Cara mendapatkan jumlah baris tertentu dari tabel yang berbeda di subquery

Gunakan:

   SELECT t1.*,
          COALESCE(x.num_rows, 0) AS entries
     FROM `table 1` t1
LEFT JOIN (SELECT t3.v_id,
                  COUNT(*) 'num_rows'
             FROM `table_3` t3
         GROUP BY t3.v_id) x ON x.v_id = t1.v_id