mysql left join写法

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SELECT * FROM (select distinct `vOpenID` as vopenid from t_PlayerRegister where  1=1 and  1=1 and  dtEventTimei+8*3600<1481817600 AND dtEventTimei>1481212800 and  dtRegTimei+8*3600<1481817600 AND dtRegTimei>1481212800) as a LEFT JOIN (SELECT vopenid,COUNT(*) as num FROM t_PlayerRegister WHERE dtEventTimei+8*3600<1481817600 GROUP BY vopenid HAVING num>1) as b ON a.vopenid = b.vopenid
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