Number of categories containing at least one article on enwikibooks

This query is marked as a draft This query has been published by Tacsipacsi.

This query is used to update https://en.wikibooks.org/wiki/Template:RC/doc/use-count/doc, as usage through MediaWiki messages doesn’t show up on Special:WhatLinksHere (i.e. the templatelinks table).

SQL

USE enwikibooks_p;
SELECT COUNT(*) FROM category WHERE cat_title IN (SELECT page_title FROM page WHERE page_namespace = 14) AND cat_pages > 0;

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SQL

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