Mysql group by 分組統計優化

利用GROUP BY統計大數據時，應當將查詢與統計分離，優化查詢語句。 優化前查詢php SELECT cpe_id, COUNT(*) restarts FROM business_log WHERE operate_time>='2012-12-05 00:00:00' AND operate_time<'2018-01-05 00:00:00' AND operate_type=3 AND

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