a hash reference to specify additional query attributes. Class::DBI::AbstractSearch uses these attributes: o order_by Array reference of fields that will be used to order the results of your query. o limit_dialect Scalar, DBI handle, object class, etc. that describes the syntax model for a LIMIT/OFFSET SQL clause. Please see SQL::Abstract::Limit for more information. o limit Scalar value that will be used for LIMIT argument in a query. o offset Scalar value that will be used for OFFSET argument in a query. Any other attributes are passed to the SQL::Abstract::Limit constructor, and can be used to control how queries are created. For example, to use 'AND' instead of 'OR' by default, use: $class->search_where(\%where, { logic => 'AND' }); AUTHOR
Tatsuhiko Miyagawa <miyagawa@bulknews.net> with some help from cdbi-talk mailing list, especially: Tim Bunce Simon Wilcox Tony Bowden This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
Class::DBI, SQL::Abstract, SQL::Abstract::Limit perl v5.10.0 2009-07-21 Class::DBI::AbstractSearch(3pm)
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