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WordPress database error: [Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'kitamae.wp_kitamaeposts.post_date' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by]
SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, count(ID) as posts FROM wp_kitamaeposts WHERE post_type = 'post' AND post_status = 'publish' GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date DESC