Deletion Ratios for one wiki during 2019

Example data for task https://phabricator.wikimedia.org/T246324. Shows ratio of main namespace articles that were created using Content Translation and not using Content Translation and subsequently deleted. This sample works for the Hungarian Wikipedia (huwiki) for 2019.

SQL

use huwiki_p;

set @dbname = 'huwiki';

set @ct_tag_id = (
  select
    ctd_id
  from
    change_tag_def
  where
    ctd_name = 'contenttranslation'
);

set @created_total = (
  select
    count(rev_id) 
  from
    page,
    revision
  where
    page_id = rev_page and
    page_namespace = 0 and
    rev_timestamp like '2019%' and
    rev_parent_id = 0
);

set @created_cx = (
  select
    count(rev_id)
  from
    change_tag,
    page,
    revision
  where
    page_id = rev_page and
    page_namespace = 0 and
    rev_id = ct_rev_id and
    rev_timestamp like '201601%' and
    rev_parent_id = 0 and
    ct_tag_id = @ct_tag_id
);

set @created_non_cx = (
  select (@created_total - @created_cx)
);

set @deleted_total = (
  select
    count(ar_id)
  from
    archive
  where
    ar_namespace = 0 and
    ar_timestamp like '201601%' and
    ar_parent_id = 0
);

set @deleted_cx = (
  select
    count(ar_id)
  from
    change_tag,
    archive
  where
    ar_namespace = 0 and
    ar_timestamp like '201601%' and
    ar_parent_id = 0 and
    ct_tag_id = @ct_tag_id and
    ar_rev_id = ct_rev_id
);

set @deleted_non_cx = (
  select (@deleted_total - @deleted_cx)
);

select
  @dbname,
  @created_cx 'New CX articles',
  @created_non_cx 'New non-CX articles',
  @deleted_cx 'Deleted CX articles',
  @deleted_non_cx 'Deleted non-CX articles',
  concat(((@deleted_cx / @created_cx) * 100), '%') 'Deleted CX %',
  concat(((@deleted_non_cx / @created_non_cx) * 100), '%') 'Deleted non-CX %';

SQL

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