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SELECT p.ID FROM wp_posts AS p INNER JOIN wp_term_relationships AS tr ON p.ID = tr.object_id INNER JOIN wp_term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE p.ID = '1506' AND p.ID < 1367)) AND p.post_type = 'docs' AND tt.taxonomy = 'doc_category' AND tt.term_id IN (51) AND p.ID NOT IN ( SELECT tr.object_id FROM wp_term_relationships tr LEFT JOIN wp_term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id) WHERE tt.term_id IN (0) ) AND p.post_status = 'publish' ORDER BY p.post_date DESC, p.ID DESC LIMIT 1

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SELECT p.ID FROM wp_posts AS p INNER JOIN wp_term_relationships AS tr ON p.ID = tr.object_id INNER JOIN wp_term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE p.ID = '0' AND p.ID > 1367)) AND p.post_type = 'docs' AND tt.taxonomy = 'doc_category' AND tt.term_id IN (51) AND p.ID NOT IN ( SELECT tr.object_id FROM wp_term_relationships tr LEFT JOIN wp_term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id) WHERE tt.term_id IN (0) ) AND p.post_status = 'publish' ORDER BY p.post_date ASC, p.ID ASC LIMIT 1