Number of articles in importance categories

We are interested in processing articles by importance. How many articles are in categories that match the importance-pattern?

SQL

USE enwiki_p;
SELECT count(DISTINCT page_id)
FROM page
JOIN categorylinks
ON page_id=cl_from
WHERE page_namespace=1
AND cl_to LIKE 'Top-importance%articles';
SELECT count(DISTINCT page_id)
FROM page
JOIN categorylinks
ON page_id=cl_from
WHERE page_namespace=1
AND cl_to LIKE 'High-importance%articles';
SELECT count(DISTINCT page_id)
FROM page
JOIN categorylinks
ON page_id=cl_from
WHERE page_namespace=1
AND cl_to LIKE 'Mid-importance%articles';
SELECT count(DISTINCT page_id)
FROM page
JOIN categorylinks
ON page_id=cl_from
WHERE page_namespace=1
AND cl_to LIKE 'Low-importance%articles';

SQL

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