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Query: SELECT YEAR(p.birthdatetr)-YEAR(father.birthdatetr) AS parents_age, COUNT(*) AS Number_, RPAD('',COUNT(*)/20,'M') AS Graph FROM tng_children AS ch LEFT JOIN tng_people AS p ON (ch.personID=p.personID AND ch.gedcom=p.gedcom) LEFT JOIN tng_families AS f ON (ch.familyID=f.familyID AND ch.gedcom=f.gedcom) LEFT JOIN tng_people AS father ON (father.personID=f.husband AND father.gedcom=f.gedcom) WHERE p.birthdatetr<>"0000-00-00" AND father.birthdatetr<>"0000-00-00" AND YEAR(p.birthdatetr)-YEAR(father.birthdatetr)>15 AND YEAR(p.birthdatetr)-YEAR(father.birthdatetr)<60 GROUP BY parents_age UNION SELECT YEAR(p.birthdatetr)-YEAR(mother.birthdatetr) AS parents_age, COUNT(*) AS Number_, RPAD('',COUNT(*)/20,'F') AS Graph FROM tng_children AS ch LEFT JOIN tng_people AS p ON (ch.personID=p.personID AND ch.gedcom=p.gedcom) LEFT JOIN tng_families AS f ON (ch.familyID=f.familyID AND ch.gedcom=f.gedcom) LEFT JOIN tng_people AS mother ON (mother.personID=f.wife AND mother.gedcom=f.gedcom) WHERE p.birthdatetr<>"0000-00-00" AND mother.birthdatetr<>"0000-00-00" AND YEAR(p.birthdatetr)-YEAR(mother.birthdatetr)>15 AND YEAR(p.birthdatetr)-YEAR(mother.birthdatetr)<60 GROUP BY parents_age ORDER BY parents_age LIMIT 800

Lost connection to MySQL server during query