sql left join的多表应用
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SELECT a.user1 用户,m1 总充值,m2 除设备自带金额充值, IFNULL(m3,0) 消费,m1-IFNULL(m3,0) 余额 FROM(SELECT SUM(rbd.`TRADEMONEY`+rbd.GIFTMONEY) AS m1,rbd.OPERATORID AS user1 FROM rb_balance_details rbd WHERE rbd.`TYPE` IN(0,1,3,4,9,10,11,12) AND rbd.TRADETIME<'2015-07-01 00:00:00' GROUP BY rbd.OPERATORID) aLEFT JOIN(SELECT SUM(rbd.`TRADEMONEY`+rbd.GIFTMONEY) AS m2,rbd.OPERATORID AS user2 FROM rb_balance_details rbd WHERE rbd.`TYPE` IN(0,1,3,4,9,10,12) AND rbd.TRADETIME<'2015-07-01 00:00:00' GROUP BY rbd.OPERATORID)b ON a.user1=b.user2LEFT JOIN(SELECT SUM(rbd.`TRADEMONEY`) AS m3,rbd.OPERATORID AS user3 FROM rb_balance_details rbd WHERE rbd.`TYPE` IN(2,6,8,13) AND rbd.TRADETIME<'2015-07-01 00:00:00' GROUP BY rbd.OPERATORID)c ON a.user1=c.user3
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