Bytes added or deleted

This query is marked as a draft This query has been published by Ananth subray.
SQL

use knwiki_p;
SELECT anon_1.rev_user AS anon_1_rev_user,
            sum(anon_1.byte_change) AS net_sum,
            sum(abs(anon_1.byte_change)) AS absolute_sum,
            sum(CASE
                    WHEN (anon_1.byte_change > 0)
                    THEN anon_1.byte_change
                    ELSE 0 END
               ) AS positive_only_sum,
            sum(CASE
                    WHEN (anon_1.byte_change < 0)
                    THEN anon_1.byte_change
                    ELSE 0 END
               ) AS negative_only_sum,
            user_registration,
            user_name
       FROM (SELECT revision.rev_user AS rev_user,
                    (   cast(revision.rev_len as signed)
                        - cast(coalesce(anon_2.rev_len, 0) as signed)
                    ) AS byte_change
               FROM revision
                        INNER JOIN
                    page        ON page.page_id = revision.rev_page
                        LEFT OUTER JOIN
                    (SELECT revision.rev_id AS rev_id,
                            revision.rev_len AS rev_len
                       FROM revision
                    ) AS anon_2 ON revision.rev_parent_id = anon_2.rev_id
              WHERE revision.rev_timestamp > '20170130235959' and revision.rev_timestamp < '20170801000000' and rev_user_text in ("Sameer Sahu","Durlove bhai
","Saumyasmita padhan
","Mirza azzaruddin bayg
","ମଥୁରା ନାଏକ
","Abinash jagat
","Sneha Mishra
","Ipsita sahoo
","Khusboo dalbehera
","Akankshya Nayak
","Kschoudhry ","Susmita bhoi
","Parismita Pandia
","Debasmita Nayak
","Rajshree Rath
","Bkbeura
","Sushree Mitali Mohanta
","Anupama sahu
","Lalit Deep
","RAJAT KUMAR BUDEK 
","Sonika Mishra
","GAYATRI KARALI 
","Pattnaik.chandan
","Ashutoshatm9438
","Satyakam Parthasarathy
","Sanjeetkunu
","Arpitsatwik
","Nitun007
","ପ୍ରଶାନ୍ତ
","Abhay Kumar Tripathy
","ଆଲୋକ କୁମାାର ପର୍ଡିଆ
","Prasantadasgouranga
","Premakanta Mahapatra
","Sanghamitra Mohanty
","ବିକାଶଓଝା
","AshokWikiAc
","Bikash Ojha
","Abha S Pradhan
","Rajmishra757
","Nihar Ranjan Mohanty
","Jnanaranjan sahu
","Chinmayee Mishra
","Subas Chandra Rout
","Dinesh.das.171
","Dorajagannath8
","Aliva Sahoo
","Bikash Ojha
","Nihar Ranjan Mohanty
","Soumya srp
","Sthita Prajna Moharana
","Chinmayee Mishra
","Abha S Pradhan
","Aliva Sahoo
","Bikash Ojha
","Chinmayee Mishra
","MinatiBr
","Sthita Prajna Moharana
","Abha S Pradhan
","Abinash Mishra302
","Adyasha1994
","Amita bhuyan
","Anjana Mohanty
","Arpita Nath Sharma
","Bandana Mishra
","Bijayasri mohapatra
","Bikash Ojha
","Chinmayee Mishra
","Chitrangada Pradhan
","Debashree Behera
","Dorajagannath8
","Jnanaranjan sahu
","Jyotsna Pradhan
","Kiranbala sahoo
","Kusmita Samal
","Lovely Sahoo
","MadusmitaSwain
","Mahapatra shrutishikha
","Nihar Ranjan Mohanty
","Panigrahiasmitku
","Pranjna parimita Behera
","Ramachanra nayak
","Reena Ram
","Rojalin das
","Rojalin mishra
","Soumya Sucharita Dash
","Sthita Prajna Moharana
","Tusharkanta19.mahapatra
","Anjana Mohanty
","Bijayasri mohapatra
","Bikash Ojha
","Chinmayee Mishra
","Kusmita Samal
","ଆଲୋକ କୁମାାର ପର୍ଡିଆ
","ସନ୍ତୋଷ କୁମାର ନାୟକ
","Adyasha1994
","Abinash Mishra302
","Aliva Sahoo
","Bikash Ojha
","Chitrangada Pradhan
","Kusmita Samal
","Lovely Sahoo
","Sibasankarbarada") AS anon_1
       JOIN user ON user_id=rev_user
GROUP BY user_name
ORDER BY absolute_sum DESC;
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