查询1天内的Top
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SELECT h.`name`, t.`description`, COUNT(*) num
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FROM `events` e
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JOIN `triggers` t ON e.`objectid`=t.`triggerid` AND t.`priority`>=2
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JOIN functions f ON f.`triggerid`=t.`triggerid`
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JOIN items i ON f.`itemid`=i.`itemid`
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JOIN `hosts` h ON i.`hostid`=h.`hostid`
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WHERE e.object=0 AND e.source=0 and e.`clock`>=UNIX_TIMESTAMP(DATE_SUB(NOW(),INTERVAL 1 DAY))
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GROUP BY h.`name`, t.`description`
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ORDER BY num DESC,t.`priority` DESC
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limit 100
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